中文摘要：

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，在相同的催化剂栽量和实验条件下，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．

英文摘要：

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.