Pt-ZnO/C复合材料的合成及对醇类催化活性的研究

Synthesis of Pt-ZnO/C composites and their catalytic activity for alcohols oxidation

采用溶胶-凝胶法制备了ZnO微米颗粒,电沉积Pt合成了Pt-ZnO/C复合材料。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对产物的晶型和形貌进行了表征,并利用循环伏安法(CV)研究了所得复合材料对甲醇和乙醇的电催化活性。实验结果表明,该催化剂在ZnO的质量分数为50%时对甲醇和乙醇氧化的电催化活性最好。

ZnO micro particles were prepared by a sol-gel method.Pt-ZnO/C were obtained by electrodepositing Pt.The crystallinity,composition and morphology of the as-prepared powders were characterized by X-ray diffraction（XRD） and scanning electron microscope（SEM）.The electrocatalytic activity towards methanol and ethanol oxidation of such micro-composites on a kryptol substrate was investigated in acid electrolyte at room temperature using cyclic voltammetry（CV）.The results show that the best catalytic activity of composite catalyst for methanol and ethanol oxidation is obtained when the content of ZnO is 50%.