期刊
ADVANCED MATERIALS
卷 30, 期 29, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201801351
关键词
Cu doping; facet effect; MOFs derivatives; OER in acidic media; RuO2
类别
资金
- National Natural Science Foundation [51472255]
- aided program for science and technology innovative research team of Ningbo municipality [2015B11002, 2016B10005]
- NSF of Zhejiang Province [LR14E020004]
- China Postdoctoral Science Foundation [2017M621986]
Here, a facile and novel strategy for the preparation of Cu-doped RuO2 hollow porous polyhedra composed of ultrasmall nanocrystals through one-step annealing of a Ru-exchanged Cu-BTC derivative is reported. Owing to the optimized surface configuration and altered electronic structure, the prepared catalyst displays a remarkable oxygen evolution reaction (OER) performance with low overpotential of 188 mV at 10 mA cm(-2) in acidic electrolyte, an ultralow Tafel slope of 43.96 mV dec(-1), and excellent stability in durability testing for 10 000 cycles, and continuous testing of 8 h at a current density of 10 mA cm(-2). Density functional theory calculations reveal that the highly unsaturated Ru sites on the high-index facets can be oxidized gradually and reduce the energy barrier of rate-determining steps. On the other hand, the Cu dopants can alter the electronic structures so as to further improve the intrinsic OER activity.
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