聚邻苯二胺/铂复合电极的制备及其电催化研究

利用原位聚合原位还原复合法制备了聚邻苯二胺(PoPD)/铂(Pt)复合电极。通过扫描电镜(SEM)、x射线能谱(XRD)、傅立叶变换红外光谱(FTIR)、和交流阻抗(EIS)对其形貌、组成元素和结构等进行了表征。研究了Poly(O-Phenylenediamine)/Platinum电极对甲醇的电催化行为,发现该复合电极对甲醇有良好的电催化性能。与裸铂电极相比,氧化电流高出约4.5倍。通过循环伏安法和计时电量法测定了修饰电极在甲醇溶液中的动力学参数,测得电子转移数为1,扩散系数为8.5687×10-7㎝2/s。

Preparation and electrocatalytic of poly(o-phenylenediamine)/platinum electrode

The poly(o-phenylenediamine)/platinum electrode have been prepared through in-situ polymerization and reduction.Surface morphology,composition and structure of samples were characterized by scanning Electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)and Impedance analysis(EIS).The electrocatalytic oxidationof methanol have been studied on poly(o-phenylenediamine)/platinum electrod.Results showed the Pt/Popt electrode is more active than Pt electrode in the electrocataly oxidation of CH3OH,The kinetics parameters were also calculated by cyclic voltammetry(CV)and chronocoulometry.The number of electron transfer(n)was 1 and the diffusion coefficient was 8.5687×10-7㎝2/s.