微波合成条件对催化剂Pt_2Mo/C的结构和甲醇氧化催化性能的影响  

Effects of Microwave-synthesizing Parameters on Structure and Electro-catalytic Activity of Pt_2Mo/C towards Methanol Oxidation

作　　者：曾鑫[1] 原鲜霞[1] 夏晓芸[1] 杜娟[1] 张慧娟[1] 马紫峰[1] 

机构地区：[1]上海交通大学化学工程系,上海200240

出　　处：《无机材料学报》2010年第4期359-364,共6页Journal of Inorganic Materials

基　　金：国家重点基础研究发展计划(2007CB209700);国家自然科学基金(20776085)

摘　　要：为了改善Pt/C催化剂的甲醇氧化催化性能,采用快速高效的微波加热技术合成了Mo修饰的Pt基催化剂Pt2Mo/C,并对比研究了微波反应时间和超声分散时间等条件对Pt2Mo/C的晶体结构、微观形貌和甲醇氧化催化性能的影响.结果表明:Pt2Mo/C的晶体结构主要是由微波反应时间决定的,超声分散时间对其几乎没有影响;Pt2Mo/C的微观形貌受微波反应时间和超声分散时间的共同影响.在本实验的研究范围内,微波反应时间和超声分散时间对催化剂Pt2Mo/C的甲醇氧化催化性能的影响顺序分别为10min>15min>20min>5min和60min>100min>30min>0min;制备高活性甲醇氧化催化剂Pt2Mo/C的最佳条件为微波反应10min和超声分散60min.Pt2Mo/C was prepared by microwave-synthesis to improve the catalytic performance of Pt-based catalysts towards methanol oxidation.Effects of reaction and sonicating time on the crystal structure,micro-morphology and electro-catalytic activity of Pt2Mo/C were systematically investigated.The results show that the crystal structure of Pt2Mo/C is mainly determined by the reaction time while the sonicating time has little influence on it.The micro-morphology of Pt2Mo/C is determined by both the reaction and sonicating time.The influencing sequences of reaction and sonicating time on electro-catalytic activity of Pt2Mo/C are 10min15min20min 5min and 60min100min30min0min,respectively.The optimized parameters of preparing Pt2Mo/C owing best catalytic activity towards methanol electro-oxidation are 10min of reaction time and 60min of sonicating time.

关 键 词：微波合成条件 Pt2Mo/C催化剂 甲醇氧化 

分 类 号：TM911[电气工程—电力电子与电力传动] TQ032[化学工程]