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 microwavesynthesis to improve the catalytic performance of Ptbased catalysts towards methanol xidation. Effects of reaction and sonicating time on the crystal structure, micromorphology and electrocatalytic 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 micromorphology of Pt2Mo/C is determined by oth the reaction and sonicating time. The influencing sequences of reaction and sonicating time on electrocatalytic 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 electrooxidation are 10min of reaction time and 60min of sonicating time.
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