抄録
Cyclic voltammetric studies of Keggin- and Dawson-type polyoxometalate complexesare reviewed. The voltammetric behavior depends on the solution conditions including the nature of the solvent, the acidity and so on. Both types of polyoxometalates undergo multistep reversible one-electron reductions in neutral media where no protonation accompanies the reduction process. In acidified media, the one-electron waves are converted into two-electron waves, and the transformation behavior is accounted for in terms of the protonation of the reduced form at the electrode surface. Catalytic effects induced by the reduced form of the polyoxometalates are also summarized.
