期刊
CHEMICAL ENGINEERING JOURNAL
卷 397, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125457
关键词
Interfaces; Electrocatalysis; Alkaline hydrogen evolution reaction; Nickel phosphide; Ruthenium
资金
- National Natural Science Foundation of China [21673179, 21776121, 81571809, 81771981]
- China Postdoctoral Science Foundation [2019M663945XB]
- Outstanding Youth Foundation of Jiangsu Province of China [BK20160012]
- National Key Research and Development Program of China [2017YFA0205700]
- National Materials Genome Project [2016YFB0700600]
- Shaanxi Province Funds for Distinguished Young Scholars [202031900097]
Hydrogen evolution reaction (HER) on commercial precious metal catalysts in acid solution is a robust process, but in alkaline media suffers from limitations in HER activity and stability because of the sluggish kinetics of water dissociation step on noble metal catalysts. Here, carbon fiber-supported porous nickel phosphide nanosheets have been used to decorate ruthenium nanoclusters (CF@P-Ni2P/Ru) to generate a hybrid catalyst. The synthesized CF@P-Ni2P/Ru catalyst with multiple- interfaces exhibits overpotential as low as only 45 and 112 mV to deliver current of -10 and -100 mA cm(geo)(-2), respectively, and long stability of at least 100 h to achieve -10 mA cm(geo)(-2). Dual-pathway kinetic analysis and density functional theory (DFT) calculations reveal that the hybrids of P-Ni2P and Ru enable stronger water dissociation at the interface of P-Ni2P/Ru and lower the energy barrier of Volmer step, which is beneficial for the HER. Such unique hybrid structure and superior performance provides an important route to fabricating advanced electrocatalysts.
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