Electrochemical Behaviours and Electrocatalytic Properties of the PW12O403- (Collagen-PW12O403-)n /Cysteamine Modified Gold Electrode

Abstract

A novel multilayer of the type I collagen and PW₁₂O₄₀^3- was successfully constructed on cysteamine modified gold electrode. Electrochemistry and atomic force microscopy (AFM) were used to characterize the PW₁₂O₄₀^3- (collagen-PW₁₂O₄₀^3-)_n multilayer modified gold electrode. Atomic force microscopy images showed that the PW₁₂O₄₀^3- preferentially deposited on the collagen network to produce the three-dimensional PW₁₂O₄₀^3- network. Electrochemical results indicated that the modified electrode exhibited good electrochemical behaviours and electrocatalytic activity towards the reduction of NO₂^–. The electrochemical behaviours and electrocatalytic properties of the modified electrode were investigated in detail.