论文部分内容阅读
分别采用微波加热乙二醇还原法(MW)和浸渍还原法(IR)制备以碳化钨(WC)为载体的Pt/WC催化剂,并分别标记为:MW-Pt/WC及IR-Pt/WC.用XRD、SEM对两种方法制备的复合材料的结构与形貌进行表征.循环伏安测试结果表明MW-Pt/WC催化剂在酸性条件下的甲醇氧化性能比IR-Pt/WC催化剂更优,表现在同一电位下MW-Pt/WC催化剂具有更高的电流且其氧化起始电位负移约30 mV,还具有更大的电化学比表面积.此外计时电流法实验结果表明MW-Pt/WC催化剂的稳定性高于IR-Pt/WC催化剂.
MW / Pt / WC and Pt / WC catalysts supported on tungsten carbide (WC) were prepared by microwave heating ethylene glycol reduction (MW) and impregnation reduction (IR) The structure and morphology of the composites prepared by the two methods were characterized by XRD and SEM.The cyclic voltammetry results showed that the methanol oxidation performance of MW-Pt / WC catalyst under acidic conditions was better than that of IR-Pt / WC catalyst , Which shows that the MW-Pt / WC catalyst has the higher current at the same potential and its oxidation initiation potential is negatively shifted by about 30 mV and has a larger electrochemical specific surface area. In addition, chronoamperometry results show that MW-Pt / The WC catalyst is more stable than the IR-Pt / WC catalyst.