Fabrication and Properties of a Nanocomposite Multilayer Film Based on a Polyoxometalate

Abstract

A nanocomposite multilayer film based on a polyoxometalate Na16[P4W30Mn4 (H2O)2O112]·xH2O (Mn4P4W30) 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 IO3 -.