Exciting lattice oxygen of nickel-iron bi-metal alkoxide for efficient electrochemical oxygen evolution reaction

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：High efficiency,cost-effective and durable electrocatalysts are of pivotal importance in energy conversion and storage systems.The electro-oxidation of water to oxygen plays a crucial role in such energy conver-sion technologies.Herein,we report a robust method for the synthesis of a bimetallic alkoxide for effi-cient oxygen evolution reaction(OER)for alkaline electrolysis,which yields current density of 10 mA cm-2 at an overpotential of 215 mV in 0.1 M KOH electrolyte.The catalyst demonstrates an excel-lent durability for more than 540 h operation with negligible degradation in activity.Raman spectra revealed that the catalyst underwent structure reconstruction during OER,evolving into oxyhydroxide,which was the active site proceeding OER in alkaline electrolyte.In-situ synchrotron X-ray absorption experiment combined with density functional theory calculation suggests a lattice oxygen involved elec-trocatalytic reaction mechanism for the in-situ generated nickel-iron bimetal-oxyhydroxide catalyst.This mechanism together with the synergy between nickel and iron are responsible for the enhanced cat-alytic activity and durability.These findings provide promising strategies for the rational design of non-noble metal OER catalysts.

外文关键词：

Oxygen evolution reactionNickel-iron bi-metal alkoxideLattice oxygen-mediated reaction mechanismAlkaline electrolysisElectrocatalysts

作者：

Saihang Zhang、Senchuan Huang、Fengzhan Sun、Yinghui Li、Li Ren、Hao Xu、Zhao Li、Yifei Liu、Wei Li、Lina Chong、Jianxin Zou

展开 >

作者单位：

National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composites,Center of Hydrogen Science,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

Department of Chemistry,Laboratory of Advanced Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,iChEM and State Key Laboratory of Molecular Engineering of Polymers,College of Chemistry and Materials,Fudan University,Shanghai 200433,China

基金：

staff at Beamline of the Shanghai Synchrotron Radiation Facility(SSRF)staff at Beamline of the Shanghai Synchrotron Radiation Facility(SSRF)National Key Research & Development Program of ChinaNational Natural Science Foundation of ChinaOverseas Outstanding Youth Fund and Shanghai Pujiang Talent ProjectCenter of Hydrogen Science,Shanghai Jiao Tong University

项目编号：

BL08U1-ABL11B2022YFB38037005217118621PJ1408500

出版年：

2024

DOI：

10.1016/j.jechem.2023.09.013

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.88(1)

参考文献量52