Assembly and Electrochemical Study of Transition Metal Substituted Polyoxometalates SiW_(11)NiO_(39)^(6-) and SiW_(11)MnO_(39)^(6-) on 4-Aminothio-phenol Modified Glassy Carbon Electrode

摘要

Via layer-by-layer assembly, the polyoxometalates of Keggin type, SiW 11O 39Ni（H2O） 6-（SiNiW 11） and {SiW 11O 39Mn（H2O） 6-}（SiMnW 11） were first immobilized on a 4-aminothiophenol（4-ATP） modified glassy carbon electrode surface. The electrochemical behavior of these polyoxometalates was investigated. They exhibited some special properties in the films, which are different from those in a homogeneous aqueous solution. Their reaction mechanism in a multilayer film is proposed. The electrocatalytic behavior of these multilayer film electrodes for the reduction of BrO-3 and NO-2 were comparatively studied.