Pd-Ru/Ni(泡沫镍)作为Mg-H_2O_2半燃料电池阴极的研究  

A Study of Pd-Ru on Nickel Foam Cathode for Magnesium-hydrogen Peroxide Semi-fuel Cells

作　　者：孙丽美[1] 张铖[1] 李慧婷[1] 赵焱[1] 

机构地区：[1]内蒙古民族大学化学化工学院,内蒙古通辽028000

出　　处：《贵金属》2011年第4期1-5,共5页Precious Metals

基　　金：国家自然科学基金(21003070);内蒙古民族大学博士开放基金(BS232)资助项目

摘　　要：以泡沫镍为基体,采用恒电流沉积法制备了Pd-Ru/Ni(泡沫镍)催化剂。SEM表征发现,Pd-Ru粒子直径约为200 nm,均匀分布在泡沫镍骨架表面,Pd∶Ru原子比为6∶1。线性电势扫描伏安法研究表明:Pd-Ru/Ni(泡沫镍)电极对H2O2电还原反应具有较高的催化性能,起始还原电势可达0.84 V。常温(25℃)下,当H2O2浓度为0.4 mol/L时,以Pd-Ru/Ni为阴极,AZ31镁合金为阳极的Mg-H2O2半燃料电池,最大功率密度为195 mW/cm2,对应的电池电压可达1.25 V。The Pd - Ru/Ni electrodes were prepared by electrodeposition of Pd and Ru on the nickel foam surface. The structure and composition of the Pd - Ru catalysts were analyzed using SEM. The cata- lytic performance of Pd - Ru/Ni for H2O2 electroreduction at different concentrations of H2O2 were investigated by linear potential sweep method. The magnesium - hydrogen peroxide semi -fuel cells using AZ31 magnesium alloys as anode and Pd- Ru/Ni as cathode were assembled and tested. It was found that the fuel cell with 0.4 mol/L H2O2 demonstrats a maximum power density of 195 mW/cm^2 and the corresponding cell voltage is 1.25 V.

关 键 词：物理化学 H2O2 Pd—Ru/Ni催化剂 电沉积 Mg—H2O2半燃料电池 

分 类 号：O643.36[理学—物理化学]