期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 6, 页码 2780-2786出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta11251g
关键词
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资金
- Shenzhen Key Laboratory project [ZDSYS201603311013489]
- Shenzhen Peacock Plan [KQTD2016022620054656]
- Development and Reform Commission of Shenzhen Municipality 2017 [1106, 1181]
- Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06N500]
As a cheaper Pt-group metal, ruthenium (Ru) is a highly competitive alternative to Pt for commercialization towards the hydrogen evolution reaction (HER). Herein, we report the modulation effect on the Gibbs free energy (Delta G(H)*) of hexagonal-close-packed (hcp) Ru resulting from heteroatom Mo doping. In particular, for the first time the hcp MoRu3 crystal structure is theoretically predicted with pretty high intrinsic HER activity. Meanwhile, the Mo hetero-dopant could act as a new active site with Pt-like Delta G(H)*. Motivated by the prediction, we report a novel metal organic framework (MOF)-assisted synthetic strategy to prepare a Mo-doped hcp Ru electrocatalyst. Accordingly, the hcp MoRu3 catalyst exhibits an ultralow overpotential of 30.5 mV at 10 mA cm(-2), ensuring excellent Pt-like intrinsic HER activity. More importantly, the excellent electrochemical performance measured with a proton exchange membrane (PEM) electrolyzer further highlights the promising potential of the hcp MoRu3 catalyst for hydrogen production.
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