期刊
ROYAL SOCIETY OPEN SCIENCE
卷 4, 期 3, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsos.161016
关键词
hydrogen evolution reaction; electrocatalyst; ternary; cobalt phosphide; molybdenum; phosphide
资金
- Ministry of Science and Technology [104-2113-M-002-013-MY2]
- Academia Summit Program from Ministry of Science and Technology [104-2745-M-002-004-ASP, 105-2745-M-002-003-ASP]
Production of hydrogen from water electrolysis has stimulated the search of sustainable electrocatalysts as possible alternatives. Recently, cobalt phosphide (CoP) and molybdenum phosphide (MoP) received great attention owing to their superior catalytic activity and stability towards the hydrogen evolution reaction (HER) which rivals platinum catalysts. In this study, we synthesize and study a series of catalysts based on hybrids of CoP and MoP with different Co/Mo ratio. The HER activity shows a volcano shape and reaches a maximum for Co/Mo=1. Tafel analysis indicates a change in the dominating step of Volmer-Hyrovsky mechanism. Interestingly, X-ray diffraction patterns confirmed a major ternary interstitial hexagonal CoMoP2 crystal phase is formed which enhances the electrochemical activity.
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