Pt-MnO_2/C的制备及对乙醇电催化活性的研究

Study on synthesis of Pt-MnO_2/C and their electrocatalytic properties for ethanol oxidation

采用水热法制备了MnO2纳米棒,然后电沉积Pt合成了Pt-MnO2/C复合物。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对MnO2的晶型和形貌进行了表征,并运用循环伏安(CV)法考察了Pt-MnO2/C在不同条件下对乙醇的电催化活性。实验结果表明,该催化剂在乙醇浓度为0.5mol/L,H2SO4浓度为0.5mol/L,电沉积Pt40段时对乙醇的电催化活性最好。

MnO2 nanorod was prepared by a hydrothermal method, and then Pt was electrodesposited to synthesise Pt-MnO2/JC composite catalyst. The crystal and morphology of MnO2 were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）, respectively. The electrochemical activity of Pt-MnO2/C for ethanol oxidation was investigated under different conditions by cyclic voltammetry （CV） method. The results show that the best catalytic activity of composite catalyst for ethanol electrooxidation is obtained when ethanol concentration is 0.5 mol/L, sulfuric acid concentration is 0.5 mol/L and the scanning segments of electrodesposition of Pt is 40.