微波合成条件对催化剂Pt2Mo/C的结构和甲醇氧化催化性能的影响

doi:10.3724/SP.J.1077.2010.00359

无机材料学报 ›› 2010, Vol. 25 ›› Issue (4): 359-364.DOI: 10.3724/SP.J.1077.2010.00359 CSTR: 32189.14.SP.J.1077.2010.00359

微波合成条件对催化剂Pt₂Mo/C的结构和甲醇氧化催化性能的影响

曾鑫, 原鲜霞, 夏晓芸, 杜娟, 张慧娟, 马紫峰

上海交通大学化学工程系, 上海 200240

收稿日期:2009-08-26 修回日期:2009-10-23 出版日期:2010-04-20 网络出版日期:2010-04-27

Effects of Microwavesynthesizing Parameters on Structure and Electrocatalytic Activity of Pt₂Mo/C towards Methanol Oxidation

ZENG Xin, YUAN Xian-Xia, XIA Xiao-Yun, DU Juan, ZHANG Hui-Juan, MA Zi-Feng

Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2009-08-26 Revised:2009-10-23 Published:2010-04-20 Online:2010-04-27

摘要/Abstract

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.

关键词: 微波合成条件, Pt₂Mo/C催化剂, 甲醇氧化

Abstract:

Pt_2Mo/C was prepared by microwavesynthesis to improve the catalytic performance of Ptbased catalysts towards methanol xidation. 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 oth the reaction and sonicating time. The influencing sequences of reaction and sonicating time on electrocatalytic activity of Pt₂Mo/C are 10min>15min>20min >5min and 60min>100min>30min>0min, 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.

Key words: microwavesynthesizing parameters, Pt₂Mo/C catalyst, methanol oxidation

中图分类号:

TM911
TQ032

曾鑫,原鲜霞,夏晓芸,杜娟,张慧娟,马紫峰. 微波合成条件对催化剂Pt₂Mo/C的结构和甲醇氧化催化性能的影响[J]. 无机材料学报, 2010, 25(4): 359-364.

ZENG Xin,YUAN Xian-Xia,XIA Xiao-Yun,DU Juan,ZHANG Hui-Juan,MA Zi-Feng. Effects of Microwavesynthesizing Parameters on Structure and Electrocatalytic Activity of Pt₂Mo/C towards Methanol Oxidation[J]. Journal of Inorganic Materials, 2010, 25(4): 359-364.

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微波合成条件对催化剂Pt₂Mo/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 Pt₂Mo/C towards Methanol Oxidation

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