摘要
Advancing efficient and affordable electrocatalysts to boost the oxygen evolution reaction(OER)is pivotal for sustainable green hydrogen production.Herein,we propose the fabrication of nickel-iron alloy nanoparticles-encapsulated on N-doped vertically aligned graphene array on carbon cloth(NiFe@NVG/CC)as a highly active three-dimensional(3D)catalyst electrode for OER.In 1 M KOH,such NiFe@NVG/CC demonstrates outstanding catalytic performance,necessitating merely overpotential of 245 mV for achieving a current density of 10 mA·cm^(−2),a remarkably low Tafel slope of 36.2 mV·dec^(−1).Furthermore,density functional theory calculations validate that the incorporate of N species into graphene can reinforce the electrocatalytic activity though reducing the reaction energy barrier during the conversion of*O to*OOH intermediates.The outstanding performance and structural benefits of NiFe@NVG/CC offer valuable insights for the development of innovative and efficient electrocatalysts for water oxidation.
基金
the National Natural Science Foundation of China(Nos.52202214,52001059,52001059,and 52202215)
Sichuan Natural Science Foundation(No.23NSFSC3565)
China National Postdoctoral Program for Innovative Talents(No.BX2021053)
China Postdoctoral Science Foundation(No.2021M700680).
作者简介
Address correspondence to Xuping Sun,xpsun@uestc.edu.cn;Address correspondence to Yongqi Zhang,yqzhang@uestc.edu.cn。
