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采用电化学阳极氧化-阴极还原法制备Pt-TiO2纳米管电极。扫描电镜(SEM)结果显示TiO2纳米管平均管径100nm,管长470nm,管壁厚20nm,且其比表面积大,同时纳米Pt微粒分散在TiO2纳米管上,且粒径细小,Pt微粒充分裸露,使得Pt-TiO2纳米管电极活性点多,电催化性能高。对甲醇的电催化性能测试表明:同纯Pt电极和Pt-TiO2电极(Pt微粒固定在TiO2致密膜上)相比,Pt-TiO2纳米管电极对甲醇具有更高的电催化活性,其氧化峰电流密度是在纯Pt片电极上的20倍以上。
The Pt-TiO2 nanotube electrode was prepared by electrochemical anodic oxidation-cathodic reduction. Scanning electron microscopy (SEM) results showed that the average diameter of TiO2 nanotubes was 100nm, the tube length was 470nm, the wall thickness was 20nm, and the specific surface area was large. At the same time, the nano-Pt particles were dispersed on the TiO2 nanotubes. , Making Pt-TiO2 nanotubes electrode active points, high electrocatalytic performance. The results of electrocatalytic performance of methanol showed that Pt-TiO2 nanotubes have higher electrocatalytic activity than methanol on pure Pt electrode and Pt-TiO2 electrode (Pt microparticles immobilized on TiO2 dense membrane), and the oxidation peak Current density is more than 20 times that of pure Pt electrode.