聚吡咯碳载PdAu催化剂对甲酸的电催化氧化

摘要

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.