Co9S8/Cu2S/CF纳米阵列的制备及其电化学析氢性能
Co9 S8/Cu2 S Nanorod Arrays on Cu Foam as Highly Efficient Electrocatalyst for Hydrogen Evolution Reaction
施华锋 1朱佳伟2
作者信息
- 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
- 折叠
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Co9S8/Cu2S/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 H2SO4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Cu2S与Co9S8材料,复合催化剂Co9S8/Cu2S在催化活性上有较大程度提高.
Abstract
Transition metal chalcogenides has been widely used in the preparation of high-efficiency electro-catalysts for hydrogen evolution by electrolysis due to their special composition,structure and function.In this work,Co9S8/Cu2S/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 investigat-ed.In 0.5 mol/L H2SO4 solution,phosphate buffer solution(PBS),and 1 mol/L KOH solution,to reach 10 mA.cm-2,overpotentials was only 82 mV,117 mV and 153 mV.In addition,the overpotential of the cata-lyst did not change significantly after hydrogen evolution reactions,indicating that the as-prepared catalyst had excellent electrochemical stability.Compared with the single Cu2S and Co9S8 materials,the catalytic activ-ity of Co9S8/Cu2S catalyst has a greater degree of improvement,which is mainly due to the catalytic activity of Co9S8 and Cu2S and the synergistic effect of Co-Cu.
关键词
电解水/自支撑电极/Co9S8/Cu2S/溶剂热法Key words
water splitting/self-supporting electrode/Co9S8/Cu2S/solvothermal method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据