燃烧法快速制备CoFe_(2)O_(4)纳米球及其电催化析氢性能  

Rapid preparation of CoFe_(2)O_(4) sphere-like nanomaterial by a rapid combustion method and its electrocatalytic performance for hydrogen evolution

作　　者：石煜 吴舒琪 邹泽华 高凤 汪庆祥 SHI Yu;WU Shuqi;ZOU Zehua;GAO Feng;WANG Qingxiang(School of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou,Fujian 363000,China)

机构地区：[1]闽南师范大学化学化工与环境学院,福建漳州363000

出　　处：《闽南师范大学学报（自然科学版）》2024年第4期37-46,共10页Journal of Minnan Normal University：Natural Science

基　　金：福建省自然科学基金(2022J05170)。

摘　　要：制备兼具稳定性和活性的电解水催化剂是大规模制氢的关键环节.通过快速燃烧法,在双金属泡沫镍铜(NCF)表面原位合成了Co Fe_(2)O_(4)纳米球.通过X射线衍射(XRD)和扫描电子显微镜(SEM)对材料的结构和组成进行了表征.采用线性扫描伏安法(LSV)考察了该材料在碱性环境下对电解水析氢反应(HER)的催化性能.结果显示,析氢反应达到10 m A·cm^(-2)电流密度所需的过电位仅为148 m V,Tafel斜率为197 m V·dec^(-1),明显优于裸NCF和单金属对照材料.稳定性测试实验表明,经过2 000次循环伏安扫描后,析氢反应LSV曲线与与原始曲线基本一致;同时在100 m A·cm^(-2)的电流密度持续电解25 h,电位不发生明显变化,表明该催化剂具有良好的电催化稳定性.The preparation of catalysts that possess both high stability and activity for electrolysis of water is a key step for the large-scale hydrogen production.Herein,the CoFe_(2)O_(4) nanospheres were insitu synthesized on the surface of the bimetallic nickel-copper foam(NCF).The structure and composition of the material were characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM).The catalytic performance of the material for the hydrogen evolution reaction(HER)in an alkaline environment was investigated using linear sweep voltammetry(LSV).The results show that the overpotential required for the HER to reach a current density of 10 mA×cm^(-2) is only 148 mV with a Tafel slope of 197 mV×dec^(-1).significantly outperforming bare NCF and single-metal control materials.Stability tests indicate that after 2000 cycles of cyclic voltammetry scans,the LSV curve for the HER is essentially consistent with the original curve.Simultaneously,under a continuous electrolysis at a current density of 100 mA×cm^(-2) for 25 hours,the potential does not change significantly,indicating that the catalyst possesses good electrocatalytic stability.

关 键 词：泡沫镍铜 CoFe_(2)O_(4) 快速燃烧法 电催化 析氢反应 

分 类 号：O614[理学—无机化学]