Fabrication and properties of a nanocomposite multilayer film based on a polyoxometalate

摘要

A nanocomposite multilayer film based on a polyoxometalate Na _(16)[P _4W _(30)Mn _4 (H _2O) _2O _(112)].xH _2O (Mn _4P _4W _(30)) was fabricated by the layer-by-layer self-assembly method. It was characterized by UV=Vis spectra and atomic force microscopy (AFM). The electrochromic and electrocatalytic properties were explored using chronoamperometry (CA), UV=Vis spectroscopy and cyclovoltammetry (CV). The attractable feature is a color change of the film by the reduction of the polyoxometalate at different potentials. The film also exhibits good electrocatalytic activity toward the reduction of IO ~(3-).