镍基复合镀层对析氢反应的电催化活性

THE ELECTROCATALYSIS FOR PROTON REDUCTION OF Ni BASED COMPOSITE PLATING LAYER

自从六十年代以来,电极作为一种电催化剂,其重要性逐渐受到人们的重视.认识到研究和改善电极的电催化性能,对于能源的开发利用,及其它生产实际应用有很大的经济意义.因此,为了寻找价格低廉的非贵金属催化剂,以及提高现有电极的电催化性能,人们已做了大量的工作.催化电极的材料由单一的金属、合金,逐步发展到使用一些碳化物、氧化物、复合氧化物等,并且已注重使用复合材料.提出了一些制备复合电极的新方法.如离子注入法、浸渍法、烧结法、化学吸附法等.用这些方法制备出的复合电极均不同程度地提高了电极的催化活性。

In this study, Ni-ZrO_2 and Ni-WC composite electrodes were prepared with thetechnique of composite electroplating, and used in the cathodic reduction reaction ofH^+ in acid solution. The electrocatalytic properties and true surface area of theelectrodes were determined by electrochemical and physical methods. It was foundthat the composite electrods had higher catalytic activity than pure Ni platedelectrode for reduction reaction of H^+. The effect of content of the particles in thecomposite electrodes on the electrocatalytic property of the electrodes was discussed.Our results suggest that there is a possibility of preparing various new types ofcomposite electrode with electrocatalytic activities for certain redoxreaction systemsthrough the technique of composite electroplating by selecting proper materials.