直接甲醇燃料电池的耐甲醇阴极电催化剂炭载四羧基酞菁钴的研究

Studies on Methanol-tolerant Cathode Electrocatalysts Cobalt Tetracarboxylic Phthalocyanine Supported on Carbon Black(CoPcTc/C) in Direct Methanol Fuel Cell

比较了甲醇对 Pt/C和炭载四羧基酞菁钴 (Co Pc Tc/C)催化氧还原性能的影响 .结果表明 ,甲醇使Pt/C催化氧还原的性能严重降低 ,而对经 80 0℃热处理的 Co Pc Tc/C(Co Pc Tc/C-80 0 )基本没有影响 ;并且Co Pc Tc/C-80 0催化氧还原的性能优于经其它温度热处理的 Co Pc Tc/C,Co Pc Tc/C-80 0是一种较好的直接甲醇燃料电池的耐甲醇阴极电催化剂 .XPS结果表明 ,Co Pc Tc/C-80 0的活性位可能是含 Co N4结构的物质和零价 Co的混合物 .

The electrocatalytic performance of Pt/C and cobalt tetracarboxylic phthalocyanine supported on carbon black(CoPcTc/C) for oxygen reduction were compared. The results showed that the presence of methanol reduced seriously the electrocatalytic activities of Pt/C for the oxygen reduction, while it had no effect on that of heat-treated CoPcTc/C at 800 ℃(CoPcTc/C-800). And the electrocatalytic activity of CoPcTc/C-800 for the oxygen reduction was higher than those heat-treated at other temperatures. Therefore, CoPcTc/C-800 was a promising candidate of methanol-tolerant cathode electrocatalyst in DMFC. XPS result reveals that active site of CoPcTc/C-800 may be the composite of CoN 4 and Co 0.