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  Zn-VOx-Co nanosheets with amorphous/crystalline heterostructure for highly efficient hydrogen evolution reaction

Chen, M., Liu, J., Kitiphatpiboon, N., Li, X., Wang, J., Hao, X., et al. (2022). Zn-VOx-Co nanosheets with amorphous/crystalline heterostructure for highly efficient hydrogen evolution reaction. Chemical Engineering Journal, 432: 134329, pp. 1-10. doi:10.1016/j.cej.2021.134329.

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 Creators:
Chen, Meng1, Author
Liu, Jianbin1, Author
Kitiphatpiboon, Nutthaphak1, Author
Li, Xiumin1, Author
Wang, Junli1, Author
Hao, Xiagoang1, Author
Abudula, Abuliti1, Author
Ma, Yufei2, Author           
Guan, Guoqing1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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Free keywords: Binary alloys; Carbon fibers; Catalyst activity; Cost effectiveness; Density functional theory; Electrocatalysts; Hydrogen production; Potassium hydroxide, Amorphous structures; Cost effective; Dual doping; High activity; Hydrogen evolution reactions; Metal-doping; Scaling-up; Water electrolysis; Zn-VOx-co nanosheet; ]+ catalyst, Nanosheets
 Abstract: Designing cost-effective catalysts with high-activity and ultra-stability for hydrogen evolution reaction (HER) is important in the scaling-up of water electrolysis process for hydrogen production. Herein, a Zn-VOx-Co two-dimensional (2D) nanosheet with well-integrated heterostructure was successfully synthesized on carbon fiber paper (CFP) by a facile electrodeposition approach. Interestingly, the obtained nanosheets composed of amorphous VOx-Co and Zn-Co crystalline phases with a heterostructure. Density functional theory (DFT) calculations reveled that the dual-doping of Zn and VOx optimized d-band center of Co and balanced adsorption and desorption of H, which enhanced intrinsic electrocatalytic HER activity. As a result, the optimum catalyst achieved a current density of 10 mA cm−2 at an overpotential as low as 46 mV and long-term electrochemical stability over 36 h in 1 M KOH solution. This work opens a new avenue for designing electrocatalysts with unique crystalline-amorphous heterostructure by dual-doping to achieve tunable surface properties as well as d-band structure. © 2021 Elsevier B.V.

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Language(s): eng - English
 Dates: 2022-01-032022-01-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.cej.2021.134329
BibTex Citekey: Chen2022
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Title: Chemical Engineering Journal
Source Genre: Journal
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Publ. Info: Lausanne : Elsevier
Pages: - Volume / Issue: 432 Sequence Number: 134329 Start / End Page: 1 - 10 Identifier: ISSN: 1385-8947
CoNE: https://pure.mpg.de/cone/journals/resource/954925622211