Structure deformation of Ni-Fe-Se enables efficient oxygen evolution via RE atoms doping  

作　　者：Hong-Rui Zhao Cheng-Zong Yuan Cong-Hui Li Wen-Kai Zhao Fu-Ling Wu Lei Xin Hong Yin Shu-Feng Ye Xiao-Meng Zhang Yun-Fa Chen 

机构地区：[1]Jiangxi Province Research Institute of Rare Earths,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou,341119,China [2]School of Rare Earths,University of Science and Technology of China,Hefei,230026,China [3]Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials,School of Chemistry and Chemical Engineering,Hunan Institute of Science and Technology,Yueyang,414006,China [4]State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Rare Metals》2025年第1期336-348,共13页稀有金属(英文版)

基　　金：supported by the National Key Technology R&D Program of China(Nos.2021YFB3500801,2022YFB3504302 and 2022YFC3901503);the Natural Science Foundation and Overseas Talent Projects of Jiangxi Province(Nos.0232BAB214025 and 20232BCJ25044);the Double Thousand Plan of Jiangxi Province(No.jxsq2023201002).

摘　　要：The development of cost-effective and highly stable electrocatalysts for oxygen evolution reactions holds paramount importance in practical hydrogen production.Herein,we present a novel self-supported electrode comprising Ce-doped Ni-Fe-Se nanosheets grown on carbon cloth(Ni-Fe-Ce-Se/CC).This electrode was synthesized through a selenylation process,utilizing Ni-Fe-Ce-layered double hydroxide/carbon cloth(Ni-Fe-Ce LDH/CC)as the precursor.Notably,Ni-Fe-Ce-Se/CC electrode demonstrates remarkable performance,requiring a low overpotential of 300 mV to attain a current density of 100 mA·cm^(-2)under harsh alkaline conditions.Furthermore,the electrode exhibits exceptional stability during continuous operation for 100 h.Insight into the underlying mechanisms was gained through a combination of experimental results and density functional theory calculations.Our findings reveal that Ce doping induces crystal structure deformation in Ni-Fe-Se and enhances electron enrichment around Ni atoms.This structural modification optimizes the adsorption energy of oxygen-based intermediates on the Ni-Fe-Se surface.This work offers a valuable strategy for regulating the electron transfer and adsorption capabilities of transition metal selenide electrocatalysts through RE atoms doping,opening new avenues for enhanced electrocatalytic performance.

关 键 词：Ce doping Structure deformation Ni-Fe-Se Electron transfer Oxygen evolution 

分 类 号：O64[理学—物理化学]