非晶态Pt-CoSn合金上的甲醇电催化氧化  

Amorphous CoSn alloy decorated by Pt for methanol oxidation

作　　者：张想泰[1] 王辉[1] 张哲[1] 雷自强[1] 王荣方[1] 

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,甘肃兰州730070

出　　处：《电源技术》2012年第4期507-510,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金项目(21163018);甘肃省自然科学基金(1010RJZA024);西北师范大学科学和技术创新项目(NWNU-kjcxgc-03-63)

摘　　要：为了研究Pt修饰非晶态催化剂对甲醇电催化氧化行为的影响,采用两步法合成了碳载Pt修饰非晶态CoSn合金催化剂。使用透射电镜和X射线衍射技术分析了CoSn/C前体和Pt-CoSn/C催化剂的形貌及晶体结构;利用循环伏安法和旋转圆盘电极技术测试电化学性能,比较了Pt/C、PtRu/C和Pt-CoSn/C催化剂对甲醇氧化的电催化活性和稳定性。结果表明,Pt修饰非晶态CoSn合金催化剂对甲醇氧化有较好的电催化性能,Pt用量显著降低。非晶态CoSn合金具有良好的质子和电子传导能力,提高了Pt对甲醇氧化的电催化活性;Pt-CoSn/C对甲醇电催化的质量活性和稳定性要优于PtRu/C催化剂。In order to study the electro-catalytic behaviour of methanol electro-oxidation reaction with Pt decorating amorphous CoSn alloys, Pt decorating amorphous CoSn alloys catalyst supported on carbon （denote as Pt-CoSn/C） was prepared by the two-stage chemical synthesis. The structure of Pt-CoSn/C catalyst was confirmed by the transmission electron microscopy （TEM） and X-ray diffraction （XRD）. Under the same quality of noble metal, the Pt-CoSn/C catalyst had higher mass activity than Pt/C and PtRu/C catalysts in cyclic voltammetry for methanol oxidation. The structure of Pt decorating amorphous CoSn alloys could not only obviously decrease the usage of Pt but also enhance its catalytic activity.

关 键 词：燃料电池 非晶态合金 甲醇氧化 修饰型催化剂 

分 类 号：TM911[电气工程—电力电子与电力传动]