甲醇在铂微粒修饰碳纳米管/纳米TiO_2-聚苯胺膜电极上的电催化氧化

Electrocatalytic Oxidation of Methanol on Carbon Nanotube/nanocrystalline TiO_2-Polyaniline Film Electrode Modified with Pt Microparticles

在0.5mol·L-1硫酸介质中,采用循环伏安的电化学聚合方法,以50mv·s-1的扫描速度,在-0.1～0.9V范围内以碳纳米管/纳米TiO2(CNT/nanoTiO2)电极为基体聚合得到了聚苯胺(PAn)复合膜电极,用循环伏安法研究了CNT/nanoTiO2-PAn-Pt电极在0.5mol·L-1H2SO4溶液中的电化学行为以及对甲醇氧化的电催化行为。结果表明,CNT/nanoTiO2-PAn-Pt电极对甲醇的氧化具有很高的电催化活性,并同时存在PAn的协同催化作用。在Pt载量为0.56mg/cm2时,甲醇氧化峰电流达到152mA/cm2,随着Pt载量的增加,甲醇的氧化峰电流最高可达410mA/cm2。

Polymerization of aniline on carbon nanotube/nanocrystalline TiO2 (CNT/nanoTiO2) film electrode has been achieved in 0.5mol·L-1 sulfuric acid including 0.2mol·L-1 aniline with scanning voltage -0.1V～0.9V at rate 50 mv·s-1.The electrochemical behaviour of the CNT/nano TiO2-PAn-Pt electrode in 0.5mol·L-1 H2SO4 solution and the oxidation of methanol on it were studied by cyclic voltammetry. The results indicate that CNT/nanoTiO2-PAn-Pt electrode exhibits very high electrocatalytic activity for the oxidation of...