期刊
INORGANIC CHEMISTRY
卷 57, 期 5, 页码 2766-2772出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.7b03168
关键词
-
资金
- Postdoctoral Science Foundation of China [2016M600008]
- National Science Foundation of China [51602009]
- Natural Science Foundation of Guangdong Province [2015A030310138]
- Shenzhen and Guangdong Research Grant [2015B090927003, JCYJ20160226105838578]
Oxygen evolution reaction (OER), as the critical step in splitting water, is a thermodynamically up-hill process and requires highly efficient catalysts to run. Arrhenius' law suggests that the higher temperature, the faster the reaction rate, so that a larger OER current density can be achieved at a lower eta. Herein, we report an abnormal temperature effect on the performance of Co-based catalysts, e.g., Co3O4, Li2CoSiO4, and Fe-doped Co(OH)(x), in OER in alkaline electrolytes. The OER performance reached a maximum when the temperature increased to 65 degrees C, and the OER performance declined when the temperature became higher. The mechanism was investigated by using Co3O4 as a model sample, and we propose that at an optimal temperature (around 55-65 degrees C) the main rate-determining step changes from OH- adsorption dominant to a mixed mode and both the adsorption and the cleavage of the OH group can be rate-determining, which leads to the fastest kinetics.
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