Pt-SiO_2-CNTs催化剂的制备及其对乙醇催化氧化的研究  

Preparation and Electrocatalytic Properties of PtSiO_2-CNTs Nanocatalysts for Ethanol Electrooxidation

作　　者：陈金华[1] 韦小刚[1] 庞海丽[1] 刘博[1] 张小华[1] 旷亚非[1] 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2008年第10期51-54,共4页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50172014);新世纪优秀人才支持计划资助项目(NCET-04-0765)

摘　　要：以溶胶凝胶方法制备的SiO2修饰的碳纳米管(SiO2-CNTs)为载体材料,利用微波辅助加热化学还原方法制备了Pt-SiO2-CNTs纳米催化剂.分别利用扫描电子显微镜和能量散射谱仪对Pt-SiO2-CNTs纳米颗粒的表面形貌和元素组成进行了表征.在酸性介质中,通过循环伏安法研究了Pt-SiO2-CNTs纳米催化剂对乙醇氧化的电催化性能.与商用催化剂PtRu/C(E-TEK)相比,在相同的催化剂载量和实验条件下,Pt-SiO2-CNTs催化剂比PtRu/C(E-TEK)催化剂对乙醇氧化具有更好的催化活性和抗CO中毒能力.SiO2 modified carbon nanotubes were prepared through sot-gel method and used as the catalyst support. The Pt-SiO2 -CNTs nanocatalyst was synthesized in microwave-assisted chemical reduction method. The micrography and elemental composition of Pt-SiO2-CNTs nanoparticles were characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. The electrocatalytie properties of Pt -SiO2-GNTs nanocatalysts for ethanol oxidation were investigated with cyclic voltammetry in acidic solution. Under the same catalyst loading mass and experimental conditions, Pt-SiO2 --CNTs nanocatalysts have shown higher electroeatalytie activity than PtRu/C （E-TEK） catalyst. In addition, Pt-SiO2-CNTs nanocatalysts pos- sess good anti-poisoning ability.

关 键 词：乙醇 电催化 Pt-SiO2-CNTs纳米催化剂 燃料电池 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]