碳纳米管担载PtSn阳极催化剂对乙醇的电催化氧化性能研究  

Electrocatalytic Properties of Multi-wall Carbon Nanotubes-supported PtSn Anodic Catalyst for Ethanol Electro-oxidation

作　　者：赵新生[1] 孙公权[1] 姜鲁华[1] 毛庆[1] 辛勤[1] 衣宝廉[1] 杨少华[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《高等学校化学学报》2005年第7期1304-1308,M006,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20173060);国家高技术发展规划项目(批准号:2003AA517040);中国科学院知识创新工程领域前沿项目(批准号:KGCX2-SW-310;K2003D2)资助

摘　　要：以多壁碳纳米管(MWNTs)为载体制备了担载型PtSn纳米催化剂, 对其微观形貌和电催化性能进行了表征. 透射电镜(TEM)及X射线衍射(XRD) 测试结果表明, 以MWNTs为载体提高了PtSn 金属粒子的分散度, 粒径分布范围在1.5～6.5 nm 之间, PtSn/MWNTs 催化剂的平均粒径为3.6 nm. 循环伏安、 计时电流及DEFC单池的实验结果表明, 由于MWNTs 具有独特的结构及丰富的表面基团和较高的导电率, PtSn/MWNTs催化剂对乙醇的催化氧化表现出比PtSn/XC-72更高的活性.Multi-wall carbon nanotubes(MWNTs)-supported PtSn anodic electrocatalyst was prepared for direct ethanol fuel cell(DEFC). TEM image and XRD patterns reveal that PtSn/MWNTs catalyst exhibited a high and homogeneous dispersion of metal particles with a narrow particle size distribution range from 1.5 to 6.5 nm, and the mean particles size was about 3.6 nm. The results of cyclic voltammetry(CV), chronoamperometry(CP) and single cell indicated that the PtSn/MWNTs presented a higher activity toward ethanol electro-oxidation than that of PtSn/XC-72 catalyst. The high performance could be attributed to the unique structure, higher electric properties of MWNTs, compared with that of carbon black XC-72 as the support.

关 键 词：直接乙醇燃料电池 碳纳米管 PTSN 电催化剂 

分 类 号：O643.3[理学—物理化学] TM911.4[理学—化学]