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Via layer-by-layer assembly, the polyoxometalates of Keggin type, SiW_ 11O_ 39Ni(H_2O) 6-(SiNiW_ 11) and {SiW_ 11O_ 39Mn(H_2O) 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.
Via layer-by-layer assembly, the polyoxometalates of Keggin type, SiW_11O_39Ni (H_2O) 6- (SiNiW_11) and {SiW_11O_39Mn (H_2O) 6_} (SiMnW_11) were first immobilized on a 4-aminothiophenol The electrochemical behavior of these polyoxometalates was investigated. The galvanization behavior of these polyoxometalates was investigated. They exhibit some characteristic properties in the films, which are different from those in a homogeneous aqueous solution. Their reactions are in a multilayer film is proposed. Electrocatalytic behavior of these multilayer film electrodes for the reduction of BrO-_3 and NO-_2 were comparatively studied.