甲醇在有序化氰桥混配物修饰铂电极上的电催化氧化

摘要

An ordered cyanide-bridged mixed complexes modified platinum electrode is prepared by lyotropic liquid crystal soft template methods in which lecithin-AOT-TritonX-100 system is accepted. Scanning electron microscopy (SEM) is employed to characterize morphology of the modified film. The electrocatalytic oxidation behavior of methanol on the modified electrode is studied by means of cyclic voltammetry and chronoamperometry. The highly ordered cyanide-bridged mixed complexes film can be obtained by the removal manner of soft template with producing hydrogen bubble. Moreover, the oxidation peak current density of methanol has increased about 50% more than that on the disordered modified platinum electrode. The novel ordered cyanide-bridged mixed complexes film possesses much better and steady cooperative catalytic action to electro-oxidation process of methanol.%用卵磷脂-AOT-曲通X-100体系溶致液晶软模板制备了有序化氰桥混配物膜修饰的铂电极.通过SEM表征了修饰电极的表面形貌,采用循环伏安和计时电流法研究了甲醇在该修饰电极上的电催化氧化行为.结果表明,用氢气泡脱除软模板法可使修饰的氰桥混配物高度有序化；在此修饰电极上,甲醇的电催化氧化峰电流密度与未有序化同类物修饰的铂电极相比增加了约50％,且对甲醇的电催化氧化过程具有更好、更稳定的协同催化作用.