燃料化学学报2017，Vol.45Issue(4)：475-483,9.
碳纳米管负载的纳米Pd-Ag催化剂对乙醇和丙醇氧化的电化学活性
Catalytic activity of Pd-Ag nanoparticles supported on carbon nanotubes for the electro-oxidation of ethanol and propanol
摘要
Abstract
Pd and Pd-Ag nanoparticles supported on multi-walled carbon nanotubes ( MWCNT) were prepared by using the NaBH4 reduction method in a mixed solvent of ethylene glycol and water; their catalytic activity for the electro-oxidation of ethanol, n-propanol and iso-propanol was investigated in alkaline media by the voltammetric method. The results indicate that Pd and Pd-Ag nanoparticles are well-dispersed on the surface of MWCNTs and the average sizes of metal particles on the Pd/MWCNT, Pd4 Ag1/MWCNT, Pd2 Ag1/MWCNT and Pd1 Ag1/MWCNT catalysts are 7, 4, 7 and 11 nm, respectively. Over these catalysts, the electro-oxidation of n-propanol exhibits larger current density than the oxidation of ethanol and iso-propanol. Moreover, the binary Pdn Ag1/MWCNT catalysts (n=4, 2, 1), especially Pd4Ag1/MWCNT, gives higher current density for the oxidation of ethanol and propanols than the Pd/MWCNT catalyst, suggesting that the addition of Ag can enhance the activity of Pd-based catalyst for the electro-oxidation of alcohols. The excellent activity of binary Pd-Ag/MWCNT catalysts is probably attributed to the weak absorption of intermediate species on Pd due to the interaction between Pd and Ag, which may promote the oxidation of alcohols.关键词
钯/碳纳米管/燃料电池/醇氧化/电催化活性Key words
palladium/multi-walled carbon nanotube/fuel cell/alcohol oxidation/electrocatalysis分类
化学化工引用本文复制引用
张媛媛,易清风,楚浩,聂会东..碳纳米管负载的纳米Pd-Ag催化剂对乙醇和丙醇氧化的电化学活性[J].燃料化学学报,2017,45(4):475-483,9.基金项目
The project was supporded by the National Natural Science Foundation of China (21376070), Hunan Provincial Natural Science Foundation of China (14JJ2096) and A Project supported by Scientific Research Fund of Hunan Provincial Education Department (11K023).国家自然科学基金(21376070),湖南省自然科学基金(14JJ2096)和湖南省高校创新平台开放基金(11K023)资助 （21376070）
