期刊
INORGANIC CHEMISTRY FRONTIERS
卷 5, 期 8, 页码 1886-1893出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qi00333e
关键词
-
资金
- Natural Science Foundation of Hebei Province [B2016208108]
- Foundation of Educational Committee of Hebei Province [QN2016061]
- Foundation of Hebei University of Science and Technology [1181156, 2014PT94]
- Jilin University [2015-21]
Hollow cobalt nickel oxide microspheres assembled by ultrathin porous nanosheets with tunable Co/Ni molar ratios have been successfully synthesized via a facile self-template method, taking solid bimetallic alkoxide microspheres as a precursor. The compositions and the sizes of the hollow cavities of cobalt nickel oxides can be easily controlled by the Co/Ni molar ratios and the size of bimetallic alkoxide microspheres, respectively. The electrochemical measurements indicate that the cobalt nickel oxide catalysts exhibit greatly enhanced oxygen evolution reaction (OER) activity in alkaline media, and Co-2-Ni-1-O microspheres with the optimal composition show the lowest overpotential (approximate to 310 mV for 10 mA cm(-2)) and the smallest Tafel slope (57 mV per decade). This is attributed to the large electrochemically reactive surface and good charge conduction offered by the synergetic effects between their unique structural features and tunable compositions. The hollow cobalt nickel oxide microspheres may serve as promising noble-metal-free OER electrocatalysts to replace IrOx material, and the synthetic strategy that directs structural design can be applied to prepare other multifunctional materials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据