Pd/TiC-C催化剂对甲酸氧化的电催化性能  

Electrocatalytic Performance of Pd Catalyst on Composite Supporter of TiC and Carbon for Oxidation of Formic Acid

作　　者：汪福明[1] 唐亚文[1] 刘长鹏[2] 邢巍[2] 陆天虹[1,2] 

机构地区：[1]江苏省生物功能材料重点实验室,南京师范大学化学与环境科学学院,南京210097 [2]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》2009年第7期831-834,共4页Chinese Journal of Applied Chemistry

基　　金：科技部“八六三”计划项目(2006AA05Z137,2007AA05Z143,2007AA05Z159);国家自然科学基金(20433060,20573057,20703043)资助项目

摘　　要：研究了TiC和C作混合载体的Pd(Pd/TiC-C)催化剂对甲酸氧化的电催化性能。发现Pd/TiC-C催化剂对直接甲酸燃料电池(DFAFC)中甲酸氧化的电催化性能要优于Pd/C催化剂。而且,Pd/TiC-C催化剂的电催化性能与C和TiC的质量比有关,当m(C)∶m(TiC)=2∶1时,Pd/TiC-C催化剂对甲酸氧化的电催化活性和稳定性最好,甲酸在C和TiC的质量比为2∶1的Pd/TiC-C催化剂电极上的氧化峰峰电位为0.164V,比在Pd/C催化剂电极上负移12mV,峰电流密度为23.08×10-3A/cm2,比在Pd/C催化剂电极上高约42%。The electrocatalytic performance of Pd/TiC-C catalysts for the oxidation of formic acid was investigated. It was found that the electrocatalytic performance of Pd/TiC-C catalysts for the oxidation of formic acid in the direct formic acid fuel cell （DFAFC） is better than that of Pd/C catalyst. Furthermore, the electrocatalytic performance of Pd/TiC-C catalysts is related to the mass ratio of C and TiC. When the mass ratio of C and TiC is 2： 1, the electroeatalytic activity and stability of Pd/TiC-C catalyst is the best. The peak potential of the oxidation of formic acid at Pd/TiC-C catalyst with a mass ratio of 2：1 is located at 0. 164 V, which is 12 mV more negative than that at Pd/C catalyst electrode. The peak current density is 23.08 × 10^ -3 A/cm^2, which is 42% larger than that at Pd/C catalyst electrode.

关 键 词：碳化钛 钯 活性炭 直接甲酸燃料电池 

分 类 号：O613.7[理学—无机化学]