ORCID Profile
0000-0002-4777-4017
Current Organisation
Queensland University of Technology
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Functional Materials | Synthesis of Materials | Materials Engineering | Composite and Hybrid Materials | Materials engineering | Physical properties of materials | Nanotechnology | Macromolecular and Materials Chemistry | Colloid and Surface Chemistry | Transition Metal Chemistry | Ceramics | Polymers and plastics | Composite and hybrid materials | Nanomaterials | Nanotechnology |
Expanding Knowledge in Engineering | Ceramics, Glass and Industrial Mineral Products not elsewhere classified | Energy Storage (excl. Hydrogen) | Solar-photoelectric | Energy systems analysis | Inorganic Industrial Chemicals | Other non-ferrous metals (e.g. copper,zinc) | Solar-Thermal Electric Energy | Environmentally Sustainable Energy Activities not elsewhere classified | Basic Iron and Steel Products | Expanding Knowledge in the Chemical Sciences | Ceramics
Publisher: Wiley
Date: 14-06-2023
Abstract: It is well known that electrocatalytic oxygen evolution reaction (OER) activities primarily depend on the active centers of electrocatalysts. In some oxide electrocatalysts, high‐valence metal sites (e.g., molybdenum oxide) are generally not the real active centers for electrocatalytic reactions, which is largely due to their undesired intermediate adsorption behaviors. As a proof‐of‐concept, molybdenum oxide catalysts are selected as a representative model, in which the intrinsic molybdenum sites are not the favorable active sites. Via phosphorus‐modulated defective engineering, the inactive molybdenum sites can be regenerated as synergistic active centers for promoting OER. By virtue of comprehensive comparison , it is revealed that the OER performance of oxide catalysts is highly associated with the phosphorus sites and the molybdenum/oxygen defects. Specifically, the optimal catalyst delivers an overpotential of 287 mV to achieve the current density of 10 mA cm −2 , accompanied by only 2% performance decay for continuous operation up to 50 h. It is expected that this work sheds light on the enrichment of metal active sites via activating inert metal sites on oxide catalysts for boosting electrocatalytic properties.
Publisher: Wiley
Date: 15-03-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1TA09019D
Abstract: In situ fabricated Bi 2 O 3 nanosheets with both α-Bi 2 O 3 and Bi x Ni alloy phases, simultaneously contributing to the water dissociation step and the hydrogen formation step, demonstrate high HER electrocatalytic activity in alkaline media.
Publisher: Elsevier BV
Date: 11-2008
Publisher: Wiley
Date: 08-2008
Publisher: American Chemical Society (ACS)
Date: 14-05-2021
Publisher: Wiley
Date: 08-10-2021
Abstract: 2D black phosphorus (BP) is one promising electrocatalyst toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysis. The too strong adsorption of oxygen intermediates during OER, while the too weak adsorption of hydrogen intermediate during HER, however, greatly compromise its practical water splitting applications with overpotentials as high as 450 mV for OER and 420 mV for HER to achieve 10 mA cm −2 under alkaline conditions. Herein, by rationally introducing the nanosized iridium (Ir) modifier together with optimized exposing surface toward electrolytes, an efficient Ir‐modified BP electrocatalyst with much favorable adsorption energies toward catalytic intermediates possesses an outstanding pH‐universal water splitting performance, surpassing the nearly all reported BP‐based catalysts and the commercial noble‐metal catalysts. The Ir‐modified BP catalyst with the optimized exposed surfaces only requires an overall cell voltage of 1.54 and 1.57 V to achieve 10 mA cm −2 in acidic and alkaline electrolysers, respectively. This design uncovers the potential applications of 2D BP in practical electrocatalysis fields via decreasing reaction intermediate adsorption energy barriers and promoting the interfacial electron coupling for heterostructured catalysts, and offers new insights into the surface‐dependent activity enhancement mechanism.
Publisher: Wiley
Date: 03-10-2022
Abstract: As an emerging 2D layered material, black phosphorus (BP) has received intensive attention in recent years, particularly in electrocatalysis and rechargeable batteries. With further structural modifications, BP‐based heterostructured composites have exhibited attractive physical and chemical properties regarding to enhanced conductivity, ion transport, and catalysis activity, endowing them as potential candidates for electrochemical ions storage and electro/chemical catalysis. In this perspective, a brief summary is first given on the recent progress of BP and BP‐derived materials in electrocatalysis, such as hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and nitrogen reduction reaction (NRR), and in rechargeable batteries, such as lithium‐ion batteries (LIBs), sodium‐ion batteries (SIBs), and potassium‐ion batteries (PIBs), followed by a critical review on the current opportunities and challenges. It is expected that this class of emerging materials will bring about new potential solutions to address the current energy crisis and inspire researchers to develop more novel materials toward future multifunctional applications.
Publisher: American Chemical Society (ACS)
Date: 21-11-2016
DOI: 10.1021/ACS.NANOLETT.6B04180
Abstract: Recently synthesized atomically thin boron sheets (that is, borophene) provide a fascinating template for new material property discovery. Here, we report findings of an extraordinary combination of unusual mechanical and electronic properties in hydrogenated borophene, known as borophane, from first-principles calculations. This novel 2D material has been shown to exhibit robust Dirac transport physics. Our study unveils that borophane is auxetic with a surprising negative Poisson's ratio stemming from its unique puckered triangle hinge structure and the associated hinge dihedral angle variation under a tensile strain in the armchair direction. Our results also identify borophane to be ferroelastic with a stress-driven 90° lattice rotation in the boron layer, accompanied by a remarkable orientation switch of the anisotropic Dirac transport channels. These outstanding strain-engineered properties make borophane a highly versatile and promising 2D material for innovative applications in microelectromechanical and nanoelectronic devices.
Publisher: Elsevier BV
Date: 06-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM30387F
Publisher: Springer Science and Business Media LLC
Date: 03-2008
Abstract: Y 2 SiO 5 has potential applications as a high-temperature structural ceramic and environmental/thermal barrier coating. In this work, we synthesized single-phase Y 2 SiO 5 powders utilizing a solid–liquid reaction method with LiYO 2 as an additive. The reaction path of the Y 2 O 3 /SiO 2 /LiYO 2 mixture with variation in temperatures and the role of the LiYO 2 additive on preparation process were investigated in detail. The powders obtained by this method have good sinterability. Through a pressureless sintering process, almost fully dense Y 2 SiO 5 bulk material was achieved with a very high density of 99.7% theoretical.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NR06428A
Abstract: 3D hierarchically porous WO 3 has been constructed through confined interfacial micelle aggregating assembly approach. Owing to unique porous structure and crystalline frameworks, the obtained material shows excellent performance for detection of H 2 S.
Publisher: Elsevier BV
Date: 02-2023
Publisher: Wiley
Date: 07-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0EE00387E
Publisher: American Chemical Society (ACS)
Date: 06-08-2021
Abstract: Layered sodium titanates (NTO), one of the most promising anode materials for advanced sodium-ion batteries (SIBs), feature high theoretical capacity and no serious safety concerns. The pristine NTO electrode, however, has unfavorable Na
Publisher: Wiley
Date: 03-2019
DOI: 10.1002/INF2.12002
Publisher: The Electrochemical Society
Date: 2011
DOI: 10.1149/1.3591040
Publisher: American Chemical Society (ACS)
Date: 03-04-2023
Publisher: American Chemical Society (ACS)
Date: 26-01-2021
Publisher: Springer Science and Business Media LLC
Date: 12-05-2014
DOI: 10.1038/NCOMMS4813
Abstract: Two-dimensional (2D) transition metal oxide systems present exotic electronic properties and high specific surface areas, and also demonstrate promising applications ranging from electronics to energy storage. Yet, in contrast to other types of nanostructures, the question as to whether we could assemble 2D nanomaterials with an atomic thickness from molecules in a general way, which may give them some interesting properties such as those of graphene, still remains unresolved. Herein, we report a generalized and fundamental approach to molecular self-assembly synthesis of ultrathin 2D nanosheets of transition metal oxides by rationally employing lamellar reverse micelles. It is worth emphasizing that the synthesized crystallized ultrathin transition metal oxide nanosheets possess confined thickness, high specific surface area and chemically reactive facets, so that they could have promising applications in nanostructured electronics, photonics, sensors, and energy conversion and storage devices.
Publisher: Elsevier BV
Date: 05-2019
Publisher: Wiley
Date: 16-03-2016
Abstract: Hierarchical SnO2 hollow spheres self-assembled from nanosheets were prepared with and without carbon coating. The combination of nanosized architecture, hollow structure, and a conductive carbon layer endows the SnO2 -based anode with improved specific capacity and cycling stability, making it more promising for use in lithium ion batteries.
Publisher: Elsevier BV
Date: 04-2009
Publisher: Wiley
Date: 2009
Publisher: Wiley
Date: 31-05-2022
Abstract: 2D heterostructures provide another exciting opportunity for extending the application of 2D materials in energy conversion and storage devices, due to their flexibility in electronic structure modulations and surface chemistry regulations. Herein, by coupling liquid‐exfoliated and mildly oxidized black phosphorus nanosheets (BP‐NSs) with wet‐chemically synthesized 2D nickel Ni(OH) 2 nanosheets (NH‐NSs), 2D/2D heterostructured nanosheets (BNHNSs) are rationally constructed with a favorable transition of electron structure and desired intermediate adsorptions for alkaline oxygen evolution reaction (OER) catalysis. When used as an OER catalyst, to reach a current density of 10 mA cm −2 , the overpotential of 2D/2D BNHNSs is only 297 mV, corresponding to a considerable decrease of 22% and 34% compared with the in idual 2D NH‐NSs and 2D BP‐NSs, respectively. The structural tracking at the initial reconstruction stage via time‐dependent Raman spectra confirms that the phosphorus oxidization into the P–OH and the phase transformation into oxyhydroxide (NiOOH) significantly promote the electron transfer and electrocatalytic efficiency and thus endow the 2D/2D BNHNSs with much enhanced OER catalytic activity. This work offers new insights on the electron structure modulation of 2D‐based heterostructures and opens new avenues for regulating the adsorption of emerging phosphorene‐based materials for electrocatalysis.
Publisher: Wiley
Date: 30-08-2011
Publisher: Elsevier BV
Date: 2018
Publisher: Wiley
Date: 06-07-2016
Abstract: TiO2 nanostructures are being sought after as flexibly utilizable building blocks for the fabrication of the mesoporous thin-film photoelectrodes that are the heart of the third-generation photovoltaic devices, such as dye-sensitized solar cells (DSSCs), quantum-dot-sensitized solar cells (QDSSCs), and the recently promoted perovskite-type solar cells. Here, we report deliberate tailoring of TiO2 nanostructures for superior photovoltaic cells. Morphology engineering of TiO2 nanostructures is realized by designing synthetic protocols in which the precursor hydrolysis, crystal growth, and oligomer self-organization are precisely controlled. TiO2 nanostructures in forms varying from isolated nanocubes, nanorods, and cross-linked nanorods to complex hierarchical structures and shape-defined mesoporous micro-/nanostructures were successfully synthesized. The photoanodes made from the shape-defined mesoporous TiO2 microspheres and nanospindles presented superior performances, owing to the well-defined overall shapes and the inner ordered nanochannels, which allow not only a high amount of dye uptake, but also improved visible-light absorption. This study provides a new way to seek an optimal synthetic protocol to meet the required functionality of the nanomaterials.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CE00014H
Publisher: Elsevier BV
Date: 12-2016
Publisher: Elsevier
Date: 2020
Publisher: Elsevier BV
Date: 05-2009
Publisher: Wiley
Date: 05-2020
Publisher: Elsevier BV
Date: 05-2014
Publisher: American Chemical Society (ACS)
Date: 25-01-2017
Abstract: Developing an effective system to clean up large-scale oil spills is of great significance due to their contribution to severe environmental pollution and destruction. Superwetting membranes have been widely studied for oil/water separation. The separation, however, adopts a gravity-driven approach that is inefficient and discontinuous due to quick fouling of the membrane by oil. Herein, inspired by the crossflow filtration behavior in fish gills, we propose a crossflow approach via a hydrophilic, tilted gradient membrane for spilled oil collection. In crossflow collection, as the oil/water flows parallel to the hydrophilic membrane surface, water is gradually filtered through the pores, while oil is repelled, transported, and finally collected for storage. Owing to the selective gating behavior of the water-sealed gradient membrane, the large pores at the bottom with high water flux favor fast water filtration, while the small pores at the top with strong oil repellency allow easy oil transportation. In addition, the gradient membrane exhibits excellent antifouling properties due to the protection of the water layer. Therefore, this bioinspired crossflow approach enables highly efficient and continuous spilled oil collection, which is very promising for the cleanup of large-scale oil spills.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA04277H
Abstract: We design novel symmetric supercapacitors based on nanoporous carbons (NPCs) by direct carbonization of Zn-based metal–organic frameworks (MOFs).
Publisher: Wiley
Date: 08-2009
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2MH01217K
Abstract: In two-dimensional (2D) Fe-doped MFe-LDHs, volcano-shaped relationships between the catalytic activity descriptors and the Fe contents are identified, and a new activity descriptor, the intermediate adsorption capacitance (CPE ad ), is proposed.
Publisher: Elsevier BV
Date: 08-2011
Publisher: Springer Science and Business Media LLC
Date: 04-2022
DOI: 10.1007/S40820-022-00832-6
Abstract: Oxygen vacancies ( V o ) in electrocatalysts are closely correlated with the hydrogen evolution reaction (HER) activity. The role of vacancy defects and the effect of their concentration, however, yet remains unclear. Herein, Bi 2 O 3 , an unfavorable electrocatalyst for the HER due to a less than ideal hydrogen adsorption Gibbs free energy (Δ G H* ), is utilized as a perfect model to explore the function of V o on HER performance. Through a facile plasma irradiation strategy, Bi 2 O 3 nanosheets with different V o concentrations are fabricated to evaluate the influence of defects on the HER process. Unexpectedly, while the generated oxygen vacancies contribute to the enhanced HER performance, higher V o concentrations beyond a saturation value result in a significant drop in HER activity. By tunning the V o concentration in the Bi 2 O 3 nanosheets via adjusting the treatment time, the Bi 2 O 3 catalyst with an optimized oxygen vacancy concentration and detectable charge carrier concentration of 1.52 × 10 24 cm −3 demonstrates enhanced HER performance with an overpotential of 174.2 mV to reach 10 mA cm −2 , a Tafel slope of 80 mV dec −1 , and an exchange current density of 316 mA cm −2 in an alkaline solution, which approaches the top-tier activity among Bi-based HER electrocatalysts. Density-functional theory calculations confirm the preferred adsorption of H* onto Bi 2 O 3 as a function of oxygen chemical potential (∆ μ O ) and oxygen partial potential ( P O2 ) and reveal that high V o concentrations result in excessive stability of adsorbed hydrogen and hence the inferior HER activity. This study reveals the oxygen vacancy concentration-HER catalytic activity relationship and provides insights into activating catalytically inert materials into highly efficient electrocatalysts.
Publisher: American Chemical Society (ACS)
Date: 11-08-2023
Publisher: Wiley
Date: 23-12-2021
Abstract: Ion transport behaviours through cell membranes are commonly identified in biological systems, which are crucial for sustaining life for organisms. Similarly, ion transport is significant for electrochemical ion storage in rechargeable batteries, which has attracted much attention in recent years. Rapid ion transport can be well achieved by crystal channels engineering, such as creating pores or tailoring interlayer spacing down to the nanometre or even sub‐nanometre scale. Furthermore, some functional channels, such as ion selective channels and stimulus‐responsive channels, are developed for smart ion storage applications. In this review, the typical ion transport phenomena in the biological systems, including ion channels and pumps, are first introduced, and then ion transport mechanisms in solid and liquid crystals are comprehensively reviewed, particularly for the widely studied porous inorganic/organic hybrid crystals and ultrathin inorganic materials. Subsequently, recent progress on the ion transport properties in electrodes and electrolytes is reviewed for rechargeable batteries. Finally, current challenges in the ion transport behaviours in rechargeable batteries are analysed and some potential research approaches, such as bioinspired ultrafast ion transport structures and membranes, are proposed for future studies. It is expected that this review can give a comprehensive understanding on the ion transport mechanisms within crystals and provide some novel design concepts on promoting electrochemical ion storage capability in rechargeable batteries.
Publisher: Springer Science and Business Media LLC
Date: 26-09-2023
Publisher: Wiley
Date: 04-09-2023
DOI: 10.1002/EEM2.12668
Publisher: American Chemical Society (ACS)
Date: 25-08-2023
Publisher: Wiley
Date: 25-01-2021
Publisher: The Electrochemical Society
Date: 2018
DOI: 10.1149/2.0901805JES
Publisher: American Chemical Society (ACS)
Date: 12-07-2019
Abstract: Two-dimensional (2D) bismuth oxide (Bi
Publisher: Elsevier BV
Date: 07-2020
Publisher: Wiley
Date: 08-2008
Publisher: Springer Science and Business Media LLC
Date: 11-08-2023
Publisher: Springer Science and Business Media LLC
Date: 16-10-2014
DOI: 10.1038/SREP06641
Publisher: Wiley
Date: 22-04-2014
Abstract: Fly-eye bio-inspired inorganic nanostructures are synthesized via a two-step self-assembly approach, which have low contact angle hysteresis and excellent anti-fogging properties, and are promising candidates for anti-freezing/fogging materials to be applied in extreme and hazardous environments.
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 03-2016
Publisher: Elsevier BV
Date: 02-2022
Publisher: Wiley
Date: 03-05-2022
Abstract: Immunosensor with photoelectrochemistry and fluorescence responsibility is widely used in biomedical detection, health monitoring, and food safety inspection. The cumbersome configuration and low integration of the current immunosensors, however, have brought challenges for their practical applications. To address these challenges, a portable and phone‐APP controlled dual‐modular immunosensor based on a bimetallic metal–organic framework (MOF) heterostructured photoelectrode, ZnO/NiZn‐MOF/CdS, grafted with an enzyme‐mimicking Au@CuO/Cu 2 O label is constructed to achieve simultaneous photoelectrochemistry and fluorescence signage. In the electrode design, the construction of a bimetallic NiZn metal–organic framework (NiZn‐MOF) into the common ZnO/CdS photoresponsive structure achieves significant and stable photocurrent output under a very low‐power LED light source for not only accelerating the transfer of photogenerated electrons from CdS to ZnO, but also stabilizing the holes of CdS to improve its photocorrosion resistance. After the graft of multifunctional enzyme‐mimicking Au@CuO/Cu 2 O label clusters, a portable dual‐modular immunosensor is built for the detection of rosiglitazone, a common antidiabetic drug and strictly restricted food residual, over a range from 10 −3 to 1 µg L −1 . This MOF‐based immunosensor offers insights into highly sensitive dual‐modular responsive material innovations and provides miniaturized biomedical detectors with promising commercialization potentials.
Publisher: Wiley
Date: 24-07-2014
Abstract: Porous titanium dioxide synthesized with a bicontinuous surfactant template is a promising method that leads to a high active surface area electrode. The template used is based on a water/isooctane/dioctyl sodium sulfosuccinate salt together with lecithin. Several parameters were varied during the synthesis to understand and optimize channel formation mechanisms. The material is patterned in stacked conical channels, widening towards the centre of the grains. The active surface area increased by 116 % when the concentration of alkoxide precursors was decreased and increased by 241 % when the template formation temperature was decreased to 10 °C. Increasing the oil phase viscosity tends to widen the pore aperture, thus decreasing the overall active surface area. Changing the phase proportions alters the microemulsion integrity and disrupts channel formation.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM30660C
Publisher: IOP Publishing
Date: 16-04-2014
DOI: 10.1088/1741-2560/11/3/036002
Abstract: Computational methods are increasingly used to optimize transcranial direct current stimulation (tDCS) dose strategies and yet complexities of existing approaches limit their clinical access. Since predictive modelling indicates the relevance of subject athology based data and hence the need for subject specific modelling, the incremental clinical value of increasingly complex modelling methods must be balanced against the computational and clinical time and costs. For ex le, the incorporation of multiple tissue layers and measured diffusion tensor (DTI) based conductivity estimates increase model precision but at the cost of clinical and computational resources. Costs related to such complexities aggregate when considering in idual optimization and the myriad of potential montages. Here, rather than considering if additional details change current-flow prediction, we consider when added complexities influence clinical decisions. Towards developing quantitative and qualitative metrics of value/cost associated with computational model complexity, we considered field distributions generated by two 4 × 1 high-definition montages (m1 = 4 × 1 HD montage with anode at C3 and m2 = 4 × 1 HD montage with anode at C1) and a single conventional (m3 = C3-Fp2) tDCS electrode montage. We evaluated statistical methods, including residual error (RE) and relative difference measure (RDM), to consider the clinical impact and utility of increased complexities, namely the influence of skull, muscle and brain anisotropic conductivities in a volume conductor model. Anisotropy modulated current-flow in a montage and region dependent manner. However, significant statistical changes, produced within montage by anisotropy, did not change qualitative peak and topographic comparisons across montages. Thus for the ex les analysed, clinical decision on which dose to select would not be altered by the omission of anisotropic brain conductivity. Results illustrate the need to rationally balance the role of model complexity, such as anisotropy in detailed current flow analysis versus value in clinical dose design. However, when extending our analysis to include axonal polarization, the results provide presumably clinically meaningful information. Hence the importance of model complexity may be more relevant with cellular level predictions of neuromodulation.
Publisher: Wiley
Date: 08-09-2019
Abstract: Under the double pressures of both the energy crisis and environmental pollution, the exploitation and utilization of hydrogen, a clean and renewable power resource, has become an important trend in the development of sustainable energy-production and energy-consumption systems. In this regard, the electrocatalytic hydrogen evolution reaction (HER) provides an efficient and clean pathway for the mass production of hydrogen fuel and has motivated the design and construction of highly active HER electrocatalysts of an acceptable cost. In particular, graphene-based electrocatalysts commonly exhibit an enhanced HER performance owing to their distinctive structural merits, including a large surface area, high electrical conductivity, and good chemical stability. Considering the rapidly growing research enthusiasm for this topic over the last several years, herein, a panoramic review of recent advances in graphene-based electrocatalysts is presented, covering various advanced synthetic strategies, microstructural characterizations, and the applications of such materials in HER electrocatalysis. Lastly, future perspectives on the challenges and opportunities awaiting this emerging field are proposed and discussed.
Publisher: Springer Science and Business Media LLC
Date: 2002
Publisher: Springer Science and Business Media LLC
Date: 07-12-2016
Publisher: Wiley
Date: 18-09-2013
DOI: 10.1111/JACE.12568
Publisher: IOP Publishing
Date: 23-11-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM02473B
Publisher: Wiley
Date: 26-12-2021
Abstract: Nature offers a variety of interesting structures and intriguing functions for researchers to be learnt for advanced materials innovations. Recently, bioinspired materials have received intensive attention in energy storage applications. Inspired by various natural species, many new configurations and components of energy storage devices, such as rechargeable batteries and supercapacitors, have been designed and innovated. The bioinspired designs on energy devices, such as electrodes and electrolytes, have brought about excellent physical, chemical, and mechanical properties compared to the counterparts at their conventional forms. In this review, the design principles for bioinspired materials ranging from structures, synthesis, and functionalization to multi‐scale ordering and device integration are first discussed, and then a brief summary is given on the recent progress on bioinspired materials for energy storage systems, particularly the widely studied rechargeable batteries and supercapacitors. Finally, a critical review on the current challenges and brief perspective on the future research focuses are proposed. It is expected that this review can offer some insights into the smart energy storage system design by learning from nature.
Publisher: American Chemical Society (ACS)
Date: 10-11-2011
DOI: 10.1021/JA208468D
Abstract: Controlling the morphology and size of titanium dioxide (TiO(2)) nanostructures is crucial to obtain superior photocatalytic, photovoltaic, and electrochemical properties. However, the synthetic techniques for preparing such structures, especially those with complex configurations, still remain a challenge because of the rapid hydrolysis of Ti-containing polymer precursors in aqueous solution. Herein, we report a completely novel approach-three-dimensional (3D) TiO(2) nanostructures with favorable dendritic architectures-through a simple hydrothermal synthesis. The size of the 3D TiO(2) dendrites and the morphology of the constituent nano-units, in the form of nanorods, nanoribbons, and nanowires, are controlled by adjusting the precursor hydrolysis rate and the surfactant aggregation. These novel configurations of TiO(2) nanostructures possess higher surface area and superior electrochemical properties compared to nanoparticles with smooth surfaces. Our findings provide an effective solution for the synthesis of complex TiO(2) nano-architectures, which can pave the way to further improve the energy storage and energy conversion efficiency of TiO(2)-based devices.
Publisher: Springer Science and Business Media LLC
Date: 11-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM31445B
Publisher: Wiley
Date: 20-10-2022
Abstract: Exploring low‐cost and high‐efficient electrocatalyst is an exigent task in developing novel sustainable energy conversion systems, such as fuel cells and electrocatalytic fuel generations. 2D materials, specifically 2D superlattice materials focused here, featured highly accessible active areas, high density of active sites, and high compatibility with property‐complementary materials to form heterostructures with desired synergetic effects, have demonstrated to be promising electrocatalysts for boosting the performance of sustainable energy conversion and storage devices. Nevertheless, the reaction kinetics, and in particular, the functional mechanisms of the 2D superlattice‐based catalysts yet remain ambiguous. In this review, based on the recent progress of 2D superlattice materials in electrocatalysis applications, the rational design and fabrication of 2D superlattices are first summarized and the application of 2D superlattices in electrocatalysis is then specifically discussed. Finally, perspectives on the current challenges and the strategies for the future design of 2D superlattice materials are outlined. This review attempts to establish an intrinsic correlation between the 2D superlattice heterostructures and the catalytic properties, so as to provide some insights into developing high‐performance electrocatalysts for next‐generation sustainable energy conversion and storage.
Publisher: American Chemical Society (ACS)
Date: 13-04-2020
Publisher: Elsevier BV
Date: 02-2017
Publisher: Elsevier BV
Date: 09-2020
Publisher: IOP Publishing
Date: 28-11-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CP52245H
Abstract: A theoretical model is proposed to determine the effects of Si substitution with Al on the oxygen diffusion in apatite-type lanthanum silicates based on density-functional theory (DFT) calculations for La10(SiO4)4(AlO4)2O2. Substitution changes the stable configuration for excess oxygen from the split interstitial to a new cluster form with the original cluster. Al doping completely changes the migration mechanism from the interstitialcy one, which was proposed for the La9.33(SiO4)6O2 starting material, to a mechanism which contains an interstitial process. Nevertheless, the migration barrier is calculated to be 0.81 eV, which indicates small changes in oxygen conduction and is consistent with the observations. The present study indicates that the cation substitution on silicon site alone does not promise the improvement of the oxide ion conduction in the lanthanum silicate.
Publisher: Springer Science and Business Media LLC
Date: 09-2014
DOI: 10.1038/SREP06256
Abstract: Inorganic nano-graphene hybrid materials that are strongly coupled via chemical bonding usually present superior electrochemical performance. However, how the chemical bond forms and the synergistic catalytic mechanism remain fundamental questions. In this study, the chemical bonding of the MoS 2 nanolayer supported on vacancy mediated graphene and the hydrogen evolution reaction of this nanocatalyst system were investigated. An obvious reduction of the metallic state of the MoS 2 nanolayer is noticed as electrons are transferred to form a strong contact with the reduced graphene support. The missing metallic state associated with the unsaturated atoms at the peripheral sites in turn modifies the hydrogen evolution activity. The easiest evolution path is from the Mo edge sites, with the presence of the graphene resulting in a decrease in the energy barrier from 0.17 to 0.11 eV. Evolution of H 2 from the S edge becomes more difficult due to an increase in the energy barrier from 0.43 to 0.84 eV. The clarification of the chemical bonding and catalytic mechanisms for hydrogen evolution using this strongly coupled MoS 2 /graphene nanocatalyst provide a valuable source of reference and motivation for further investigation for improved hydrogen evolution using chemically active nanocoupled systems.
Publisher: Wiley
Date: 22-11-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA14934J
Publisher: Wiley
Date: 04-05-2020
Publisher: Springer Science and Business Media LLC
Date: 03-06-2015
DOI: 10.1038/SREP10908
Abstract: Silicon batteries have attracted much attention in recent years due to their high theoretical capacity, although a rapid capacity fade is normally observed, attributed mainly to volume expansion during lithiation. Here, we report for the first time successful synthesis of Si/void/SiO 2 /void/C nanostructures. The synthesis strategy only involves selective etching of SiO 2 in Si/SiO 2 /C structures with hydrofluoric acid solution. Compared with reported results, such novel structures include a hard SiO 2 -coated layer, a conductive carbon-coated layer and two internal void spaces. In the structures, the carbon can enhance conductivity, the SiO 2 layer has mechanically strong qualities and the two internal void spaces can confine and accommodate volume expansion of silicon during lithiation. Therefore, these specially designed dual yolk-shell structures exhibit a stable and high capacity of 956 mA h g −1 after 430 cycles with capacity retention of 83%, while the capacity of Si/C core-shell structures rapidly decreases in the first ten cycles under the same experimental conditions. The novel dual yolk-shell structures developed for Si can also be extended to other battery materials that undergo large volume changes.
Publisher: Wiley
Date: 26-09-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7RA10696C
Abstract: A photoelectric system is capable of simultaneous atomic-level visualization and pico- ere-precision.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CP50654A
Abstract: First-principles computational studies indicate that (B, N, or O)-doped graphene ribbon edges can substantially reduce the energy barrier for H2 dissociative adsorption. The low barrier is competitive with many widely used metal or metal oxide catalysts. This suggests that suitably functionalized graphene architectures are promising metal-free alternatives for low-cost catalytic processes.
Publisher: MDPI AG
Date: 21-07-2023
DOI: 10.3390/NANO13142122
Abstract: The hydrogen evolution reaction (HER) is a remarkable mechanism which yields the production of hydrogen through a process of water electrolysis. However, the evolution of hydrogen requires highly conductive and stable catalysts, such as the noble metal platinum (Pt). However, the problem lies in the limitations that this catalyst and others of its kind present. Due to limited availability, as well as the costs involved in acquiring such catalysts, researchers are challenged to manufacture catalysts that do not present these limitations. Carbon nanotubes (CNTs), which are nanomaterials, are known to have a wide range of applications. However, specifically, the pristine carbon nanotube is not suitable for the HER due to the binding free energy of its positive H-atoms. Hence, for the first time, we demonstrated the use of the proposed aryl-functionalised catalysts, i.e., Aryl-L@SWCNT (L = Br, CCH, Cl, CO2CH3, F, I, NO2, or t-butyl), along with the effect of the sp2–sp3 hybridised interface through the density functional theory (DFT). We performed calculations of single-walled carbon nanotubes with multiple aryl functional groups. By employing the DFT calculations, we proved that the curvature of the nanotubes along with the proposed aryl-functionalised catalysts had a noteworthy effect on the performance of the HER. Our study opens the door to investigating a promising group of catalysts for sustainable hydrogen production.
Publisher: Wiley
Date: 21-04-2020
Publisher: Wiley
Date: 2013
DOI: 10.1118/1.4771963
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2CC37212F
Abstract: Morphology-controlled bilayer TiO(2) nanostructures consisting of one-dimensional (1D) nanowire bottom arrays and a three-dimensional (3D) dendritic microsphere top layer were synthesized via a one-step hydrothermal method. These novel 1D-3D bilayer photoanodes demonstrated the highest energy conversion efficiency of 7.2% for rutile TiO(2) dye-sensitized solar cells to date, with TiCl(4) post-treatment.
Publisher: American Chemical Society (ACS)
Date: 07-08-2019
Publisher: Wiley
Date: 22-02-2021
Publisher: Wiley
Date: 24-03-2010
Publisher: Oxford University Press (OUP)
Date: 21-07-2017
DOI: 10.1093/NSR/NWX077
Abstract: 2D nanomaterials, including graphene, transition metal oxide (TMO) nanosheets, transition metal dichalcogenide (TMD) nanosheets, etc., have offered an appealing and unprecedented opportunity for the development of high-performance electrode materials for lithium-ion batteries (LIBs). Although significant progress has been made on 2D nanomaterials for LIB applications in the recent years, some major challenges still exist for the direct use of these sheet-like nanomaterials, such as their serious self-agglomerating tendency during electrode fabrication and low conductivity as well as the large volume changes over repeated charging–discharging cycles for most TMOs/TMDs, which have resulted in large irreversible capacity, low initial Coulombic efficiency and fast capacity fading. To address these issues, considerable progress has been made in the exploitation of 2D nanosheets for enhanced lithium storage. In this review, we intend to summarize the recent progress on the strategies for enhancing the lithium-storage performance of 2D nanomaterials, including hybridization with conductive materials, surface/edge functionalization and structural optimization. These strategies for manipulating the structures and properties of 2D nanomaterials are expected to meet the grand challenges for advanced nanomaterials in clean energy applications and thus provide access to exciting materials for achieving high-performance next-generation energy-storage devices.
Publisher: American Chemical Society (ACS)
Date: 25-01-2018
Abstract: Graphene-like nanomaterials have received tremendous research interest due to their atomic thickness and fascinating properties. Previous studies mainly focus on the modulation of their electronic structures, which undoubtedly optimizes the electronic properties, but is not the only determinant of performance in practical applications. Herein, we propose a generalized strategy to incrementally manipulate the architectures of several atomically thin transition metal (hydr)oxides, and study their effects on catalytic water oxidation. The results demonstrate the obvious superiority of a wrinkled nanosheet architecture in both catalytic activity and durability. For instance, wrinkled Ni(OH)
Publisher: Wiley
Date: 08-07-2022
Abstract: 2D tin diselenide and its derived 2D heterostructures have delivered promising potentials in various applications ranging from electronics to energy storage devices. The major challenges associated with large‐scale fabrication of SnSe 2 crystals, however, have hindered its engineering applications. Herein, a tin‐extraction synthetic method is proposed for producing large‐size SnSe 2 bulk crystals. In a typical synthesis, a Sn‐containing MAX phase (V 2 SnC) and a Se source are heat‐treated under a reducing atmosphere, by which Sn is extracted from the V 2 SnC phase as a rectified Sn source to form SnSe 2 crystals in the cold zone. After the following liquid exfoliation, the obtained 2D SnSe 2 nanosheets have a lateral size of a few centimeters and an atomic thickness. Furthermore, by coupling with 2D graphene to form 2D/2D SnSe 2 /graphene heterostructured electrodes, as validated by theoretical calculation and experimental studies, the superior Li‐/Na‐ion storage performance with ultralow surface/interface ion transport barriers are achieved for rechargeable Li‐/Na‐ion batteries. This innovative synthetic strategy opens a new avenue for the large‐scale synthesis of selenides and offers more options into the practical application of emerging 2D/2D heterostructure for electrochemical energy storage.
Publisher: Elsevier BV
Date: 09-2020
Publisher: Wiley
Date: 24-03-2022
Abstract: The development of highly efficient and stable oxygen reduction electrocatalysts and revealing their underlying catalytic mechanism are crucial in expanding the applications of metal‐air batteries. Herein, an excellent FeCo alloy nanoparticles (NPs)‐decorated N‐doped mesoporous carbon electrocatalyst (FeCo/NC) for oxygen reduction reaction, prepared through the pyrolysis of a dual metal containing metal‐organic framework composite scaffold is reported. Benefiting from the highly exposed bimetal active sites and the carefully designed structure, the Fe 0.25 Co 0.75 /NC‐800 catalyst exhibits a promising electrocatalytic activity and a superior durability, better than those of the state‐of‐the‐art catalysts. Suggested by both the X‐ray absorption fine structures and the density functional theoretical calculation, the outstanding catalytic performance is originated from the synergistic effects of the bimetallic loading in NC catalysts, where the electronic modulation of the Co active sites from the nearby Fe species leads to an optimized binding strength for reaction intermediates. This work demonstrates a class of highly active nonprecious metals electrocatalysts and provides valuable insights into investigating the structure–performance relationship of transition metal‐based alloy catalysts.
Publisher: Elsevier BV
Date: 09-2020
Publisher: Wiley
Date: 08-2021
Publisher: Wiley
Date: 26-06-2007
Publisher: American Chemical Society (ACS)
Date: 20-07-2023
Publisher: Springer Science and Business Media LLC
Date: 13-07-2023
DOI: 10.1038/S41467-023-39157-2
Abstract: Multimetallic alloys (MMAs) with various compositions enrich the materials library with increasing ersity and have received much attention in catalysis applications. However, precisely shaping MMAs in mesoporous nanostructures and mapping the distributions of multiple elements remain big challenge due to the different reduction kinetics of various metal precursors and the complexity of crystal growth. Here we design a one-pot wet-chemical reduction approach to synthesize core–shell motif PtPdRhRuCu mesoporous nanospheres (PtPdRhRuCu MMNs) using a diblock copolymer as the soft template. The PtPdRhRuCu MMNs feature adjustable compositions and exposed porous structures rich in highly entropic alloy sites. The formation processes of the mesoporous structures and the reduction and growth kinetics of different metal precursors of PtPdRhRuCu MMNs are revealed. The PtPdRhRuCu MMNs exhibit robust electrocatalytic hydrogen evolution reaction (HER) activities and low overpotentials of 10, 13, and 28 mV at a current density of 10 mA cm −2 in alkaline (1.0 M KOH), acidic (0.5 M H 2 SO 4 ), and neutral (1.0 M phosphate buffer solution (PBS)) electrolytes, respectively. The accelerated kinetics of the HER in PtPdRhRuCu MMNs are derived from multiple compositions with synergistic interactions among various metal sites and mesoporous structures with excellent mass/electron transportation characteristics.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CS00418D
Abstract: The research progress of atomically thin non-layered nanomaterials on energy storage and conversion applications is reviewed in this work.
Publisher: Wiley
Date: 03-08-2023
Abstract: The atom‐cluster interaction has recently been exploited as an effective way to increase the performance of metal‐nitrogen‐carbon catalysts for oxygen reduction reaction (ORR). However, the rational design of such catalysts and understanding their structure‐property correlations remain a great challenge. Herein, we demonstrate that the introduction of adjacent metal (M)−N 4 single atoms (SAs) could significantly improve the ORR performance of a well‐screened Fe atomic cluster (AC) catalyst by combining density functional theory (DFT) calculations and experimental analysis. The DFT studies suggest that the Cu−N 4 SAs act as a modulator to assist the O 2 adsorption and cleavage of O−O bond on the Fe AC active center, as well as optimize the release of OH* intermediates to accelerate the whole ORR kinetic. The depositing of Fe AC with Cu−N 4 SAs on nitrogen doped mesoporous carbon nanosheet are then constructed through a universal interfacial monomicelles assembly strategy. Consistent with theoretical predictions, the resultant catalyst exhibits an outstanding ORR performance with a half‐wave potential of 0.92 eV in alkali and 0.80 eV in acid, as well as a high power density of 214.8 mW cm −2 in zinc air battery. This work provides a novel strategy for precisely tuning the atomically dispersed poly‐metallic centers for electrocatalysis.
Publisher: Springer Science and Business Media LLC
Date: 13-11-2014
DOI: 10.1038/SREP07030
Publisher: Springer Science and Business Media LLC
Date: 12-07-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0EE00353K
Publisher: Informa UK Limited
Date: 07-2014
Publisher: Elsevier BV
Date: 03-2019
Publisher: Wiley
Date: 25-01-2016
Publisher: Elsevier BV
Date: 03-2017
Publisher: Wiley
Date: 10-04-2017
Abstract: The exponential increase in research focused on two-dimensional (2D) metal oxides has offered an unprecedented opportunity for their use in energy conversion and storage devices, especially for promising next-generation rechargeable batteries, such as lithium-ion batteries (LIBs) and sodium-ion batteries (NIBs), as well as some post-lithium batteries, including lithium-sulfur batteries, lithium-air batteries, etc. The introduction of well-designed 2D metal oxide nanomaterials into next-generation rechargeable batteries has significantly enhanced the performance of these energy-storage devices by providing higher chemically active interfaces, shortened ion-diffusion lengths, and improved in-plane carrier-/charge-transport kinetics, which have greatly promoted the development of nanotechnology and the practical application of rechargeable batteries. Here, the recent progress in the application of 2D metal oxide nanomaterials in a series of rechargeable LIBs, NIBs, and other post lithium-ion batteries is reviewed relatively comprehensively. Current opportunities and future challenges for the application of 2D nanomaterials in energy-storage devices to achieve high energy density, high power density, stable cyclability, etc. are summarized and outlined. It is believed that the integration of 2D metal oxide nanomaterials in these clean energy devices offers great opportunities to address challenges driven by increasing global energy demands.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6NR07271B
Abstract: Recent reports of successful synthesis of atomically thin boron films have raised great prospects of discovering novel electronic and transport properties in a new type of 2D materials. Here we show by first-principles calculations that monolayer and bilayer γ-B
Publisher: Wiley
Date: 07-04-2014
Abstract: Thermally stable mesoporous TiO2/SiO2 hybrid films with pore size of 50 nm have been synthesized by adopting the polymeric micelle-assembly method. A triblock copolymer, poly(styrene-b-2-vinyl pyridine-b-ethylene oxide), which serves as a template for the mesopores, was utilized to form polymeric micelles. The effective interaction of titanium tetraisopropoxide (TTIP) and tetraethyl orthosilicate (TEOS) with the polymeric micelles enabled us to fabricate stable mesoporous films. By changing the molar ratio of TEOS and TTIP, several mesoporous TiO2/SiO2 hybrid films with different compositions can be synthesized. The presence of amorphous SiO2 phase effectively retards the growth of anatase TiO2 crystal in the pore walls and retains the original mesoporous structure, even at higher temperature (650 °C). These TiO2/SiO2 hybrid films are of very high quality, without any cracks or voids. The addition of SiO2 phase to mesoporous TiO2 films not only adsorbs more organic dyes, but also significantly enhances the photocatalytic activity compared to mesoporous pure TiO2 film without SiO2 phase.
Publisher: IOP Publishing
Date: 22-05-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NA00284D
Abstract: Three-point bending tests of a pristine rutile TiO 2 NW.
Publisher: AIP Publishing
Date: 09-2013
DOI: 10.1063/1.4820425
Abstract: One-dimensional (1D) TiO2 nanostructures are very desirable for providing fascinating properties and features, such as high electron mobility, quantum confinement effects, and high specific surface area. Herein, 1D mesoporous TiO2 nanofibres were prepared using the electrospinning method to verify their potential for use as the photoelectrode of dye-sensitized solar cells (DSSCs). The 1D mesoporous nanofibres, 300 nm in diameter and 10-20 μm in length, were aggregated from anatase nanoparticles 20-30 nm in size. The employment of these novel 1D mesoporous nanofibres significantly improved dye loading and light scattering of the DSSC photoanode, and resulted in conversion cell efficiency of 8.14%, corresponding to an ∼35% enhancement over the Degussa P25 reference photoanode.
Publisher: Wiley
Date: 28-02-2018
Publisher: Springer Science and Business Media LLC
Date: 22-04-2021
DOI: 10.1007/S40820-021-00623-5
Abstract: Unique “Janus” interfacial assemble strategy of 2D MXene nanosheets was proposed firstly. Ternary heterostructure consisting of high capacity transitional metal chalcogenide, high conductive 2D MXene and N rich fungal carbonaceous matrix was achieved for larger radius Na/K ions storages. The highly accessible surfaces and interfaces of the strongly coupled 2D based ternary heterostructures provide superb surficial pseudocapacitive storages for both Na and K ions with low energy barriers was verified. Combining with the advantages of two-dimensional (2D) nanomaterials, MXenes have shown great potential in next generation rechargeable batteries. Similar with other 2D materials, MXenes generally suffer severe self-agglomeration, low capacity, and unsatisfied durability, particularly for larger sodium otassium ions, compromising their practical values. In this work, a novel ternary heterostructure self-assembled from transition metal selenides (MSe, M = Cu, Ni, and Co), MXene nanosheets and N-rich carbonaceous nanoribbons (CNRibs) with ultrafast ion transport properties is designed for sluggish sodium-ion (SIB) and potassium-ion (PIB) batteries. Benefiting from the erse chemical characteristics, the positively charged MSe anchored onto the electronegative hydroxy (–OH) functionalized MXene surfaces through electrostatic adsorption, while the fungal-derived CNRibs bonded with the other side of MXene through amino bridging and hydrogen bonds. This unique MXene-based heterostructure prevents the restacking of 2D materials, increases the intrinsic conductivity, and most importantly, provides ultrafast interfacial ion transport pathways and extra surficial and interfacial storage sites, and thus, boosts the high-rate storage performances in SIB and PIB applications. Both the quantitatively kinetic analysis and the density functional theory (DFT) calculations revealed that the interfacial ion transport is several orders higher than that of the pristine MXenes, which delivered much enhanced Na + (536.3 mAh g −1 @ 0.1 A g −1 ) and K + (305.6 mAh g −1 @ 1.0 A g −1 ) storage capabilities and excellent long-term cycling stability. Therefore, this work provides new insights into 2D materials engineering and low-cost, but kinetically sluggish post-Li batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA02341A
Abstract: Local crystallinity, accelerating the reaction kinetics, has been confirmed to afford enhanced OER performance. Herein, we established the relationship between the amorphization rate and the catalytic activity of 2D α-Ni(OH) 2 nanomesh through Fe doping.
Publisher: Springer Berlin Heidelberg
Date: 10-08-2017
Publisher: American Chemical Society (ACS)
Date: 17-01-2017
Abstract: The tunnel-structured Na
Publisher: American Chemical Society (ACS)
Date: 24-07-2018
Publisher: Wiley
Date: 22-05-2201
Publisher: Springer Science and Business Media LLC
Date: 06-2006
Abstract: In this article, a novel pressureless solid-liquid reaction method is presented for preparation of yttrium disilicate (γ-Y 2 Si 2 O 7 ). Single-phase γ-Y 2 Si 2 O 7 powder was synthesized by calcination of SiO 2 and Y 2 O 3 powders with the addition of LiYO 2 at 1400 °C for 4 h. The addition of LiYO 2 significantly decreased the synthesis temperature, shortened the calcination time, and enhanced the stability of γ-Y 2 Si 2 O 7 . The sintering of these powders in air and O 2 was studied by means of thermal mechanical analyzer. It is shown that the γ-Y 2 Si 2 O 7 sintered in oxygen had a faster densification rate and a higher density than that sintered in air. Furthermore, single-phase γ-Y 2 Si 2 O 7 with a density of 4.0 g/cm 3 (99% of the theoretical density) was obtained by pressureless sintering at 1400 °C for 2 h in oxygen. Microstructures of the sintered s les are studied by scanning electron microscope.
Publisher: Elsevier BV
Date: 10-2020
Publisher: Springer Science and Business Media LLC
Date: 31-07-2013
Publisher: Elsevier BV
Date: 2023
Publisher: Elsevier BV
Date: 07-2022
Publisher: Thomas Telford Ltd.
Date: 11-2022
Abstract: The electrocatalytic two-electron oxygen reduction reaction is an effective, safe and green approach to producing hydrogen peroxide, and ‘catalyst design’ for highly efficient hydrogen peroxide production has already been reported in various works. Specially, the modification of existing catalysts for two-electron oxygen reduction reaction through surface/interface engineering has huge potential to enhance further the catalytic performance of the catalysts. Moreover, a detailed overview on the research progress of carbon-based electrocatalysts through surface/interface engineering and their intrinsic reaction mechanism is helpful in realizing a comprehensive and systematic understanding of the latest progress in this field and further achieving highly efficient hydrogen peroxide electrosynthesis. Herein, fundamental aspects of the 2e − /4e − pathways of the oxygen reduction reaction are first introduced. Subsequently, a comprehensive summary of the current strategies for carbon-based catalyst modification through surface/interface engineering for high selectivity and yield of hydrogen peroxide production is presented. Finally, the prospects and challenges of hydrogen peroxide production with high efficiency and yield rate are presented, which should shed light on the industrial production and application of hydrogen peroxide.
Publisher: AIP Publishing
Date: 17-07-2014
DOI: 10.1063/1.4890506
Abstract: Magnetic nanoparticles have attracted increasing attention for biomedical applications in magnetic resonance imaging, high frequency magnetic field hyperthermia therapies, and magnetic-field-gradient-targeted drug delivery. In this study, three-dimensional (3D) platinum nanostructures with large surface area that features magnetic behavior have been demonstrated. The well-developed 3D nanodendrites consist of plentiful interconnected nano-arms ∼4 nm in size. The magnetic behavior of the 3D dendritic Pt nanoparticles is contributed by the localization of surface electrons due to strongly bonded oxygen/Pluronic F127 and the local magnetic moment induced by oxygen vacancies on the neighboring Pt and O atoms. The magnetization of the nanoparticles exhibits a mixed paramagnetic and ferromagnetic state, originating from the core and surface, respectively. The 3D nanodendrite structure is suitable for surface modification and high amounts of drug loading if the transition temperature was enhanced to room temperature properly.
Publisher: Wiley
Date: 26-02-2018
Publisher: American Chemical Society (ACS)
Date: 23-10-2015
Abstract: Sodium-ion batteries (SIBs) are considered as complementary alternatives to lithium-ion batteries for grid energy storage due to the abundance of sodium. However, low capacity, poor rate capability, and cycling stability of existing anodes significantly hinder the practical applications of SIBs. Herein, ultrathin two-dimensional SnS2 nanosheets (3-4 nm in thickness) are synthesized via a facile refluxing process toward enhanced sodium storage. The SnS2 nanosheets exhibit a high apparent diffusion coefficient of Na(+) and fast sodiation/desodiation reaction kinetics. In half-cells, the nanosheets deliver a high reversible capacity of 733 mAh g(-1) at 0.1 A g(-1), which still remains up to 435 mAh g(-1) at 2 A g(-1). The cell has a high capacity retention of 647 mA h g(-1) during the 50th cycle at 0.1 A g(-1), which is by far the best for SnS2, suggesting that nanosheet morphology is beneficial to improve cycling stability in addition to rate capability. The SnS2 nanosheets also show encouraging performance in a full cell with a Na3V2(PO4)3 cathode. In addition, the sodium storage mechanism is investigated by ex situ XRD coupled with high-resolution TEM. The high specific capacity, good rate capability, and cycling durability suggest that SnS2 nanosheets have great potential working as anodes for high-performance SIBs.
Publisher: Springer Science and Business Media LLC
Date: 12-2015
DOI: 10.1038/AM.2015.133
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CP01470B
Abstract: A novel sintering additive based on LiNO(3) was used to overcome the drawbacks of poor sinterability and low grain boundary conductivity in BaZr(0.8)Y(0.2)O(3-δ) (BZY20) protonic conductors. The Li-additive totally evaporated during the sintering process at 1600 °C for 6 h, which led to highly dense BZY20 pellets (96.5% of the theoretical value). The proton conductivity values of BZY20 with Li sintering-aid were significantly larger than the values reported for BZY sintered with other metal oxides, due to the fast proton transport in the "clean" grain boundaries and grain interior. The total conductivity of BZY20-Li in wet Ar was 4.45 × 10(-3) S cm(-1) at 600 °C. Based on the improved sinterability, anode-supported fuel cells with 25 μm-thick BZY20-Li electrolyte membranes were fabricated by a co-firing technique. The peak power density obtained at 700 °C for a BZY-Ni/BZY20-Li/La(0.6)Sr(0.4)Co(0.2)Fe(0.8)O(3-δ) (LSCF)-BZY cell was 53 mW cm(-2), which is significantly larger than the values reported for fuel cells using electrolytes made of BZY sintered with the addition of ZnO and CuO, confirming the advantage of using Li as a sintering aid.
Publisher: Springer Science and Business Media LLC
Date: 26-08-2019
DOI: 10.1038/S41565-019-0526-7
Abstract: Quantum dot (QD) photovoltaic devices are attractive for their low-cost synthesis, tunable band gap and potentially high power conversion efficiency (PCE). However, the experimentally achieved efficiency to date remains far from ideal. Here, we report an in-situ fabrication and investigation of single TiO
Publisher: Wiley
Date: 06-2022
Abstract: Nature is a substantial repository for various kinds of aquatic, terrestrial, and wind‐borne plants and animals adapting extensively to sustain life on earth's different environmental conditions. The organisms or structures of these natural creatures possess extraordinary properties or functionalities through well‐organizing usually weak biopolymers and bioinorganic structures, which provide good ex les to emulate their mechanical and structural characteristics in materials innovations and discoveries. This review collectively investigates the studies of the structures and mechanical properties of some representative fauna and flora with robust mechanical properties and the corresponding bioinspired materials with mimicking structures and mechanical properties. By learning from the natural structures with robust mechanical properties, bioinspired materials and composites with superior mechanical performance to the constituent materials have been designed and fabricated. Via this study, there is hope to draw some principles for designing innovative materials with extraordinary properties from existing common materials by learning from nature. It is expected that the understanding of the extraordinary natural mechanical properties and the robust bioinspired materials can provide some insights into the design of novel materials and composites.
Publisher: American Chemical Society (ACS)
Date: 18-12-2019
Abstract: Water splitting is a sustainable approach for production of hydrogen to fuel some clean energy technologies. This process, unfortunately, has been significantly impeded by the puzzles in either the efficient but economically unaffordable noble-metal-based catalysts or the low-cost but kinetically sluggish abundant-element-based catalysts. Particularly, the discovery of efficient bifunctional catalysts that can simultaneously trigger the reactions of both anode and cathode for overall water splitting still remains as a grand challenge. Herein, a novel low-cost bifunctional Ni
Publisher: Wiley
Date: 21-02-2022
Publisher: Wiley
Date: 24-05-2021
Abstract: Interlayer transport of charges and carriers of 2D nanomaterials is a critical parameter that governs the material and device performance in energy storage applications. Inspired by multilevel natural bamboo‐membrane with ultrafast water and electrolyte transport properties to support its super‐rapid growth rate, 2D–2D multilevel heterostructured graphene‐based membranes with tailored gradient interlayer channels are rationally designed for achieving ultrafast interlayer ion transport. The bioinspired heterostructured membranes possess multilevel interlayer spacing distributions, where the closely packed layers with sub‐nanosized interlayer space provide ultrafast confined interlayer ion transport, while the loosely stacked outer layers consisting of open channels with large distances up to few micrometres are favorable for rapid wetting and penetration of liquid electrolytes. The combination of advantages of large‐size open channels and nanosized confined channels offers ultrafast electrolyte wetting and permeation and interlayer ion transport and provide the devices with superior volumetric capacity as free‐standing electrodes for rechargeable batteries.
Publisher: Wiley
Date: 02-07-2019
Abstract: The increasing demand for constructing ecological civilization and promoting socially sustainable development has encouraged scientists to develop bioinspired materials with required properties and functions. By bringing science and nature together, plenty of novel materials with extraordinary properties can be created by learning the best from natural species. In combination with the exceptional features of 2D nanomaterials, bioinspired 2D nanomaterials and technologies have delivered significant achievements. Here, the progress over the past decade in bioinspired 2D photonic structures, energy nanomaterials, and superwetting materials, is summarized, together with the challenges and opportunities in developing bioinspired materials for sustainable energy and environmental technologies.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR05523A
Abstract: We report the critical thickness of a surface-functionalized coating for enhanced lithium storage.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA01162K
Abstract: In this highlight, we proposed the concept of two-step self-assembly approach for the synthesis of hierarchically-ordered multifunctional nanostructures.
Publisher: Springer Science and Business Media LLC
Date: 11-03-2052
DOI: 10.1038/SREP08987
Abstract: Modulation of material physical and chemical properties through selective surface engineering is currently one of the most active research fields, aimed at optimizing functional performance for applications. The activity of exposed crystal planes determines the catalytic, sensory, photocatalytic and electrochemical behavior of a material. In the research on nanomagnets, it opens up new perspectives in the fields of nanoelectronics, spintronics and quantum computation. Herein, we demonstrate controllable magnetic modulation of α-MnO 2 nanowires, which displayed surface ferromagnetism or antiferromagnetism, depending on the exposed plane. First-principles density functional theory calculations confirm that both Mn- and O-terminated α-MnO 2 (1 1 0) surfaces exhibit ferromagnetic ordering. The investigation of surface-controlled magnetic particles will lead to significant progress in our fundamental understanding of functional aspects of magnetism on the nanoscale, facilitating rational design of nanomagnets. Moreover, we approved that the facet engineering pave the way on designing semiconductors possessing unique properties for novel energy applications, owing to that the bandgap and the electronic transport of the semiconductor can be tailored via exposed surface modulations.
Publisher: Wiley
Date: 18-06-2010
Publisher: Wiley
Date: 09-2022
Publisher: American Chemical Society (ACS)
Date: 15-10-2019
DOI: 10.1021/ACS.NANOLETT.9B02685
Abstract: It is challenging but important to understand the mechanical properties of one-dimensional (1D) nanomaterials for their design and integration into nanodevices. Generally, brittle ceramic nanowires (NWs) cannot withstand a large bending strain. Herein,
Publisher: Wiley
Date: 03-12-2021
Abstract: It has been well recognized that the surface reconstruction of electrocatalysts at the initial stage in the form of phase transitions, defect migrations, valence regulations, etc., plays a critical role in generating real, surface active catalytic centers and achieving steady surface reactions. It is also expected that a low activation energy barrier for initiating surface reconstruction is crucial for rapid and stable electrochemical catalysis. Despite this, the surface reconstruction kinetics and their effects on catalytic reactions have been rarely investigated. Herein, using phase modulated polymorphic cobalt‐based catalysts with tailorable nitrogen‐metal bonds through a cationic molybdenum‐substitution strategy, real‐time X‐ray photoelectron spectroscopy (XPS) structural monitoring of the surface chemical state evolution during the catalytic reaction is performed to track the initial surface reconstruction kinetics during the alkaline oxygen evolution reaction (OER). It is concluded that the molybdenum‐modulated cobalt‐based nanocatalyst can be tuned with favorable initial surface reconstruction and stabilized active centers to reach optimized OER catalysis, accompanied by a low onset overpotential of only 210 mV and a favorable overpotential at 10 mA cm –2 of 290 mV, outperforming the commercial, noble‐metallic RuO 2 catalyst. This study thus provides new conceptual insights into rationally regulating the initial surface reconstruction kinetics for high‐performance electrocatalysis reactions.
Publisher: Wiley
Date: 23-06-2020
Publisher: American Chemical Society (ACS)
Date: 27-02-2017
Abstract: Low solar energy harvesting and conversion efficiency has become a major problem in solar energy science and engineering owing to the difficulty in capturing solar energy across the wide solar spectrum, especially in the visible light range. Inspired by the extraordinary properties of materials arising from decreased dimensions, in this study, we explore a nanocontact system formed by a two-dimensional (2D) TiO
Publisher: American Chemical Society (ACS)
Date: 29-06-2018
DOI: 10.1021/JACS.8B04599
Abstract: Metal-organic frameworks (MOFs) combining the merits of both organic and inorganic functional building structures are fundamentally important and can meet the requirement of vast scientific and technological applications. Intrigued from the fact that transition metals (TMs) are widely embedded in the carbon sp
Publisher: Springer International Publishing
Date: 2020
Publisher: Wiley
Date: 31-12-2021
Publisher: Elsevier BV
Date: 12-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR02082A
Abstract: Layered sodium titanate nanowires exhibit ultra-large bending strain, which is accompanied by dislocation motion.
Publisher: Wiley
Date: 06-05-2021
Abstract: Earth‐abundant and environmentally friendly aluminosilicate minerals can be one of the promising alternatives to develop cost‐effective energy conversion and storage devices. Herein, in situ growth of transition metal nanoparticles is proposed to modify two commonly available feldspar minerals, albite and microcline, for promoting electrocatalytic oxygen evolution reaction activity via a one‐step thermal reduction strategy. Three types of transition metal nanoparticles, namely, Ni, Co, and Fe, are selected to modify the albite or microcline surfaces. As expected, these modified products deliver enhanced catalytic activities compared to the pristine minerals. Particularly, Co‐modified microcline (C‐KASO) demonstrates the best performance that even outperforms the commercial RuO 2 catalyst. This design by coupling low‐cost aluminosilicate minerals with active transition metal nanoparticles offers a new insight into directly utilizing the natural abundant resources to address the current energy crisis.
Publisher: Wiley
Date: 27-11-2019
Abstract: Present mobile devices, transportation tools, and renewable energy technologies are more dependent on newly developed battery chemistries than ever before. Intrinsic properties, such as safety, high energy density, and cheapness, are the main objectives of rechargeable batteries that have driven their overall technological progress over the past several decades. Unfortunately, it is extremely hard to achieve all these merits simultaneously at present. Alternatively, exploration of the most suitable batteries to meet the specific requirements of an in idual application tends to be a more reasonable and easier choice now and in the near future. Based on this concept, here, a range of promising alternatives to lithium-sulfur batteries that are constructed with non-Li metal anodes (e.g., Na, K, Mg, Ca, and Al) and sulfur cathodes are discussed. The systems governed by these new chemistries offer high versatility in meeting the specific requirements of various applications, which is directly linked with the broad choice in battery chemistries, materials, and systems. Herein, the operating principles, materials, and remaining issues for each targeted battery characteristics are comprehensively reviewed. By doing so, it is hoped that their design strategies are illustrated and light is shed on the future exploration of new metal-sulfur batteries and advanced materials.
Publisher: American Chemical Society (ACS)
Date: 14-04-2017
DOI: 10.1021/ACS.JPCLETT.7B00222
Abstract: Two-dimensional topological insulators (2D TIs) are a remarkable class of atomically thin layered materials that exhibit unique symmetry-protected helical metallic edge states with an insulating interior. Recent years have seen a tremendous surge in research of this intriguing new state of quantum matter. In this Perspective, we summarize major milestones and the most significant progress in the latest developments of material discovery and property characterization in 2D TI research. We categorize the large number and rich variety of theoretically proposed 2D TIs based on the distinct mechanisms of topological phase transitions, and we systematically analyze and compare their structural, chemical, and physical characteristics. We assess the current status and challenges of experimental synthesis and potential device applications of 2D TIs and discuss prospects of exciting new opportunities for future research and development of this fascinating class of materials.
Publisher: Wiley
Date: 07-03-2014
Publisher: Elsevier BV
Date: 10-2016
Publisher: Springer Science and Business Media LLC
Date: 09-12-2014
DOI: 10.1038/SREP07384
Publisher: Wiley
Date: 02-04-2014
Abstract: One-dimensional nanomaterials have short Li(+) diffusion paths and promising structural stability, which results in a long cycle life during Li(+) insertion and extraction processes in lithium rechargeable batteries. In this study, we fabricated one-dimensional spinel Li4Ti5O12 (LTO) nanofibers using an electrospinning technique and studied the Zr(4+) doping effect on the lattice, electronic structure, and resultant electrochemical properties of Li-ion batteries (LIBs). Accommodating a small fraction of Zr(4+) ions in the Ti(4+) sites of the LTO structure gave rise to enhanced LIB performance, which was due to structural distortion through an increase in the average lattice constant and thereby enlarged Li(+) diffusion paths rather than changes to the electronic structure. Insulating ZrO2 nanoparticles present between the LTO grains due to the low Zr(4+) solubility had a negative effect on the Li(+) extraction capacity, however. These results could provide key design elements for LTO anodes based on atomic level insights that can pave the way to an optimal protocol to achieve particular functionalities.
Publisher: Springer Science and Business Media LLC
Date: 12-04-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CP02788C
Abstract: Due to their unique reversible polarization, 2D ferroelectrics are promising for nanodevice applications in ferroelectric field effect transistors, diodes and tunnel junctions.
Publisher: The Electrochemical Society
Date: 28-12-2017
DOI: 10.1149/2.1011702JES
Publisher: Wiley
Date: 06-05-2013
DOI: 10.1111/JACE.12371
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TC31649A
Publisher: Springer Science and Business Media LLC
Date: 29-08-2014
DOI: 10.1038/SREP05769
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 2008
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 05-2011
DOI: 10.2514/1.38391
Publisher: Elsevier BV
Date: 03-2009
Publisher: American Chemical Society (ACS)
Date: 17-04-2020
Start Date: 2018
End Date: 2021
Funder: Australian Research Council
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Funder: Australian Research Council
View Funded ActivityStart Date: 2020
End Date: 2022
Funder: Australian Research Council
View Funded ActivityStart Date: 2022
End Date: 2025
Funder: Australian Research Council
View Funded ActivityStart Date: 04-2020
End Date: 12-2024
Amount: $330,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2015
End Date: 06-2018
Amount: $373,536.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2010
End Date: 12-2013
Amount: $300,182.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2016
End Date: 04-2020
Amount: $610,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2019
End Date: 08-2023
Amount: $898,125.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2023
End Date: 12-2023
Amount: $495,500.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2023
End Date: 12-2025
Amount: $396,654.00
Funder: Australian Research Council
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