铂微粒修饰碳纳米管-纳米TiO_2/聚苯胺复合膜电极的制备及其电化学性能

Preparation and Electrochemical Behavior of CNT-nano TiO_2/PANI Complex Film Electrode Modified with Pt Microparticles

采用循环伏安法,在200 mmol.L-1苯胺与500 mmol.L-1H2SO4的混合溶液中,在-0.1 V^0.9 V扫描(50 mV.s-1),实现了苯胺在碳纳米管-纳米TiO2膜电极上的电化学聚合,得到翠绿色的聚苯胺膜(PANI),并用交流阻抗谱对PANI的电化学性质进行了表征。在PANI电极上修饰铂,制得铂微粒修饰PANI电极(PANI-Pt)。研究发现PANI-Pt对抗坏血酸的氧化有很高的催化活性。

Polyaniline film （PANI） was prepared by electrochemical polymerization of aniline on CNT-nano TiO2 film electrode in 500 mmol· L^-1 sulfuric acid and 200 mmol·L^-1 aniline solution with scanning voltage -0.1 V～0.9 V at 50 mV·s^-1. PANI were characterized by nyquist. Electrode modified with Pt microparticles（PANI-Pt） was prepared by electrodepositing Pt on PANI electrode. The results showed that PANI-Pt exhibited catalytic activity for electrocatalytic oxidation of ascorbic acid.