碳载铂纳米微粒修饰的玻碳电极对甲醇的电催化氧化

Electrocatalytic Oxidation of Methanol on the Glassy Carbon Electrode Modified with Carbon Supported Pt Nanoparticles

摘要:

利用X射线粉末衍射、透射电镜和扫描电镜对商用Pt/C催化剂反应前后的变化进行了物化表征，同时应用电化学方法研究了甲醇在碳载铂纳米微粒修饰的玻碳电极上的电催化氧化性能。结果表明，修饰电极对甲醇氧化呈现较高的电催化活性。铂氧化物的电化学还原在Pt/c催化剂中受到了抑制，该现象可能是由于Pt与载体碳间的强烈作用所引起的。通过扫描电镜和循环伏安研究表明，该催化剂对甲醇的氧化可能存在着表面结构敏感效应。

Abstract:

Physico-chemical characterization of commercially available Pt/C catalysts before and after methanol oxidation experiments was carried out by X-ray diffraction, scanning electron microscope and transmission electron microscopy. Meanwhile, the electrocatalytic performance of the glassy carbon electrode modified with the carbon supported Pt nanoparticles for the oxidation of methanol has been studied by means of electrochemical method. The experimental results showed that the Pt/C/GC electrode had high electrocatalytic activity for the electrocatalytic oxidation of methanol. The electrochemical reduction of the Pt oxide is inhibited owing to the strong binding of Pt to the support in the Pt/C catalyst. By means of SEM and cyclic voltammetric studies, it was shown that a surface structure-sensitive effect might exist during electrooxidation of methanol on Pt/C catalyst.