咪唑四氟硼酸盐离子液体中磷钼酸掺杂聚吡咯薄膜修饰电极的制备及其电催化活性

以1-丁基-3-甲基咪唑四氟硼酸盐(BMIMBF4)离子液体作为介质,利用电化学方法在铂电极表面制备了磷钼酸掺杂聚吡咯薄膜;采用扫描电子显微镜观察了所制备的薄膜的形貌,利用热重分析评价了其热稳定性,利用循环伏安法测定了其电化学活性和对甲醇的电催化氧化活性.结果表明,与传统的硫酸溶液相比,以BMI-MBF4离子液体作为反应介质制备的修饰电极的表面形貌更均匀,电化学活性和对甲醇的电催化氧化活性更强.

Preparation of phosphomolybdate-doped polypyrrole film modified electrode in an imidazole fluoroborate ionic liquid and evaluation of its electrocatalytic activity

Polypyrrole film doped with phosphomolybdate （PM012） was prepared on the surface of Pt electrode by an electrochemical process with 1-butyl-3-methyl imidazole tetrafluoroborate （BMIMF4） ionic liquid as the medium. The surface morphology of as-prepared polypyrrole film was observed with a scanning electron microscope, and its thermal stability was evaluated based on thermogravimetric analysis. Moreover, the electrochemical activity of as-prepared polypyrrole film and its electrocatalytic activity towards methanol oxidation were evaluated by cyclic voltammetry. Results show that the modified electrode of polypyrrole film obtained in BMIMBF4 ionic liquid has a more uniform surface as well as better electrochemical activity and electrocatalytic activity for methanol oxidation than the one obtained in conventional sulfuric acid solution.