微波合成Pt/WC催化剂及其对甲醇的电催化性能  

Microwave Heated Synthesis of Pt/WC and Its Electrocatalytic Activity for Methanol Electrooxidation

作　　者：施梅勤[1] 郎小玲[1] 马淳安[1] 褚有群[1] 陈赵扬[1] 俞彬[1] 

机构地区：[1]浙江工业大学化学工程与材料学院绿色化学合成技术国家重点实验室培育基地科技部能源材料及应用国际科技合作基地,杭州310032

出　　处：《化学学报》2011年第9期1029-1034,共6页Acta Chimica Sinica

基　　金：国际科技合作计划(No.2010DFB63680);浙江省重大科技专项国际合作(No.2008C14040);浙江省自然科学基金重点(No.Z4100790);浙江省教育厅科研项目(No.Y200908436)资助项目

摘　　要：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.Abstract Two types of Pt/WC catalysts were prepared by microwave-assisted （MW） polyol method and impregnation-reduction （IR） method. These catalysts were denoted as MW-Pt/WC and IR-Pt/WC respec- tively. The as prepared catalysts were characterized by using the techniques of XRD and SEM. The cyclic voltammogram （CV） of the methanol oxidation showed that MW-Pt/WC catalyst has the better performance than the IR-Pt/WC catalyst for methanol oxidation in terms of the onset potential and peak current. The chronoamperometry results demonstrated that the MW-Pt/WC yielded higher electrocatalytic activity com- paring with IR-Pt/WC catalyst.

关 键 词：微波合成 碳化钨 甲醇氧化 计时电流法 

分 类 号：TQ426[化学工程]