ORCID Profile
0000-0002-7023-5986
Current Organisation
Chongqing University
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Publisher: Springer Science and Business Media LLC
Date: 04-10-2018
DOI: 10.1038/S41467-018-06144-X
Abstract: The low-cost room-temperature sodium-sulfur battery system is arousing extensive interest owing to its promise for large-scale applications. Although significant efforts have been made, resolving low sulfur reaction activity and severe polysulfide dissolution remains challenging. Here, a sulfur host comprised of atomic cobalt-decorated hollow carbon nanospheres is synthesized to enhance sulfur reactivity and to electrocatalytically reduce polysulfide into the final product, sodium sulfide. The constructed sulfur cathode delivers an initial reversible capacity of 1081 mA h g −1 with 64.7% sulfur utilization rate significantly, the cell retained a high reversible capacity of 508 mA h g −1 at 100 mA g −1 after 600 cycles. An excellent rate capability is achieved with an average capacity of 220.3 mA h g −1 at the high current density of 5 A g −1 . Moreover, the electrocatalytic effects of atomic cobalt are clearly evidenced by operando Raman spectroscopy, synchrotron X-ray diffraction, and density functional theory.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3TA01668D
Abstract: An in situ ATR-SEIRAS CO-probe method is used to identify surface active sites and clarify structure–activity relationship of PtAu catalysts via second-derivative spectrum method and Gaussian fitting of infrared spectra of CO oxidation reaction.
Publisher: American Chemical Society (ACS)
Date: 12-10-2023
Publisher: Research Square Platform LLC
Date: 06-12-2022
DOI: 10.21203/RS.3.RS-2295214/V1
Abstract: The mechanical effects on carbon-based metal-free catalysts (C-MFCs) have rarely been explored although the C-MFCs have attracted worldwide interest as alternatives to the noble metal catalysts. Stress is everywhere, but a specialized study is strongly limited because the stress usually intermingles with other structural variables, including the dopants, defects, and interfaces in catalysis. Herein, we report a proof-of-concept study by establishing a platform to apply strain to a highly oriented pyrolytic graphite (HOPG) lamina continuously and collecting the electrochemical signals simultaneously. For the first time, the correlation between the surface strain of a graphitic carbon and its oxygen reduction reaction (ORR) activation effect is established. Results show that the in-plane and edge carbon sites in HOPG could not be further activated by applying tensile strain, but when the in-plane defects were involved in the structure, a strong and repeatable dependence of the catalytic activity on the tensile strain was observed, wherein ~ 35.0% improvement in ORR current density was realized by applying ~ 0.6% tensile strain. The density function theory (DFT) simulation shows that appropriate strain on the specific defect can optimize the adsorption of reaction intermediates, and the Stone-Wales defect on graphene correlates with the mechanical effect. Moreover, the effect was further authenticated by preparing a powdered graphene-based catalyst with varied strain-involved, which showed an apparent improvement of the ORR activity with ~ 0.4% surface strain. This work clarifies some basic principles of strain effects on graphitic carbon’s catalytic activities towards ORR, and may lay the foundation for developing carbon-based mechanoelectrocatalysis.
Publisher: American Chemical Society (ACS)
Date: 31-08-2023
Publisher: Springer Science and Business Media LLC
Date: 26-10-2020
Publisher: Research Square Platform LLC
Date: 05-04-2021
DOI: 10.21203/RS.3.RS-361418/V1
Abstract: To reach a closed-loop material system and meet the urgent requirement of sustainable energy storage technologies, it is essential to incorporate efficient waste management into designing new energy storage materials. Here, we reported a “two birds with one stone” strategy to transform rusty iron products into Prussian blue as high-performance cathode materials and recover the rusty iron products to their original status. Owing to the high crystalline and Na + content, the rusty iron derived Prussian blue shows a high specific capacity of 145 mAh g − 1 and excellent cycling stability over 3500 cycles. Through the in situ X-ray diffraction and in situ Raman spectra, it is found that the impressive ion storage capability and stability are greatly related to the suppressed structure distortion during the charge/discharge process. The ions migration mechanism and possibility as universal host of other kinds of ions are further illuminated by density functional theory calculations. This work provides a new strategy for recycling wasted materials into high value-added materials for sustainable battery systems, and is adaptable in the nanomedicine, catalysis, sensors, and gas storage applications.
Publisher: Wiley
Date: 09-05-2022
DOI: 10.1002/EXP.20210182
Abstract: Flexibility has become a certain trend in the development of secondary batteries to meet the requirements of wide portability and applicability. On account of their intrinsic high energy density, flexible alkali metal‐chalcogen batteries are attracting increasing interest. Although great advances have been made in promoting the electrochemical performance of metal‐S or metal‐Se batteries, explorations on flexible chalcogen‐based batteries are still limited. Extensive and rational use of soft materials for electrodes is the main bottleneck. The re‐emergence of safe liquid metals (LMs), which provide an ideal combination of metallic and fluidic properties at room temperature, offers a fascinating paradigm for constructing flexible chalcogen batteries. They may provide dendrite‐free anodes and restrain the dissolution of polysulfides and polyselenides for cathodes. From this perspective, we elaborate on the appealing features of LMs for the construction of flexible metal‐chalcogen batteries. Recent advances on LM‐based battery are discussed, covering novel liquid alkali metals as anodes and LM‐sulfur hybrids as cathodes, with the focus placed on durable high‐energy‐density output and self‐healing flexible capability. At last, perspectives are proposed on the future development of LM‐based chalcogen batteries, and the viable strategies to meet the current challenges that are obstructing more practical flexible chalcogen batteries.
Publisher: Springer Science and Business Media LLC
Date: 28-03-2022
DOI: 10.1038/S42004-022-00645-Z
Abstract: Electrochemical oxygen reduction provides an eco-friendly synthetic route to hydrogen peroxide (H 2 O 2 ), a widely used green chemical. However, the kinetically sluggish and low-selectivity oxygen reduction reaction (ORR) is a key challenge to electrochemical production of H 2 O 2 for practical applications. Herein, we demonstrate that single cobalt atoms anchored on oxygen functionalized graphene oxide form Co-O-C@GO active centres (abbreviated as Co 1 @GO for simplicity) that act as an efficient and durable electrocatalyst for H 2 O 2 production. This Co 1 @GO electrocatalyst shows excellent electrochemical performance in O 2 -saturated 0.1 M KOH, exhibiting high reactivity with an onset potential of 0.91 V and H 2 O 2 production of 1.0 mg cm −2 h −1 while affording high selectivity of 81.4% for H 2 O 2 . Our combined experimental observations and theoretical calculations indicate that the high reactivity and selectivity of Co 1 @GO for H 2 O 2 electrogeneration arises from a synergistic effect between the O-bonded single Co atoms and adjacent oxygen functional groups (C-O bonds) of the GO present in the Co-O-C active centres.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA05731F
Abstract: Self-grown ultra-thin and defect-rich CoSe 2 nanosheets show up to 92% selectivity in electrosynthesis of hydrogen peroxide, with ideal yields in electrolytes with different pH.
Publisher: Elsevier BV
Date: 07-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CC03969B
No related grants have been discovered for Binwei Zhang.