碱性体系中AuFe/C催化剂对甲醇的电化学氧化  

Electrooxidation of AuFe/C catalyst on methanol in alkaline medium

作　　者：卢利权[1] 张世超[2] 闫少辉[3] 

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]北京航空航天大学材料科学与工程学院,北京100191 [3]太原理工大学环境科学与工程学院,山西太原030024

出　　处：《电源技术》2014年第2期272-275,共4页Chinese Journal of Power Sources

基　　金：北京市自然科学基金项目(2051001);国家重点基础研究发展计划("973")项目(2013CB934001)

摘　　要：通过在水-乙醇体系并有十二烷基苯磺酸钠(DBS)存在的条件下用KBH4还原HAuCl4和FeCl3制备了AuFe/C催化剂。通过热处理和酸洗过程实现催化剂中Au和Fe的合金化及去除催化剂中未合金化的Fe。X射线衍射(XRD)测试结果显示,AuFe/C催化剂的合金化程度随着热处理温度的升高而增强。透射电镜(TEM)观测结果表明,AuFe/C催化剂中AuFe纳米粒子的粒径随着热处理温度的升高而增大。在400℃下热处理时,由于催化剂中的AuFe纳米粒子既能满足一定的合金化程度,又能保持较小的粒径,AuFe/C催化剂表现出良好的比质量和比表面积活性。The carbon supported Au-Fe （AuFe/C） catalyst was prepared by reduction of HAuCl4 and FeCl3 on the surface of activated carbon with KBH4 in the water-ethanol solution with DBS as an additive. The alloying between Au and Fe and the removal of unalloyed Fe were achieved by the heat and acid treatment. The result of X-ray powder diffraction （XRD） data indicates that the alloying degree between Au and Fe enhances with the increase in the temperature of the heat treatment. According to the result of transmission electron microscope （TEM）, the diameter of AuFe nanoparticles in the AuFe/C catalyst increases with the temperature of the heat treatment. The AuFe/C catalyst treated at 400 ℃ exhibits the excellent activity for the electrooxidation of methanol, since a good alloying state and a small size were kept by AuFe nanoparticles, simultaneity. Mass density and active surface area of AuFe nanoparticles were presented.

关 键 词：直接甲醇燃料电池 电化学催化剂 AuFe C催化剂 电化学氧化 合金化 

分 类 号：TM911.4[电气工程—电力电子与电力传动]