过电位
层状双氢氧化物
催化作用
电催化剂
电解水
氢氧化物
电解质
析氧
吸附
无机化学
化学工程
电解
材料科学
化学
物理化学
电化学
电极
有机化学
工程类
作者
Haopeng Feng,Jiangfang Yu,Lin Tang,Jiajia Wang,Haoran Dong,Ting Ni,Jing Tang,Wangwang Tang,Xu Zhu,Chao Liang
标识
DOI:10.1016/j.apcatb.2021.120478
摘要
The layered double hydroxides (LDHs) are considered to own great potential to serve as a catalyst for water electrolysis, while their extremely poor hydrogen evolution reaction (HER) activity limits their application. Herein, a general designing strategy to improve the HER activity of LDHs by P doping and deposition of metal nanodots (NDs) is proposed, which increases one order of magnitude higher than that of pristine LDHs. The obtained electrocatalyst, such as Cu NDs/P-FeCoLDH (CPFC-LDH), reaching a current density of 10 mA/cm2 with only 63 mV overpotential for HER in alkaline electrolyte. The adsorption energy of Hads and OH on catalyst is optimized by this strategy, which can weaken the interaction between the adsorbed Hads and electronegative oxygen in LDHs by formation of PO bonds. This work provides a strategy to develop LDHs materials with high catalytic activity for HER.
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