磷钼酸对直接甲醇燃料电池阴极氧还原的促进作用  

Promotion Effect of Molybdophorsphoric Acid on Oxygen Reduction for Cathode of DMFC

作　　者：苏怡[1] 刘长鹏[1] 单义斌[1] 李旭光[1] 薛新忠[1] 徐维林[1] 田天[1] 周小春[1] 邢巍[1] 陆天虹[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《高等学校化学学报》2005年第6期1114-1117,共4页Chemical Journal of Chinese Universities

基　　金：国家"八六三"计划(批准号:2001AA323060;2003AA517062);国家"九七三"计划(批准号:G2000026408);国家自然科学基金(批准号:20373068)资助

摘　　要：以磷钼酸(H4PMo12O40·xH2O,PMo12)为直接甲醇燃料电池(DMFC)阴极添加剂,制备了Pt-PMo12/C复合催化剂.电化学测试表明,该添加剂对于DMFC阴极氧还原具有明显的促进作用,与常规的Pt/C催化剂相比,相同载量下极限扩散电流提高了56.3%.在单电池性能测试中,这种促进作用使电池的最大输出功率提高了28%.One kind of heteropolyacids(H_4PMo_(12)O_(40)·xH_2O)is introduced into the cathodic electro-catalyst of direct methanol fuel cell(DMFC) as an additive. The electrochemical result shows that these modified electrodes display an excellent eletrocatalytic activity for oxygen reduction reaction. Using the catalyst modified by PMo_(12) the catalysis activity for the oxygen reduction reaction can be improved by a factor of 56.3% compared with Pt/C catalyst with the same platinum loading. This effect is also elucidated in the performance of single cell for DMFC. The peak value of power density is 28% higher than DMFC with a conventional electrode. These are may be due to the specific Keggin structure of the PMo_(12). A better stability is obtained when the PMo_(12) is introduced into the electrode.

关 键 词：磷钼酸 直接甲醇燃料电池 阴极 

分 类 号：O646[理学—物理化学]