期刊
NANO LETTERS
卷 16, 期 10, 页码 6617-6621出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b03332
关键词
Ternary; CoP; hydrogen evolution reaction; electrocatalyst; density functional theory
类别
资金
- National Natural Science Foundation of China [21575137]
- Science and Technology Innovation Foundation of Jilin Province [20150519014JH]
Replacement of precious Pt with earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) holds great promise for clean energy devices, but the development of low-cost and durable HER catalysts with Pt-like activity is still a huge challenge. In this communication, we report on the development of self-standing ternary FexCo1-xP nanowire array on carbon cloth (FexCo1-xP/CC) as a Pt-free HER catalyst with activities being strongly related to Fe substitution ratio. Electrochemical tests show that Fe0.5Co0.5P/CC not only possesses Pt-like activity with the need of overpotential of only 37 mV to drive 10 mA cm(-2), outperforming all non noble-metal HER catalysts reported to date, but demonstrates superior long-term durability in 0.5 M H2SO4. Density functional theory calculations further reveal that Fe substitution of Co in CoP leads to more optimal free energy of hydrogen adsorption to the catalyst surface. This study offers us a promising flexible monolithic catalyst for practical applications.
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