Surface-neutralization engineered NiCo-LDH/phosphate hetero-sheets toward robust oxygen evolution reaction  

作　　者：Shunfa Zhou Yuxuan Liu Jing Li Zhao Liu Jiawei Shi Liyuan Fan Weiwei Cai 

机构地区：[1]Sustainable Energy Laboratory,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan,430074,China [2]College of Science and Engineering,James Cook University,1 James Cook Drive,Townsville,QLD,4811,Australia

出　　处：《Green Energy & Environment》2024年第7期1151-1158,共8页绿色能源与环境（英文版）

基　　金：financial support from the National Natural Science Foundation of China(21875224 and22179121);Knowledge Innovation Program of Wuhan-Basic Research(2022010801010202);Research Fund Program of Guangdong Provincial Key Laboratory of Fuel Cell Technology(FC202201)。

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 NiCoLDH 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.

关 键 词：Oxygen evolution reaction PHOSPHATE Layered double hydroxide Hetero-sheets Stability 

分 类 号：TQ116.21[化学工程—无机化工] TQ426