新型炭材料（中英文）2026，Vol.41Issue(3)：664-674,11.DOI:10.1016/S1872-5805(26)61095-5
电化学重构NiOOH/NiFeV-LDH@CC用于高效析氧反应
Electrochemically activated NiOOH/NiFeV-LDH@CC for a highly efficient oxygen evolution reaction
摘要
Abstract
The surface reconstruction of NiFe-based layered double hydroxide(LDH)electrocatalysts has been widely studied.The reconstructed NiOOH phase plays a critical role in improving the oxygen evolution reaction(OER)perform-ance of NiFe-based LDHs,but observing the NiOOH phase is difficult because of its instability and exploring the functional mechanism of NiOOH in NiFe-based LDHs remains a great challenge.A simple electrochemical activation was used to synthesize a NiOOH/NiFeV-LDH@CC catalyst consisting of an array of V-doped NiFe-LDH nanosheets on carbon cloth(CC),in which the reconstructed NiOOH phase is the active species.During electrochemical activation,the release of doped V leads to the formation of abundant vanadium vacancy(VV)and oxygen vacancy(VO)species,and thus the surface of the NiFe-LDH nanosheets is reconstructed to form NiOOH.Because of the improved intrinsic activity from the NiOOH active phase,and the increased electrical conductivity produced by the abundant VO,NiOOH/NiFeV-LDH@CC has an excellent OER performance in an alkaline solution,with low overpotentials of 209 mV and 241 mV at 20 mA cm-2 and 100 mA cm-2,respect-ively.It also has a long-term stability of 80,000 s at a constant current density of 10 mA cm-2.Using NiOOH/NiFeV-LDH@CC as the anode,an assembled over water splitting(OWS)battery can drive a current density of 20 mA cm-2(without iR compens-ation)at a much lower voltage of 1.597 V.At the same time,the electrolytic cell can deliver a current density of 10 mA cm-2 at～1.55V for more than 80,000 s without significant loss.This electrochemical activation method can be used in future designs of electrocatalysts for OER.关键词
钒掺杂/NiFe 基层状氢氧化物/电化学重构/NiOOH/析氧反应Key words
V doping/NiFe-based Layered double hydroxides/Electrochemical reconstruction/NiOOH/Oxygen evolu-tion reaction分类
化学化工引用本文复制引用
宋宇婕,岳云飞,沈志超,侯莹,宋艳慧,刘培植,许并社,章海霞,郭俊杰..电化学重构NiOOH/NiFeV-LDH@CC用于高效析氧反应[J].新型炭材料（中英文）,2026,41(3):664-674,11.基金项目
This work was supported by National Natural Science Foundation of China(52572032,52271064,52571251,52201019,U21A20174),Major Science and Technology Project of Shanxi Province(20201102003),Science and Technology Innovation Talent Team Project of Shanxi Province(202304051001010),Key National Scientific and Technological Cooperation Projects of Shanxi Province(202104041101008)and Natural Science Foundation of Shanxi Province(202203021211168,202203021211138,202303021221257).The authors acknowledge the assistance of Instrumental Analysis Center Taiyuan University of Technology. （52572032,52271064,52571251,52201019,U21A20174）
