甲醇在聚苯胺载铂电极上的电催化氧化

Electrocatalytic Oxidation of Methanol on Platinum Load on Polyaniline Electrode

用循环伏安法在玻碳电极上电聚合导电高分子聚苯胺用于附载Pt,提高了Pt的分散度。发现甲醇在Pt/PAN/GC电极和Pt/GC电极上均能自发解离出强吸附中间体CO,证实聚苯胺膜的存在有利于提高电极对甲醇的电催化氧化活性,CO在Pt/PAN/GC电极上的氧化峰电流明显高于Pt/GC电极。通过比较甲醇的电催化氧化活性可知,Pt/PAN/GC电极催化氧化甲醇的峰电流为58.68mA/cm2和50.00mA/cm2,是Pt/GC电极氧化峰电流的1.6倍和1.7倍。

Polyaniline was electropolymerized onto glassy carbon electrode to load Pt as electrode by means of circlic voltammetric method. The polyaniline was found to have a significant bearing on the size of the platinum deposits. It was found that methanol could dissociate spontaneously on Pt/PAN/GC electrode as it dissociated on Pt/GC electrode, producing strong absorption intermediate CO, the results demonstrated that polyaniline could improve the electrocatalytic activity of methanol on Pt/PAN/GC electrode. The oxidation current of CO on Pt/PAN/ GC electrode was significantly higher than that of Pt/GC electrode. The electroactivation of methanol oxidized on Pt/PAN/GC electrode and Pt/GC electrode were studied by circlic vohammetry. The oxidation currents of methanol on Pt/PAN/GC electrode were 58.68 mA/cm^2 and 50.00 mA/cm^2, which were 1.6 times and 1.7 times higher than those on Pt/GC electrode.