期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 30, 页码 19386-19392出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b03392
关键词
nickel-iron bimetallic selenide; porous nanosheets; carbon fiber cloth (CFC); electrochemical catalyst; oxygen evolution
资金
- National Key Research Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- International Science & Technology Cooperation Program of China [2013DFA50840]
- National Natural Science Foundation of China [51521001, 51272197, 51502227]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- China Postdoctoral Science [2015T80845]
- Foundation and the Fundamental Research Funds for the Central Universities (WUT) [2014-IV-062, 2014-IV-147]
Exploring non-noble and high-efficiency electrocatalysts is critical to large-scale industrial applications of electrochemical water splitting. Currently, nickel-based selenide materials are promising candidates for oxygen evolution reaction due to their low cost and excellent performance. In this work, we report the porous nickel-iron bimetallic selenide nanosheets ((Ni0.73Fe0.23)Se-2) on carbon fiber cloth (CFC) by selenization of the ultrathin NiFe-based nanosheet precursor. The as-prepared three-dimensional oxygen evolution electrode exhibits a small overpotential of 255 mV at 35 mA cm(-2) and a low Tafel slope of 47.2 mV dec(-1) and keeps high stability during a 28 h measurement in alkaline solution. The outstanding catalytic performance and strong durability, in comparison to the advanced non-noble metal catalysts, are derived from the porous nanostructure fabrication, Fe incorporation, and selenization, which result in fast charge transportation and large electrochemically active surface area and enhance the release of oxygen bubbles from the electrode surface.
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