期刊
SCIENCE CHINA-MATERIALS
卷 64, 期 4, 页码 880-891出版社
SCIENCE PRESS
DOI: 10.1007/s40843-020-1495-x
关键词
modulated morphology and electronic structures; ternary Co1-xVxP; hydrogen evolution reaction; overall water splitting
资金
- National Natural Science Foundation of China [21671096, 21603094, 21905180]
- Natural Science Foundation of Guangdong Province [2018B030322001, 2018A030310225]
- Shenzhen Peacock Plan [KQTD2016022620054656]
- Shenzhen Key Laboratory Project [ZDSYS201603311013489]
- Basic Research Project of the Science and Technology Innovation Commission of Shenzhen [JCYJ20190809115413414]
- Science and Technology Development Fund from Macau SAR [FDCT-0102/2019/A2, FDCT-0035/2019/AGJ, FDCT-0154/2019/A3]
- University of Macau [MYRG2017-00027-FST, MYRG2018-00003-IAPME]
The study introduces novel ternary Co1-xVxP nano-needle arrays as an efficient HER electrocatalyst. The catalyst shows remarkable catalytic performance and stability, attributed to improved physical and chemical properties as well as fast reaction kinetics.
It is a great challenge to prepare non-noble metal electrocatalysts toward hydrogen evolution reaction (HER) with large current density. Synergistic electronic and morphological structures of the catalyst have been considered as an effective method to improve the catalytic performance, due to the enhanced intrinsic activity and enlarged accessible active sites. Herein, we present novel ternary Co1-xVxP nano-needle arrays with modulated electronic and morphological structures as an electrocatalyst for highly efficient HER in alkaline solution. The NF@Co1-xVxP catalyst shows a remarkable catalytic ability with low overpotentials of 46 and 226 mV at current densities of 10 and 400 mA cm(-2), respectively, as well as a small Tafel slope and superior stability. Combining the experimental and computational study, the excellent catalytic performance was attributed to the improved physical and chemical properties (conductivity and surface activity), large active surface area, and fast reaction kinetics. Furthermore, the assembled Co-V based electrolyzer (NF@Co1-xVx-HNNs(+)||NF@Co1-xVxP(-)) delivers small full-cell voltages of 1.58, 1.75, and 1.92 V at 10, 100, and 300 mA cm(-2), respectively. Our findings provide a systematic understanding on the V-incorporation strategy to promote highly efficient ternary electrocatalysts via synergistic control of morphology and electronic structures.
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