低温油相合成金钯纳米粒子及其催化性能研究

采用低温油相法合成了不同金钯量比的双金属纳米催化剂,对其形貌和电催化性能进行了分析。透射电镜表征结果显示,金钯的量比对催化剂的分散性和纳米颗粒的尺寸有一定的影响。当金钯等量比时,分散性最好、纳米颗粒的粒径最小。而电化学测试表明,当金钯等量比时,高分散、小尺寸的金钯纳米催化剂更易于裸露有效活性位点,从而对甲酸和乙醇显示出较高的催化活性和稳定性。

Synthesis of Gold-Palladium Nanoparticles in Oil Phase at Low Temperature and Their Catalytic Properties

In this paper, low temperature oil phase method was used to synthesize bimetallic nanocatalysts with different molar ratios of gold and palladium and the morphology and electrocatalytic properties were characterized and analyzed. The results of transmission electron microscopy(TEM) show that the molar ratio of palladium to gold has a certain influence on the dispersibility of catalyst and the size of nanoparticles. The dispersion was the best and the particle size was the smallest when the molar ratio of gold to palladium is equal. Electrochemical tests showed that When gold and palladium is equal to the molar ratio the nano-catalysts with high dispersion and small size were more likely to expose effective active sites, resulting in higher catalytic activity and stability for formic acid and ethanol.