Topotactic redox reactions of the channel type chalcogenides Mo 3S 4 and Mo 3Se 4

Abstract

Mo 3S 4 and Mo 3Se 4 were found to undergo topotactic electron-ion exchange reactions at ambient temperatures in aqueous and non-aqueous electrolytes containing transition or main group cations. The products of cathodic reduction are ternary phases A xMo 3X 4. Mobilities of the exchangeable cations are rather high inside the solid and are responsible for high reaction rates. Cathodic reduction of Mo 3S 4 and Mo 3Se 4 represents a suitable method for the preparation of both stoichiometric and nonstoichiometric ternary phases which are of interest with respect to the superconducting properties of these chalcogenides.