PdCu合金催化剂对甲酸氧化的电催化性能  

Electrocatalytic performance of PdCu catalyst for formic acid oxidation

作　　者：殷瑛[1,2,3] 刘建国[1,2,3] 陈肖宇 邹志刚[1,2,3] 王兆生 

机构地区：[1]南京大学物理学院环境材料与再生能源中心,江苏南京210093 [2]南京大学现代科学与应用工程学院材料科学与工程系,江苏南京210093 [3]南京大学固体微结构物理国家重点实验室,江苏南京210093 [4]浙江省绍兴县永利新能源研究院有限公司,浙江绍兴312028

出　　处：《电源技术》2014年第1期50-53,共4页Chinese Journal of Power Sources

基　　金：高等学校博士学科点专项科研基金资助课题(20090091120033);浙江省重大科技专项(2012C11014);浙江省绍兴县科技攻关计划项目(2012506)

摘　　要：以大规模电弧放电法制得的纳米Cu粉为原料,通过PdCl2溶液部分置换的方法合成了PdCu纳米颗粒。扫描电子显微镜法(SEM)和透射电子显微镜法(TEM)的结果表明PdCu纳米颗粒是通过自组装的方式形成了直径约为50 nm左右的空心结构。X射线衍射光谱法(XRD)结果证明Pd进入Cu的晶格,形成了PdCu合金。甲酸的循环伏安法与计时安培法测试表明Cu的存在能够大幅度提高Pd对甲酸的催化氧化性能和稳定性。Pd∶Cu比例为2∶1的PdCu合金催化剂具有最高的稳定性和活性。X射线光电子光谱法(XPS)结果表明Pd与Cu之间的强相互作用可能是催化剂活性提高的主要因素。PdCu nanoparticles were prepared by the reaction of PdCI2 and Cu powders produced by arc discharge method at room temperature. SEM and TEM results show that a hollow structure with a diameter of 50 nm through the self-assemble of PdCu nanoparticle was generated. XRD results show that PdCu alloy is formed when Pd enters the lattice of Cu. Cyclic voltammetry and chronoamperometry acid test shows that the performance and stability of Pd catalytic oxidation of formic acid can be significantly improved by the presence of Cu. The result indicates that the highest electrocatalytic activity and the best stability for formic acid electrooxidation are obtained at Pd：Cu molar ratio of 2 ： 1. XPS results show the main factor for the improving of the catalysts activity is the existence of a possible interaction between Pt and Cu.

关 键 词：PdCu合金催化剂 甲酸氧化 电催化性能 

分 类 号：TM911[电气工程—电力电子与电力传动]