塔菲尔方程
析氧
过电位
催化作用
氢氧化物
分解水
电解水
化学
磷酸盐
化学工程
无机化学
材料科学
电解
有机化学
电化学
光催化
电极
物理化学
电解质
工程类
作者
Shunfa Zhou,Yuxuan Liu,Jing Li,Zhao Liu,Jiawei Shi,Limin Fan,Weiwei Cai
标识
DOI:10.1016/j.gee.2022.12.003
摘要
Developing highly active oxygen evolution reaction (OER) electrocatalysts with robust durability is essential in producing high-purity hydrogen through water electrolysis. Layered double hydroxide (LDH) based catalysts have demonstrated efficient catalytic performance toward the relatively sluggish OER. By considering the promotion effect of phosphate (Pi) on proton transfer, herein, a facile phosphate acid (PA) surface-neutralization strategy is developed to in-situ construct NiCo-LDH/NiCoPi hetero-sheets toward OER catalysis. OER activity of NiCo-LDH is significantly boosted due to the proton promotion effect and the electronic modulation effect of NiCoPi. As a result, the facilely prepared NiCo-LDH/NiCoPi catalyst displays superior OER catalytic activity with a low overpotential of 300 mV to deliver 100 mA cm−2 OER and a Tafel slope of 73 mV dec−1. Furthermore, no visible activity decay is detected after a 200-h continuous OER operation. The present work, therefore, provides a promising strategy to exploit robust OER electrocatalysts for commercial water electrolysers.
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