过电位
析氧
非阻塞I/O
催化作用
材料科学
吸附
缩放比例
分解水
化学工程
交叉口(航空)
镍
物理化学
化学
电化学
有机化学
冶金
工程类
航空航天工程
光催化
数学
电极
几何学
作者
Gao Zuo-ning,Jieyu Liu,Xuemin Chen,Xueli Zheng,Jing Mao,Hui Liu,Tian Ma,Li Lan,Wang Weichao,Xi‐Wen Du
标识
DOI:10.1002/adma.201804769
摘要
Abstract Oxygen evolution reaction (OER) is a pivotal reaction in many technologies for renewable energy, such as water splitting, metal–air batteries, and regenerative fuel cells. However, this reaction is known to be kinetically sluggish and proceeds at rather high overpotential due to the universal scaling relationship, namely, the adsorption energies of intermediates are linearly correlated and cannot be optimized simultaneously. Several approaches have been proposed to break the scaling relationship by introducing additional active sites; however, positive experimental results are still absent. Herein, a different solution is suggested on the basis of dynamic tridimensional adsorption of the OER intermediates at NiO/NiFe layered double hydroxide intersection, by which the adsorption energy of each intermediate can be adjusted independently, so as to bypass the scaling relationship and achieve high catalytic performance. Experimentally, the OER overpotential is reduced to ≈205 mV at current density of 30 mA cm −2 , which represents the best performance achieved by state‐of‐the‐art OER catalysts.
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