在Fe3+或C02+存在下进行吡咯的聚合反应,得到金属离子掺杂的聚吡咯,并在N2气氛下700℃碳化,再将该碳化产物在900℃焙烧得到含有不同金属的复合催化剂PPY-M(M为不同的金属).采用SEM、XRD等对催化剂的结构进行了表征.通过循环伏安和线性电位扫描等电化学手段,研究了催化剂对氧还原(ORR)的电催化活性及其稳定性.结果表明,掺杂金属钴的催化剂的活性最好,在酸性溶液中ORR的起始电位达到0.54 V(vs SCE),电流密度为7.5 mA/mg@-0.3 V(vs SCE);在碱性溶液中ORR的起始电位为-0.11 V(vs SCE),电流密度为5.7 mA/mg@-0.8 V.Fe或Co掺杂的聚吡咯碳化物对ORR具有较强的电催化活性,而且制备过程简单、成本低,有较重要的研究意义.
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