过电位
氢氧化物
层状双氢氧化物
硼
催化作用
析氧
离子
热液循环
化学工程
吸附
材料科学
无机化学
化学
电化学
有机化学
电极
物理化学
工程类
作者
Zemin Sun,Yu-Tong Wang,Lin Liu,Mengwei Yuan,Honglu Jiang,Run Long,Shengsong Ge,Caiyun Nan,Huifeng Li,Genban Sun,Xiaojing Yang
摘要
NiFe layered double hydroxides (NiFe-LDHs) have been regarded as significant electrocatalysts for the oxygen evolution reaction (OER). However, their overpotential must still be further reduced to enable commercial applications. Herein, a promising and highly effective "hydroxyl ions hungry" electrode structure was prepared for the first time via a two-step hydrothermal reaction procedure to enhance the surface adsorption kinetics to obtain an ultralow overpotential. The electrode exhibits OER activity with ultralow overpotentials of 203 mV and 293 mV at the current densities of 10 mA cm-2 and 100 mA cm-2, respectively, in 1.0 M KOH. These results reveal an important way to improve the catalytic performance in an alkaline medium.
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