Co_(9)S_(8)/Cu_(2)S/CF纳米阵列的制备及其电化学析氢性能  

Co_(9)S_(8)/Cu_(2)S Nanorod Arrays on Cu Foam as Highly Efficient Electrocatalyst for Hydrogen Evolution Reaction

作　　者：施华锋 朱佳伟 SHI Huafeng;ZHU Jiawei(Anhui Police College,230031,Hefei,Anhui,China;School of Physics and Electronic Information,Huaibei Normal University,235000,Huaibei,Anhui,China)

机构地区：[1]安徽省公安学院,安徽合肥230031 [2]淮北师范大学物理与电子信息学院,安徽淮北235000

出　　处：《淮北师范大学学报（自然科学版）》2024年第3期30-37,共8页Journal of Huaibei Normal University：Natural Sciences

基　　金：安徽省高校自然科学研究重点项目(2022AH052550)。

摘　　要：过渡金属硫属化合物因其组成、结构和功能的特殊性,在电解水析氢高效电催化剂制备领域受到广泛关注。采用溶剂热法在泡沫铜基底上制备出Co_(9)S_(8)/Cu_(2)S/CF纳米复合材料。借助X射线衍射(XRD)、扫描电镜(SEM)以及透射电镜(TEM)等分析手段对材料进行详细表征并探究其电解水析氢性能。在0.5 mol/L H_(2)SO_(4)溶液、磷酸盐缓冲溶液(PBS)和1 mol/L KOH溶液中,只需要82 mV、117 mV和153 mV过电位就可以达到10 mA·cm^(-2)。此外,该催化剂在历经多次电化学析氢反应后,其过电位值无明显变化,具有优异的电化学稳定性。相较于单一Cu_(2)S与Co_(9)S_(8)材料,复合催化剂Co_(9)S_(8)/Cu_(2)S在催化活性上有较大程度提高。Transition metal chalcogenides has been widely used in the preparation of high-efficiency electrocatalysts for hydrogen evolution by electrolysis due to their special composition,structure and function.In this work,Co_(9)S_(8)/Cu_(2)S/CF nanocomposites were prepared on copper foam substrate by solvothermal method.The as-obtained materials were characterized by X-ray diffraction(XRD)、scanning electron microscope(SEM)and transmission electron microscopy(TEM)and their hydrogen evolution properties were investigated.In 0.5 mol/L H_(2)SO_(4) solution,phosphate buffer solution(PBS),and 1 mol/L KOH solution,to reach10 mA.cm^(-2),overpotentials was only 82 mV,117 mV and 153 mV.In addition,the overpotential of the catalyst did not change significantly after hydrogen evolution reactions,indicating that the as-prepared catalyst had excellent electrochemical stability.Compared with the single Cu_(2)S and Co_(9)S_(8) materials,the catalytic activity of Co_(9)S_(8)/Cu_(2)S catalyst has a greater degree of improvement,which is mainly due to the catalytic activity of Co_(9)S_(8) and Cu_(2)S and the synergistic effect of Co-Cu.

关 键 词：电解水 自支撑电极 Co_(9)S_(8)/Cu_(2)S 溶剂热法 

分 类 号：O614.0[理学—无机化学]