期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 47, 页码 20067-20074出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta04337e
关键词
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资金
- Ministry of Science and Technology of China [2012CB215500, 2013CB933100]
- National Natural Science Foundation of China [21103178, 21033009]
The hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are important electrocatalytic processes in water electrolyzers. Identifying efficient non-precious metal catalysts for HER and OER remains a great challenge for applications in different kinds of electrolyzers. Herein, we report that cobalt nanoparticles encapsulated in nitrogen-doped carbon (Co@N-C) show high activity and durability for HER in a wide pH range and for OER in alkaline medium as a bifunctional catalyst. The HER and OER activities of Co@N-C are higher than those of multiwall carbon nanotube and iron nanoparticles encapsulated in nitrogen-doped carbon with a similar content of nitrogen. Electrolyzer prototypes using Nafion NRE-212 as electrolyte membrane and Co@N-C as cathode or anode catalyst are constructed, showing potential practical applications in water splitting.
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