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

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外文摘要：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.

外文关键词：

Oxygen evolution reactionPhosphateLayered double hydroxideHetero-sheetsStability

作者：

Shunfa Zhou、Yuxuan Liu、Jing Li、Zhao Liu、Jiawei Shi、Liyuan Fan、Weiwei Cai

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作者单位：

Sustainable Energy Laboratory,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan,430074,China

College of Science and Engineering,James Cook University,1 James Cook Drive,Townsville,QLD,4811,Australia

基金：

国家自然科学基金国家自然科学基金Knowledge Innovation Program of Wuhan-Basic ResearchResearch Fund Program of Guangdong Provincial Key Laboratory of Fuel Cell Technology

项目编号：

21875224221791212022010801010202FC202201

出版年：

2024

DOI：

10.1016/j.gee.2022.12.003

绿色能源与环境(英文)

CSTPCD

ISSN：

年,卷(期)：2024.9(7)