Electrochemical Preparation, Characterization, and Electrocatalytic Properties of OsPtCl 6 Film Electrodes Towards Reduction of NAD + , Chloroacetic Acids, and Nitrous Oxide

Stable electroactive mixed films of osmium oxide/hexachloroplatinate, osmium oxide and platinum have been deposited on different electrode materials by cycling the electrode potential repetitively in solution containing Os 3+ and PtCl $\rm{ {_{6}^{2-}}}$ . The film growth of was monitored by using cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM). The cyclic voltammetric features of modified electrode in Os 3+ solution resembles that of surface wave, and involves ions‐exchange with Os 3+ ions present in the solution. Based on the SEM results the modifier was considered as one‐dimensional, mixed‐valent polymeric film, and stabilized by Os 3+/2+ counter ions. Finally, the electrocatalytic activity of the modified electrode was examined toward reduction of NAD + , chloroacetic acids and nitrous oxide.