期刊
ACS CATALYSIS
卷 7, 期 6, 页码 4214-4220出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.7b00792
关键词
nitrogen doping; cobalt sulfide; electrocatalysts; oxygen evolution reaction; DFT calculations
资金
- National Natural Science Foundation of China [21522603]
- Chinese-German Cooperation Research Project [GZ1091]
- Excellent Youth Foundation of Jiangsu Scientific Committee [BK20140011]
- Research Foundation of Jiangsu University [16JDG040]
- Jiangsu Postdoctoral Foundation [1601091B]
A thorough understanding of the effect of N doping on the oxygen evolution reaction (OER) is greatly significant for constructing next generation electrocatalysts with an optimal configuration and high efficiency for the fuel cell. Herein, we reported the synthesis of N-doped CoS2 through a facile method using ammonium hydroxide as the N source, the subjection of N-doped CoS2 as efficient electrocatalysts for OER, and the identification of intrinsic activities by exploring the composition and electronic configurations and their correlations with the electrochemical performance. The DFT studies evidenced that N doping could alter the electronic density of the adjacent Co atoms and thus form well-defined electronic configurations for adsorption of intermediates. Specifically, the N-enriched CoS2 afford a small overpotential of 240 mV at the current density of 10 mA cm(-2) and long-term durability, endowing these N-doped materials to be ideal (but not limited to) OER electrocatalysts.
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