NiCu双金属电极电催化析氢  

Electrocatalytic Hydrogen Evolution of NiCu Double Metal Electrodes

作　　者：徐志花[1,2] 徐瑜[1,2] 严朝雄[2] 杨水彬[2] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070 [2]黄冈师范学院化工学院,湖北黄冈438000

出　　处：《微纳电子技术》2012年第3期192-196,212,共6页Micronanoelectronic Technology

基　　金：湖北省教育厅青年基金资助项目(Q20102903);湖北省自然科学基金资助项目(2009CDB010);黄冈师范学院大学生创新实验(sy200114)

摘　　要：采用恒电流共沉积方法制备了具有纳米结构的NiCu双金属电极。采用线性扫描、塔菲尔曲线、电流时间曲线及电化学阻抗谱对NiCu双金属电极电催化析氢的性能进行了测试;并且还利用X射线衍射(XRD)、扫描电子显微镜(SEM)和循环伏安测试手段对其组成、相结构和表面形貌进行了表征和分析。实验结果表明,NiCu双金属电极的电催化析氢性能明显优于Ni电极或Cu电极,这可能与Cu和Ni的协同作用有关。在所研究的NiCu双金属电极中,NiCu0.04具有较好的电化学析氢活性,这主要与其电化学反应电阻较小和比表面积较大有关。The NiCu double metal nanostructure electrodes were prepared by constant current codeposition method. The performance for electrocatalytic hydrogen evolution of the NiCu double metal electrodes was tested by linear scanning, Tafel curve, current-time curve and electrochemical impedance spectrum. The composition, phase structure and surface morphology of the NiCu double metal electrodes were characterized by X-ray diffraction （XRD）, scanning electron micro scope （SEM） and cyclic voltammetric method. The results show that the electrocatalytic hydro- gen evolution performance of the NiCu double metal is better than that of the Ni or Cu electrode, which can probably be attributed to the synergistic effect of Ni and Cu. Among the researched NiCu double metal electrodes, NiCu0.04 electrode has the better electrochemical activity for hydrogen evolution, which is mainly due to its smaller electrochemical reaction resistance and larger specific surface area.

关 键 词：析氢 催化活性 电沉积 NiCu电极 合金电极 电催化 

分 类 号：O646.5[理学—物理化学]