Au-Pd/石墨烯和Au-Pd/碳纳米管催化电化学氧化甲酸（英文）

Effect of graphene and carbon nanotubes supported Au-Pd nanoparticles for electrocatalytic oxidation of formic acid

利用化学还原法合成了石墨烯和碳纳米管负载的Au-Pd纳米粒子.石墨烯负载的Au-Pd纳米粒子(AuPd/G)的粒径远小于碳纳米管负载的Au-Pd纳米粒子(Au-Pd/CNTs)的粒径,且Au-Pd纳米粒子在复合材料上分布均匀.与碳纳米管负载的Au-Pd纳米粒子催化剂相比,石墨烯负载的Au-Pd催化剂对甲酸的催化显示出更好的电催化活性,结果表明作为Au-Pd纳米粒子的基底,石墨烯可以明显提高Au-Pd纳米粒子的电催化活性.在0.1mol/L H_2SO_4中,该纳米修饰电极对甲酸有良好的电催化作用,甲酸在电极上的氧化动力学过程为扩散控制过程.

Graphene and carbon nanotubes supported Au-Pd nanoparticles are synthesized by a chemical reduction method.The particle size of graphene supported Au-Pd nanoparticles（AuPd/G）is much smaller than that of carbon nanotubes supported Au-Pd nanoparticles（Au-Pd/CNTs）.There is a relatively high degree of nanoparticles dispersion on Au-Pd/G.The Au-Pd/G catalyst shows a higher electrocatalytic activity for the formic acid electrooxidation compared to the Au-Pd/CNTs catalyst indicating the substrate graphene can obviously enhance the catalytic activity of Au-Pd nanoparticles.In 0.1mol/L H2SO4 solution,the modified electrode exhibited good electrocatalytic activity on the oxidation of formic acid,and the electrode reaction of formic acid was a diffusion control process.