络合还原法制备的Pd/C催化剂对甲酸氧化的电催化性能

Electrocatalytic performance of carbon supported Pd catalyst prepared via complex reduction progress for formic acid oxidation

摘要:

分别以硼氢化钠和乙二醇为还原剂，经络合还原法制备了炭载钯（Pd/C）催化剂。透射电镜（TEM）和X射线粉末衍射谱（XRD）结果表明，以乙二醇为还原剂制备的Pd/C催化剂中Pd粒子具有较小的粒径、均匀的粒径分布和较大的相对结晶度，Pd粒子的平均粒径和相对结晶度分别为4.2±2 nm和1.88。电化学测试结果显示，以乙二醇为还原剂制备的Pd/C催化剂具有较大的电化学活性面积，对甲酸氧化表现出较高的电催化活性和稳定性。

Abstract:

The carbon supported Pd (Pd/C) catalyst was prepared with complex reduction method by sodium borohydride and ethylene glycol, respectively. The transmission electron microscopy (TEM) and X-ray diffraction (XRD) spectrum characterizations indicate that Pd nanoparticles of the Pd/C catalyst prepared by ethylene glycol have a smaller particle size, uniform particle size distribution and higher relative crystalinity. The average size and relative crystalinity of the Pd nanoparticles are as small as 4.2±2 nm and 1.88, respectively. The electrochemical measurements demonstrate that the electrocatalytic activity and stability of the Pd/C catalyst prepared by ethylene glycol for formic acid oxidation are better than that of the Pd/C catalyst prepared by sodium borohydride.