Rh/Co双金属纳米颗粒的制备及其催化制氢性能

Preparation of Rh/Co Bimetallic Nanoparticles and Their Catalytic Activities for Hydrogen Generation

以ISOBAM-104为保护剂,采用共还原法制备了一系列不同组成的Rh/Co双金属纳米颗粒(BNPs)。采用紫外-可见吸收光谱、透射电镜及高分辨透射电镜对纳米颗粒的结构及组成进行了表征。结果表明,所制备的Rh/Co BNPs的粒径小于6.0nm,具有合金结构。催化制氢实验结果表明,Rh_(20)Co_(80)BNPs具有最高的催化制氢活性,其TOF值可高达12880mol-H_2·h^(-1)·mol-Rh^(-1),远高于Rh和Co单金属纳米颗粒的催化活性。

A series of Rh/Co bimetallic nanoparticles（BNPs） were synthesized by co-reduction method using ISOBAM-104 as protective reagent.UV-Vis,TEM and HRTEM were used for characterization of the structure and composition of the prepared nanoparticles.The results showed that Rh/Co BNPs are alloy structure,and the particle size of as-prepared BNPs is less than 6.0 nm.The catalytic activities of the prepared Rh/Co BNPs are higher than that of Rh or Co monometallic nanoparticles,and Rh（20）Co（80） BNPs possesses the highest TOF of 12880 mol-H2·h（-1）·mol-Rh（-1）.