Electrochemical Preparation of VPtCl6 Film and Its E

A modified electrode with vanadium hexachloroplatinate VPtCl6 film has been fabricated directly from the mixing of V2+ and
PtCl6
2− ions, and its electrochemical behavior was investigated. The deposition of a VPtCl6 film occurred when PtIVCl6
2− was
electrochemically reduced to PtIICl6
2− and V3+ to V2+. The electrochemical quartz crystal microbalance EQCM, ultraviolet-visible
absorption spectroscopy, stopped-flow, chronoamperometry, and cyclic voltammetry techniques were used to study the deposition
and growth mechanism of the above film. In the EQCM studies, the reversibility of the vanadium II/III hexachloroplatinate film
during cyc领 and the corresponding frequency change was found to be good, and the V2+ ion exchange obviously occurred in the
redox couple. For the surface morphological analysis, the film was further electrochemically deposited on a transparent semiconductor
indium tin oxide ITO electrode for scanning electron microscopy and atomic force microscopy studies. It was found that
the deposited VPtCl6 film formed as a film with platinum and vanadium particles on ITO. To validate the electroanalytical
properties, a VPtCl6-modified glassy carbon electrode was applied for the electrocatalytic reduction of the NAD+ -Nicotinamide
adenine dinucleotide and sulfur oxoanions, and the results showed a quite effective electrocatalytic reduction for the corresponding
substances. 扫描探针显微镜(SPM/AFM/STM)