Abstract
H4SiW12O40 (abbreviated as SiW) and Pt supported on carbon graphite (CG) with different Pt/SiW ratios were prepared and characterized by FTIR, XRD, ICP-OES, polarography, and TEM. The prepared catalysts were then after successfully attached onto glassy carbon electrodes by using polyvinylidene difluoride (PVDF) as binder. The resulting electrocatalysts were characterized by cyclic voltammetry (CV) and tested for the electrooxidation of cyclohexane. It has been found that the addition of SiW to the catalyst increased the dispersion of the Pt particles. The results of the electrocatalytic tests showed that cyclohexanone, cyclohexanol, and cyclohexyl hydroperoxide are formed as major products of the reaction. Higher Pt loadings promoted cyclohexanone production.