泡沫镍基Ni-S-Co涂层电极在碱性介质中的电催化析氢性能  

Electrocatalytic properties of Ni-S-Co coatings electrodeposited on nickel foam substrate for hydrogen evolution in alkaline medium

作　　者：周科朝[1] 袁铁锤[1] 李瑞迪[1] 何捍卫[1] 黄冠[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2007年第2期186-189,共4页Journal of Central South University:Science and Technology

基　　金：国家高技术研究发展计划资助项目(2003AA305980)

摘　　要：以泡沫镍为基体采用电沉积法制备非晶态Ni-S-Co合金涂层电极。以扫描电镜(SEM)和X射线衍射(XRD)观察表面形貌和微观结构,电化学测试方法分析涂层的电化学行为。结果表明,所获得的镀层为非晶态结构,表面颗粒细小且具有丰富的表面积;非晶态Ni-S-Co合金电极的析氢催化性能较好,与Ni和Ni-S电极相比具有较低的析氢过电位、较高的交换电流密度和较低的表观活化能;经过KOH碱溶液活化处理后,镀层表面颗粒变细,活性表面积增加,析氢性能有所增强。Amorphous Ni-S-Co alloy coating was prepared by means of chemical electrodepostion method on foam nickel matrix. The surface morphologies and microstructures of Ni-S-Co coatings were observed by SEM and XRD, and the electrochemical properties were tested using electrochemical methods. The results show that the coating is amorphous structure and the particles in surface are fined with large specific surface area, The Ni-S-Co alloy is catalytically more active in comparison with Ni and Ni-S electrode with its lower potential for hydrogen evolution, higher exchange current density and lower activation energy. The hydrogen evolution reaction （HER） is enhanced, the particles in surface are smaller and the surface area is larger after activated by KOH alkaline solution,

关 键 词：非晶态合金 电沉积 析氢反应 Ni-S-Co涂层 

分 类 号：TQ153.2[化学工程—电化学工业]