PdSn/Fe3O4-C催化剂的制备及其对乙醇氧化的电催化性能

摘要

采用包覆法制得不同Fe3O4含量的载体Fe3O4-C(1),以PdCl2和SnCl2·2H2O为金属前驱体,采用化学还原法制得催化剂(PdSn/1),其结构和性能经TEM,XRD和EDS表征.采用循环伏安法(CV)、计时电流法(CA)和交流阻抗(EIS)技术研究了PdSn/1在碱性条件下对乙醇氧化的电催化性能.结果表明:PdSn/1(5％)表现出较高的电催化活性,乙醇氧化的峰电流密度达到147 mA·cm-2;相比于Pd/C,PdSn/1(5％)对乙醇氧化反应的电荷转移阻力也有大幅度下降.%Fe3O4-C (1) with different quantities of Fe3O4 were prepared by coating method.The nano-catalysts(PdSn/1) were prepared by reduction method,using PdCl2 and SnCl2 · 2H2O as metal precursor.The structures and properties were characterized by TEM,XRD and EDS.The electroactivity of PdSn/1 for ethanol oxidation in alkaline media were studied by cyclic voltammetry (CV),chronoamperometry(CA) and electrochemical impedance spectra (EIS).The results showed that PdSn/1(5 ％) showed the highest catalytic activity for ethanol oxidation wuth the ethanol oxidation peak current density of 147 mA · cm-2.Compared with Pd/C,PdSn/1 (5％) presents the much lower charge transfer resistance for ethanol oxidation reaction.