期刊
ACS CATALYSIS
卷 6, 期 3, 页码 1446-1450出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b02571
关键词
ordered mesoporous Ni spheres; templating; electrocatalyst; oxygen evolution reaction; durability
资金
- National Natural Science Foundation of China [51172014]
- National 973 Program of China [2009CB219903]
- State Key Laboratory of Organic-Inorganic Composites [oic-201601003]
- Ministry of Education and Science of the Russian Federation [K2-2015-014]
We report the preparation and use of the three-dimensionally ordered mesoporous Ni sphere arrays (3D-OMNiSA) as a highly effective OER catalyst in alkaline electrolyte. The 3D-OMNiSA is fabricated through lyotropic liquid crystal templating within a polymer inverse opal. The prepared 3D-OMNiSA catalyst exhibits a low overpotential of 254 mV at 10 mA cm(-2) and a small Tafel slope of 39 mV decade(-1), better than the commercial precious RuO2 catalyst. The mass activity (166.5 A g(-1)) and turnover frequency (0.0281 s(-1)) of 3D-OMNiSA are about 4.3 and 2.2 times that of RuO2, respectively. Additionally, this 3D-OMNiSA catalyst shows a high durability under harsh water oxidation cycling test. The outstanding OER performance of the 3D-OMNiSA could be attributed to the large surface area, efficient mass and charge transport, and high structural stability arising from the unique 3D hierarchical porous structure of the 3D-OMNiSA consisting of ordered close-packed mesoporous spheres.
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