二甲醚在Pt系催化剂上的电氧化行为初探  

Electrooxidation of Dimethyl Ether on Pt and Pt Alloy Catalysts

作　　者：赵静[1] 尹鸽平[1] 邵玉艳[1] 高云智[1] 

机构地区：[1]哈尔滨工业大学应用化学系,黑龙江哈尔滨150001

出　　处：《高校化学工程学报》2005年第4期493-497,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：本实验用化学浸渍-还原法,甲醛为还原剂制备直接二甲醚燃料电池阳极催化剂。用循环伏安法和稳态极化法,采用粉末微电极技术,研究二甲醚在自制Pt/C、PtSn/C和PtRu/C催化剂上的氧化行为。研究结果显示,二甲醚在PtRu/C上有较佳的反应活性。在PtRu/C催化剂上考察温度对于二甲醚电氧化的催化活性的影响,得出温度的升高有利于二甲醚电氧化的进行。Anode electrocatalysts Pt/C, PtSn/C (Pt:Sn=3:2) and PtRu/C (Pt:Ru=1:1) for direct dimethyl ether fuel cell (DDFC) were prepared by chemical impregnating-reduction method with formaldehyde as the reductant. Using the prepared electrocatalysts powder to form the powder filled micro-cavity anode electrodes, the electrocatalysts were investigated by cyclic voltammetry (CV) and quasi-steady state polarization. The preliminary conclusion is drawn that among the three prepared electrocatalysts, Pt alloy catalysts, especially PtRu/C, shows the highest performance for dimethyl ether electrooxidation, as in the case of methanol electrooxidation. Effect of temperature on PtRu/C catalytic activity for dimethyl ether oxidation was also investigated. It shows that increase in temperature favors the electrooxidation and adsorption of dimethyl ether, which implicates that adsorption of dimethyl ether is an endothermic process.

关 键 词：直接二甲醚燃料电池 电氧化 Pt系催化剂 粉末微电极 

分 类 号：TM911.4[电气工程—电力电子与电力传动]