期刊
NANOSCALE
卷 10, 期 29, 页码 13930-13935出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr03554g
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资金
- National Natural Science Foundation of China [51472255]
- Ningbo municipal science and technology innovative research team [2015B11002, 2016B10005]
Large-scale hydrogen production through alkaline water electrolysis requires highly active and less expensive materials to replace platinum as a catalyst for the hydrogen evolution reaction (HER). Ruthenium, as the cheapest platinum-group element, has recently been demonstrated to exhibit excellent activity toward the HER. However, achieving better HER activity of ruthenium-based materials by selecting a more active phase is still unexplored. Herein, we report the fabrication of self-supported RuP and RuP2 catalyst films on carbon cloth (RuP/CC and RuP2/CC) via a facile, potentially scalable, and phase-controllable synthetic method. RuP/CC displays superior catalytic activity with a low overpotential of 13 mV at 10 mA cm(-1), outperforming RuP2/CC (33 mV at 10 mA cm(-1)) and most non-Pt HER catalysts. Moreover, good electrochemical stability and faradaic efficiency of nearly 100% are also demonstrated for RuP/CC. Density functional theory calculations reveal that RuP with a higher charge density at the Ru site is more favorable for the chemisorption of hydrogen, thereby exhibiting better HER activity than RuP2.
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