期刊
ACS NANO
卷 8, 期 4, 页码 3970-3978出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn500880v
关键词
nitrogen-doped graphene; composite catalysts; water oxidation; cobalt selnides; nanobelts
类别
资金
- Ministry of Science and Technology of China
- National Basic Research Program of China [2012BAD32B05-4, 2010CB934700, 2013CB933900, 2014CB931800]
- National Natural Science Foundation of China [91022032, 91227103, 21061160492, J1030412, 21101051]
- Chinese Academy of Sciences [KJZD-EWM01-1]
- Fundamental Research Funds for the Central Universities [2012HGCX0003, WK 2060190021]
- National Synchrotron Radiation Laboratory at the University of Science and Technology of China
The slow kinetics of the oxygen evolution reaction (OER) greatly hinders the large-scale production of hydrogen fuel from water splitting. Although many OER electrocatalysts have been developed to negotiate this difficult reaction, substantial progresses in the design of cheap, robust, and efficient catalysts are still required and have been considered a huge challenge. Here, we report a composite material consisting of CoSe2 nanobelts anchored on nitrogen-doped reduced graphene oxides (denoted as NG-CoSe2) as a highly efficient OER electrocatalyst. In 0.1 M KOH, the new NG-CoSe2 catalyst afforded a current density of 10 mA cm(-2) at a small overpotential of mere 0.366 V and a small Tafel slope of similar to 40 mV/decade, comparing favorably with the state-of-the-art RuO2 catalyst. This NG-CoSe2 catalyst also presents better stability than that of RuO2 under harsh OER cycling conditions. Such good OER performance is comparable to the best literature results and the synergistic effect was found to boost the OER performance. These results raise the possibility for the development of effective and robust OER electrodes by using cheap and easily prepared NG-CoSe2 to replace the expensive commercial catalysts such as RuO2 and IrO2.
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