| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Ultrafine Mo-Doped Co$_{2}$P Nanorods Anchored on Reduced Graphene Oxide as Efficient Electrocatalyst for the Hydrogen Evolution Reaction |
| Yi-Xuan Wang1, Qing Yang1, Chuang Liu1, Guang-Xia Wang2, Min Wu1, Hao Liu1, Yong-Ming Sui1, Xin-Yi Yang1** |
1State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012
2School of Applied Physics and Materials, Wuyi University, Jiangmen 529020
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| Cite this article: |
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Yi-Xuan Wang, Qing Yang, Chuang Liu et al 2020 Chin. Phys. Lett. 37 058201 |
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Abstract One-dimensional (1D) transition metal phosphides (TMPs) with large specific surface areas, high charge transfer efficiency and excellent electrical conductivity have attracted significant attention in hydrogen evolution reaction (HER) as versatile and active catalysts. Herein, the sub-4 nm Mo-Co$_{2}$P ultrafine nanorods (NRs) anchored on reduced graphene oxide (rGO) were successfully synthesized by a colloidal mesostructured strategy. Electrochemical test results reveal that the Mo-Co$_{2}$P@rGO electrode exhibits superior activity with overpotentials of 204 mV and Tafel slope of 88 mV/dec for HER at 10 mA/cm$^{2}$, relative to the Co$_{2}$P@rGO electrode in 0.5 M H$_{2}$SO$_{4}$ solution. This improvement could be ascribed to the Mo doping, which results in more active sites, higher electrical conductivity and faster electron-transfer rates. This versatile strategy will provide a promising pathway for transition metal-doped compounds as an efficient catalyst.
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Received: 27 November 2019
Published: 25 April 2020
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| PACS: |
82.45.Yz
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(Nanostructured materials in electrochemistry)
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78.67.Qa
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(Nanorods)
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61.46.Km
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(Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires))
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| Fund: Supported by the National Natural Science Foundation of China (Grant Nos. 11874027, 11774124, and 11504126) and the China Postdoctoral Science Foundation (Grant Nos. 2019T120233 and 2017M621198). |
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