ORCID Profile
0000-0002-4008-2536
Current Organisations
Nanjing University of Science and Technology
,
University of Adelaide
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Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA04684K
Abstract: Necklace-like nanochains composed of molybdenum nitride embedded N-doped carbon for efficient all pH hydrogen evolution.
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 11-2015
Publisher: American Chemical Society (ACS)
Date: 04-08-2022
DOI: 10.1021/JACS.2C06820
Abstract: An ere-level current density of CO
Publisher: American Chemical Society (ACS)
Date: 07-08-2015
Publisher: Wiley
Date: 08-02-2014
Abstract: A three-dimensional (3D) electrode composed of nitrogen, oxygen dualdoped graphene-carbon nanotube hydrogel film is fabricated, which greatly favors the transport and access of gas and reaction intermediates, and shows a remarkable oxygen-evolution catalytic performance in both alkaline and acidic solutions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC90177H
Abstract: Correction for ‘Mesoporous hybrid material composed of Mn 3 O 4 nanoparticles on nitrogen-doped graphene for highly efficient oxygen reduction reaction’ by Jingjing Duan et al., Chem. Commun. , 2013, 49 , 7705–7707.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EY00018D
Abstract: Electrochemical CO 2 reduction has been widely explored since 1970's, which could alleviate the current environmental and energy crisis caused by excessive CO 2 . Various strategies have been developed, including engineering and optimization of electrolytic cells and catalysts.
Publisher: Wiley
Date: 07-11-2013
Abstract: A highly hydrated structure was fabricated for catalyzing the oxygen evolution reaction (OER), which demonstrated significantly enhanced catalytic activity, favorable kinetics, and strong durability. The enhanced performance is correlated with the dual-active-site mechanism, and high hydrophilicity of the electrode can dramatically expedite the process of water oxidation into molecular oxygen.
Publisher: American Chemical Society (ACS)
Date: 23-08-2018
Abstract: We develop strained nickel phosphide nanosheets with 5 nm thickness and several hundreds of nanometers lateral size aligned on the top of nickel foam/nickel sulfide support. The material is characteristic of substantial compressive strain of 5.6% along nickel-phosphorus bond length, originated from the in situ topotactic transformation. The architecture demonstrates excellent performances toward electrocatalytic hydrogen evolution with the turnover frequency exceeding its strain-free counterpart by a factor of 24. Further study reveals the strain effect leads to downshifts of the d-band center in Ni-P bonds, weakens the adsorption to hydrogen species, and in turn facilitates hydrogen formation and desorption for boosted catalysis.
Publisher: Wiley
Date: 29-11-2014
Publisher: American Chemical Society (ACS)
Date: 15-09-2016
Abstract: As substitutes for precious cathodic Pt/C and anodic IrO2 in electrolytic water splitting cells, a bifunctional catalyst electrode (Fe- and O-doped Co2P grown on nickel foam) has been fabricated by manipulating the cations and anions of metal compounds. The modified catalyst electrode exhibits both superior HER and OER performances with high activity, favorable kinetics, and outstanding durability. The overall ability toward water splitting is especially extraordinary, requiring a small overpotential of 333.5 mV to gain a 10 mA cm(-2) current density. A study on the electrocatalytic mechanism reveals that the atomic modulation between cation and anion plays an important role in optimizing the electrocatalytic activity, which greatly expands the active sites in the electrocatalyst. Further, the three-dimensional conductive porous network is highly advantageous for the exposure of active species, the transport of bubble products, and the transfer of electrons and charges, which substantially boosts reaction kinetics and structure stability.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3QM00614J
Abstract: We report the confined growth of nickel, iron-metal–organic framework electrodes characteristic of porous yet densely packed architectures, which shows excellent activities toward oxygen evolution at the practical levels of catalyst loadings.
Publisher: American Chemical Society (ACS)
Date: 17-01-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA05387J
Abstract: Aqueous dispersions of metal–organic frameworks (MOFs) are formed by tuning their self-contained oxygen percentages driven by O 2 plasma leading to a class of “uncapped” MOFs for many applications such as oxygen evolution reaction.
Publisher: Wiley
Date: 08-2021
DOI: 10.1002/EXP.20210002
Abstract: Biological applications of nanomaterials as delivery carriers have been embedded in traditional biomedical research for decades. Despite lagging behind, recent significant breakthroughs in the use of nanocarriers as tools for plant biotechnology have created great interest. In this Perspective, we review the outstanding recent works in nanocarrier‐mediated plant transformation and its agricultural applications. We analyze the chemical and physical properties of nanocarriers determining their uptake efficiency and transport throughout the plant body.
Publisher: American Chemical Society (ACS)
Date: 10-07-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA00627H
Publisher: American Chemical Society (ACS)
Date: 22-10-2019
Abstract: Sodium-ion capacitors (SICs) have shown great potential to combine the merits of high-power capability of traditional capacitors and high energy capability of batteries. However, the sluggish kinetics and inferior stability of conventional sodium-ion storage anode materials are major challenges for the practical utilization of SICs. In this work, interconnected urchin-like hollow Na
Publisher: Elsevier BV
Date: 2023
Publisher: Elsevier BV
Date: 06-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC43338B
Abstract: The hybrid material composed of Mn3O4 nanoparticles on nitrogen-doped graphene was prepared via a solvothermal process and investigated for the first time as a catalyst for oxygen reduction reaction (ORR). Its high ORR activity, excellent durability and tolerance to methanol make this hybrid material a promising candidate for highly efficient ORR in fuel cells and metal-air batteries.
Publisher: Springer Science and Business Media LLC
Date: 05-06-2017
DOI: 10.1038/NCOMMS15341
Abstract: Two-dimensional metal-organic frameworks represent a family of materials with attractive chemical and structural properties, which are usually prepared in the form of bulk powders. Here we show a generic approach to fabricate ultrathin nanosheet array of metal-organic frameworks on different substrates through a dissolution–crystallization mechanism. These materials exhibit intriguing properties for electrocatalysis including highly exposed active molecular metal sites owning to ultra-small thickness of nanosheets, improved electrical conductivity and a combination of hierarchical porosity. We fabricate a nickel-iron-based metal-organic framework array, which demonstrates superior electrocatalytic performance towards oxygen evolution reaction with a small overpotential of 240 mV at 10 mA cm −2 , and robust operation for 20,000 s with no detectable activity decay. Remarkably, the turnover frequency of the electrode is 3.8 s −1 at an overpotential of 400 mV. We further demonstrate the promise of these electrodes for other important catalytic reactions including hydrogen evolution reaction and overall water splitting.
Publisher: American Chemical Society (ACS)
Date: 03-12-2018
Publisher: American Chemical Society (ACS)
Date: 26-07-2023
Publisher: Springer Science and Business Media LLC
Date: 18-05-2023
DOI: 10.1038/S41467-023-38497-3
Abstract: Acidic CO 2 -to-HCOOH electrolysis represents a sustainable route for value-added CO 2 transformations. However, competing hydrogen evolution reaction (HER) in acid remains a great challenge for selective CO 2 -to-HCOOH production, especially in industrial-level current densities. Main group metal sulfides derived S-doped metals have demonstrated enhanced CO 2 -to-HCOOH selectivity in alkaline and neutral media by suppressing HER and tuning CO 2 reduction intermediates. Yet stabilizing these derived sulfur dopants on metal surfaces at large reductive potentials for industrial-level HCOOH production is still challenging in acidic medium. Herein, we report a phase-engineered tin sulfide pre-catalyst (π-SnS) with uniform rhombic dodecahedron structure that can derive metallic Sn catalyst with stabilized sulfur dopants for selective acidic CO 2 -to-HCOOH electrolysis at industrial-level current densities. In situ characterizations and theoretical calculations reveal the π-SnS has stronger intrinsic Sn-S binding strength than the conventional phase, facilitating the stabilization of residual sulfur species in the Sn subsurface. These dopants effectively modulate the CO 2 RR intermediates coverage in acidic medium by enhancing *OCHO intermediate adsorption and weakening *H binding. As a result, the derived catalyst (Sn(S)-H) demonstrates significantly high Faradaic efficiency (92.15 %) and carbon efficiency (36.43 %) to HCOOH at industrial current densities (up to −1 A cm −2 ) in acidic medium.
Publisher: American Chemical Society (ACS)
Date: 05-07-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA02684D
Abstract: Rigid 2D In-MOF nanosheets is investigated as electrocatalysts for nitrogen electroreduction in the entire pH range for the first time, which follows an enzymatic mechanism, with the potential determining step being *H 2 NNH 2 * → *NH 2 + NH 3 .
Publisher: Springer Science and Business Media LLC
Date: 22-02-2016
DOI: 10.1038/SREP21682
Abstract: Integration of conductive materials into optical fibres can largely expand functions of fibre devices including surface plasmon resonator/metamaterial, modulators/detectors, or biosensors. Some early attempts have been made to incorporate metals such as tin into fibres during the fibre drawing process. Due to the restricted range of materials that have compatible melting temperatures with that of silica glass, the methods to incorporate metals along the length of the fibres are very challenging. Moreover, metals are nontransparent with strong light absorption, which causes high fibre loss. This article demonstrates a novel but simple method for creating transparent conductive reduced graphene oxide film onto microstructured silica fibres for potential optoelectronic applications. The strongly confined evanescent field of the suspended core fibres with only 2 μW average power was creatively used to transform graphene oxide into reduced graphene oxide with negligible additional loss. Existence of reduced graphene oxide was confirmed by their characteristic Raman signals, shifting of their fluorescence peaks as well as largely decreased resistance of the bulk GO film after laser beam exposure.
Publisher: Wiley
Date: 20-04-2023
Abstract: This work reports a metal–organic framework (MOF) with less‐coordinated copper dimers, which displays excellent electrochemical CO 2 reduction (eCO 2 RR) performance with an advantageous current density of 0.9 A cm −2 and a high Faradaic efficiency of 71% to C 2 products. In comparison with MOF with Cu monomers that are present as Cu 1 O 4 with a coordination number of 3.8 ± 0.2, Cu dimers exist as O 3 Cu 1 ···Cu 2 O 2 with a coordination number of 2.8 ± 0.1. In situ characterizations together with theoretical calculations reveal that two *CO intermediates are stably adsorbed on each site of less‐coordinated Cu dimers, which favors later dimerization via a key intermediate of *CH 2 CHO. The highly unsaturated dual‐atomic Cu provides large‐quantity and high‐quality actives sites for carbon–carbon coupling, achieving the optimal trade‐off between activity and selectivity of eCO 2 RR to C 2 products.
Publisher: American Chemical Society (ACS)
Date: 30-06-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA00133D
Publisher: American Chemical Society (ACS)
Date: 08-01-2015
DOI: 10.1021/NN506701X
Abstract: Pt-free electrocatalysts for hydrogen evolution reaction (HER) with high activity and low price are desirable for many state-of-the-art renewable energy devices, such as water electrolysis and photoelectrochemical water splitting cells. However, the design and fabrication of such materials remain a significant challenge. This work reports the preparation of a flexible three-dimensional (3D) film by integrating porous C3N4 nanolayers with nitrogen-doped graphene sheets, which can be directly utilized as HER catalyst electrodes without substrates. This nonmetal electrocatalyst has displayed an unbeatable HER performance with a very positive onset-potential close to that of commercial Pt (8 mV vs 0 mV of Pt/C, vs RHE @ 0.5 mA cm(-2)), high exchange current density of 0.43 mA cm(-2), and remarkable durability (seldom activity loss >5000 cycles). The extraordinary HER performance stems from strong synergistic effect originating from (i) highly exposed active sites generated by introduction of in-plane pores into C3N4 and exfoliation of C3N4 into nanosheets, (ii) hierarchical porous structure of the hybrid film, and (iii) 3D conductive graphene network.
Publisher: American Chemical Society (ACS)
Date: 12-08-2022
Publisher: American Chemical Society (ACS)
Date: 27-01-2020
Abstract: Metal clusters, an emerging category of materials with molecular metal dispersity, have been proposed for versatile applications. In this work, we show an unexpected function of metal clusters, which can contribute to preparing 2D/2D superlattice-like heterostructures. The key step is to use metal clusters to adjust the surface charge of 2D nanosheets and, consequently, match the charge negativities per surface area for different 2D nanosheets, which facilitate the electrical-driven assembly of these nanosheets into a superlattice-like heterostructure in aqueous solutions. Accordingly, iron-cluster-directed cationic Fe-N-C nanosheets (Zeta potential: +30.4 mV) have been assembled with anionic MXene (Zeta potential: -39.7 mV) to produce a superlattice-like heterostructure characteristic of a lateral size of around tens of nanometers, a surface area of 30 m
Publisher: Wiley
Date: 05-08-2012
Abstract: MXenes represent a category of two-dimensional functional nanomaterials with remarkable structural and chemical properties, which have been manipulated into different architectures for versatile applications. These manipulation processes generally take place at the interfaces between liquid, solid, and gas and therefore, the investigation of the interfacial property of MXenes is the key. Here we show that MXenes exhibit hiphilic behaviours at interfaces. Different from common hiphiles, MXenes have the dual function of both colloidal and molecular activities owing to their two abrupt structural length scales: their large lateral sheet size allows for behaving like colloidal hiphiles for creating emulsions, while their small sheet thickness allows for serving as molecular hiphiles for dispersing solid substances. Further, such dual colloidal-molecular hiphility has driven MXenes to accumulate at the interfaces of water and nitrogen gas, and the assembly into thin film electrodes for electrochemical energy storage. All these findings open up enormous opportunities for processing various MXenes-related functional materials and devices.
Publisher: Wiley
Date: 27-01-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3EE42383B
Publisher: American Chemical Society (ACS)
Date: 19-12-2016
Abstract: The role of carbon nanotubes in the advancement of energy conversion and storage technologies is undeniable. In particular, carbon nanotubes have attracted significant applications for electrocatalysis. However, one central issue related to the use of carbon nanotubes is the required oxidative pretreatment that often leads to significant damage of graphitic structures which deteriorates their electrochemical properties. Traditionally, the oxidized carbon nanomaterials are treated at high temperature under an inert atmosphere to repair the oxidation-induced defect sites, which simultaneously removes a significant number of oxygen functional groups. Nevertheless, recent studies have shown that oxygen functional groups on the surface of MWCNT are the essential active centers for a number of important electrocatalytic reactions such as hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). Herein we first show that hydrothermal treatment as a mild method to improve the electrochemical properties and activities of surface-oxidized MWCNT for OER, HER, and ORR without significantly altering the oxygen content. The results indicate that hydrothermal treatment could potentially repair the defects without significantly reducing the pre-existing oxygen content, which has never been achieved before with conventional high-temperature annealing treatment.
Publisher: Wiley
Date: 16-02-2016
Abstract: A universal technique has been proposed to sort two-dimensional (2D) sub-nanometer thin crystals (manganese dioxide MnO2 and molybdenum disulfide MoS2 ) according to their lateral dimensions. This technique is based on tuning the zeta potential of their aqueous dispersions which induces the selective sedimentation of large-sized 2D crystals and leaves the small-sized counterparts in suspension. The electrocatalytic properties of as-obtained 2D ultrathin crystals are strongly dependent on their lateral size. As a proof-of-concept study, the small-sized MnO2 nanocrystals were tested as the electrocatalysts for the urea-oxidation reaction (UOR), which showed outstanding performance in both half reaction and full electrolytic cell. A mechanism study reveals the enhanced performance is associated with the remarkable structural properties of MnO2 including ultrathin (ca. 0.95 nm), laterally small-sized (50-200 nm), and highly exposed active centers.
Publisher: Wiley
Date: 10-06-2015
Publisher: Wiley
Date: 08-08-2023
DOI: 10.1002/CEY2.416
Abstract: Industrial CO 2 electroreduction has received tremendous attentions for resolution of the current energy and environmental crisis, but its performance is greatly limited by mass transport at high current density. In this work, an ion‐polymer‐modified gas‐diffusion electrode is used to tackle this proton limit. It is found that gas diffusion electrode‐Nafion shows an impressive performance of 75.2% Faradaic efficiency in multicarbon products at an industrial current density of 1.16 A/cm 2 . Significantly, in‐depth electrochemical characterizations combined with in situ Raman have been used to determine the full workflow of protons, and it is found that HCO 3 − acts as a proton pool near the reaction environment, and HCO 3 − and H 3 O + are local proton donors that interact with the proton shuttle −SO 3 − from Nafion. With rich proton hopping sites that decrease the activation energy, a “Grotthuss” mechanism for proton transport in the above system has been identified rather than the “Vehicle” mechanism with a higher energy barrier. Therefore, this work could be very useful in terms of the achievement of industrial CO 2 reduction fundamentally and practically.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EE00509G
Abstract: An abnormal size effect was used to drive two-electron oxygen electroreduction, where large-size ZnO outperform its small-size counterpart, demonstrating ∼100% selectivity to H 2 O 2 up to ere-level current densities in neutral electrolytes.
Publisher: American Chemical Society (ACS)
Date: 09-12-2015
Abstract: Low efficiency and poor stability are two major challenges we encounter in the exploration of non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) in both acidic and alkaline environment. Herein, the hybrid of cobalt encapsulated by N, B codoped ultrathin carbon cages (Co@BCN) is first introduced as a highly active and durable nonprecious metal electrocatalysts for HER, which is constructed by a bottom-up approach using metal organic frameworks (MOFs) as precursor and self-sacrificing template. The optimized catalyst exhibited remarkable electrocatalytic performance for hydrogen production from both both acidic and alkaline media. Stability investigation reveals the overcoating of carbon cages can effectively avoid the corrosion and oxidation of the catalyst under extreme acidic and alkaline environment. Electrochemical active surface area (EASA) evaluation and density functional theory (DFT) calculations revealed that the synergetic effect between the encapsulated cobalt nanoparticle and the N, B codoped carbon shell played the fundamental role in the superior HER catalytic performance.
Publisher: Wiley
Date: 23-09-2021
DOI: 10.1002/EXP.20210021
Abstract: Applications for metal–organic frameworks (MOFs) demand their assembly into three‐dimensional (3D) macroscopic architectures. The capability of sustaining structural integrity with considerable deformation is important to allow a monolithic material to work reliably. Nevertheless, it remains a significant challenge to introduce superplasticity in 3D MOF networks. Here, we report a general procedure for synthesizing 3D superplastic MOF aerogels inspired by the hierarchical architecture of natural corks. The resultant MOFs exhibited excellent superplasticity that can recover fully and rapidly to its original dimension after 50% strain compression and unloading for cycles. The 3D superplastic architecture is achieved by successively assembling one‐dimensional (1D) to two‐dimensional (2D) and then 3D, in a variety of MOFs with different transition metal active sites (Co‐, NiMn‐, NiCo‐, NiCoMn‐) and organic ligands (2‐thiophenecarboxylic acid and glutaric acid). Latent applications have been demonstrated for NiMn‐MOF aerogels to serve as a new generation of flexible electrocatalysts for hydrogen evolution reaction (HER) from seawater splitting, which requires a low overpotential of 243 mV to achieve a current density of 10 mA·cm −2 . Notably, the electrocatalyst remains stable even being deformed, as the overpotential to achieve a current density of 10 mA·cm −2 increases slightly to 270, 264, and 258 mV after one‐, two‐, and threefold, respectively. In great contrast, traditional MOF powder‐electrodes demonstrate significant activity decay under similar conditions. This work opens up enormous opportunities for exploring new applications of MOFs in a freestanding, structurally adaptive, and macroscopic form.
Publisher: Wiley
Date: 28-03-2013
Abstract: Graphene-based hydrogels can be used as supercapacitor electrodes because of their excellent conductivity, their large surface area and their high compatibility with electrolytes. Nevertheless, the large aspect ratio of graphene sheets limits the kinetics of processes occurring in the electrode of supercapacitors. In this study, we have introduced in-plane and out-of-plane pores into a graphene-nickel hydroxide (Ni(OH)2) hybrid hydrogel, which facilitates charge and ion transport in the electrode. Due to its optimised chemistry and architecture, the hybrid electrode demonstrates excellent electrochemical properties with a combination of high charge storage capacitance, fast rate capability and stable cycling performance. Remarkably, the Ni(OH)2 in the hybrid contributes a capacitance as high as 3138.5 F g(-1), which is comparable to its theoretical capacitance, suggesting that such structure facilitates effectively charge-transfer reactions in electrodes. This work provides a facile pathway for tailoring the porosity of graphene-based materials for improved performances. Moreover, this work has also furthered our understanding in the effect of pore and hydrogel structures on the electrochemical properties of materials.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CC47665K
Abstract: A three-dimensional framework promoter of graphene-MnO2 was fabricated to enhance the catalytic properties of NiCo2O4. The as-resultant graphene-MnO2-NiCo2O4 hybrid material features a number of remarkable structural properties such as well-developed pores, 3D conductive networks and strong coupling synergistic effects, rendering it an outstanding catalyst for electrocatalytic oxygen evolution.
Publisher: Elsevier BV
Date: 2015
Publisher: American Chemical Society (ACS)
Date: 24-10-2018
Start Date: 2018
End Date: 2019
Funder: University of Adelaide
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