Pt/CNTs催化剂的微波法制备及其对甲醇电氧化的催化性能

Preparation of Pt/CNTs Through Microwave Method and Their Catalytic Performance for Methanol Electro-oxidation

为快速制备高分散Pt催化剂,首先对氯铂酸乙二醇溶液微波加热制备了Pt颗粒,然后将Pt颗粒吸附在碳纳米管(CNTs)表面,得到了Pt/CNTs系列催化剂.用X射线衍射(XRD)和透射电镜(TEM)考察了NaOH对催化剂颗粒大小和分散的影响,结果表明,NaOH有助于降低Pt颗粒尺寸和增加Pt颗粒分散稳定性,从而得到CNTs表面均匀分布的Pt催化剂.并对催化剂进行循环伏安扫描,结果表明,Pt/CNTs对甲醇电氧化活性较好.

To quickly prepare Pt catalyst with high dispersion, Pt particles are formed by micro- wave-heating H2PtCl6 ethylene glycol solution and then absorbed onto the carbon nanotubes （CNTs） surface, resulting with Pt/CNTs catalyst series. The effect of NaOH on Pt particle size and dispersion on CNTs is investigated using X-ray diffraction（XRD） and transmission electron microscopy（TEM） ,and the results show that NaOH helps to decrease Pt size and increase Pt stability of dispersion. The prepared Pt/CNTs are investigated in terms of methanol electro-oxidation catalysis using cyclic voltammetry （CV） scanning method,and the results indicate that Pt/ CNTs can exhibit high catalytic activity for methanol electro-oxidation.