First Author:Zhaoyan Li

Correspondence Author:Junli Xu

Co author:Yu Zhang, Zhaoshun Liu, Hongbin Sun, Zhongning Shi

Journal:International Journal of Hydrogen Energy

Volume:51

Impact Factor:8.1

DOI number:10.1016/j.ijhydene.2023.07.095

Affiliation of Author(s):Department of Chemistry, Tsinghua University

Teaching and Research Group:物理化学

Place of Publication:ENGLAND

Abstract:Poor conductivity and low catalytic activity of NiFe layered double hydroxide (LDH) limit its application as an electrocatalyst for oxygen evolution reaction (OER). In this work, heterostructure along with oxygen vacancy and amorphous structure, which is available to the enhancement of catalytic activity were introduced in the surface of NiFe-LDH by Co and W codoping using hydrothermal method. The overpotential of OER at 50 mA cm-2 is decreased from 304 mV of NiFe-LDH to 263 mV of W0.5Co0.5@NiFe-LDH. Moreover, the existence of W6+ species in LDH can significantly improve the electrochemical kinetics of OER as well as the stability of catalyst. This work provides a new strategy to induce active sites in the surface as well as inhibit the formation of defects in the bulk so as to enhance the catalytic activity and still maintain the stability nature of catalysts.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Key Words:Oxygen evolution reaction, Layered double hydroxides, CodopingOxygen vacancy, Amorphous/crystalline structure

Document Code:WOS:001139816700001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:895-903

ISSN No.:0360-3199

Translation or Not:no