聚吡咯碳载PdAu催化剂对甲酸的电催化氧化

Electrooxidation of formic acid on polypyrrole-carbon black supported PdAu catslysts

通过低温氧化法制备了聚吡咯碳(PPyC),并以PPyC为载体制备了纳米Pd催化剂(Pd/PPyC)及PdAu催化剂(PdAu/PPyC),研究发现不同比例的Pd∶Au催化剂PdAu/PPyC对甲酸的甲催化活性不同。通过计算发现,催化剂的电化学比表面积催化剂中加入少量Au能够提高催化剂中活性粒子Pd的分散度,其中Pd∶Au为4∶1时电化学比表面最大,且对甲酸有最高的电催化氧化活性。

Polypyrrole composite（PPyC） encompassed of carbon black were synthesized by low temperature oxidation of pyrrole on carbon black and the nano-Pd and nano-PdAu catalysts supported by PPyC were prepared.The results showed that the Pd/PPyC and the PdAu/PPyC catalysts of different Pd∶Au ratios exhibit different activity for formic acid oxidation.Adding a small amount of Au is possible to improve the degree of dispersion of Pd by analyzing electrochemical surface area.When Pd∶Au comes to 4∶1 we＇ll have the biggest electrochemical surface area,the highest electro-catalytic oxidation activity for formic acid electrooxidation.