本文通过比较 0 .5mol/LK2 CO3与 0 .5mol/LH2 SO4 中甲醇阳极氧化与氧阴极还原的动力学 ,探讨直接甲醇燃料电池 (DMFC)使用碳酸盐介质的可能性 .实验表明 ,碳酸盐介质比传统的酸性介质具有更多的优点 :1)在碳酸盐介质中 ,电池的阴阳极反应性能比在酸中的高 ;2 )非贵重金属材料有可能被用作阴阳极催化剂 ;3)由于可能使用对甲醇不敏感的金属氧化物 (如MnO2 )作阴极催化剂 ,甲醇穿透隔膜于阴极放电的难题有望克服 .
The kinetics of methanol oxidation and oxygen reduction in 0.5 mol/L K 2CO 3 were compared with those in 0.5 mol/L H 2SO 4. Experiments revealed that carbonate media could be more beneficial to direct methanol fuel cell(DMFC).Firstly, both electrode reactions show better performance in the carbonate than in the acid; secondly, materials other than noble metals become possible to be used as the anodic and cathodic catalysts;thirdly, the potential dectease caused by methanol crossover could be depressed by using metal oxide catalysts not stable in acid, such as MnO 2.
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