电沉积制备Co/W催化剂及其电催化析氢性能的研究
Preparation of Co/W catalyst by electrodeposition and study on its performance in electrocatalytic hydrogen evolution
以泡沫镍(NF)为基底,通过电沉积法制备了Co/W@NF催化剂。对样品进行了X射线衍射(XRD)、扫描电子显微镜(SEM)、电化学阻抗谱(EIS)、循环伏安(CV)、线性伏安(LSV)等表征,并测试了其在恒电流密度下的循环稳定性能。结果表明,电沉积合成的Co/W@NF催化剂表面具有疏松多孔的三维网络结构和纳米线状微观形貌。在碱性环境中,表现出卓越的电催化性能,在10 mA/cm2的电流密度下,过电位仅为174 mV,Tafel斜率为189 mV/dec,具有更快的析氢反应动力学,表现出优异的催化析氢性能。
Co/W@NF catalyst is fabricated via electrodeposition method with a foam nickel as substrate,and characterized by means of X-ray diffraction (XRD),scanning electron microscopy (SEM),electrochemical impedance spectroscopy (EIS),cyclic voltammetry (CV),and linear sweep voltammetry (LSV).Additionally,its cyclic stability is evaluated under constant current density.The findings reveal that Co/W@NF catalyst synthesized through electrodeposition method possesses a loose porous three-dimensional network structure and exhibits a nanowire-like microscopic morphology on its surface.In an alkaline environment,Co/W@NF catalyst demonstrates exceptional electrocatalytic performance,presenting an overpotential of merely 174 mV and a Tafel slope of 189 mV·dec-1 at a current density of 10 mA·cm-2.It also displays a fast hydrogen evolution reaction kinetics and showcases an outstanding catalytic hydrogen evolution performance.
hydrogen evolution reaction / bimetal / electrocatalysis / non-precious metal catalyst
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张一鸣, 郭建平, 张家乐, |
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陈凯, 吴锋顺, 肖顺, |
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内蒙古科技大学基本科研业务费专项资金资助(2023QNJS062)
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