【摘要】 采用化学还原法制备了PtRu/C催化剂,XRD的表征分析结果表明:Pt粒子呈面心立方结构,催化剂平均粒径为4nm。并使用循环伏安法研究了PtRu/C催化剂(担载量0.056mg/cm2,PtRu的质量分数为20%,Pt/Ru原子比为1∶1)的电氧化性能。研究结果显示制备的催化剂对甲醇有高的电催化氧化性能:起始电位为0.2V(vs.SCE),其峰值电流密度为23.52mA/cm2,比质量活性为419mA/mg。研究还发现利用本方法制备的PtRu/C催化剂对于甲醇有较强的抗CO中毒能力和较高的电催化活性。更多还原

【Abstract】 The PtRu/C catalyst was prepared by chemical reduction method in this paper. The XRD analyzing results show that the catalyst is of a face- centered cubic crystal lattice structure with the average particle size of 4 nm. Catalytic activities of the prepared PtRu/C were studied by cyclic voltammetry in a solution of 0.5 mol/L CH3OH + 0.5 mol/L H2SO4. The results show that the start potential is 0.2 V (vs. SCE), the oxidation peak current is 23.52 mA/cm2, and the ratio of the oxidation peak current to the loading is 419 mA/mg. The study also shows that the prepared catalyst not only has a higher catalytic activity to methanol, but also has good tolerance to CO.更多还原