Issue: 3-4 , Volume: 21 , Уear of publication: 1993

Gas phase reactions of Mo⁺ and W⁺ ions with the molecules of various oxidants (NO, 0₂, N₂0, CH₂0, C₂H₄0) were studied using ion cyclotron resonance. In oxidation with N₂0 the mono-, di- and trioxide metal cations are formed consecutively. The trioxide MO~- ions of both metals react with CO to form CO₂ and MO + ions. In this way, catalytic reaction N₂0 + CO N₂ + CO₂ occurs in the gas phase with MoO +/MoO + and WO +/WO + couples as catalysts. The rate constants have been measured for both stages of the catalytic cycle as well as for the stages of the catalyst preparation. Metal-oxygen bond energies were estimated for MoO + and WO + species with various x. The mechanism of CO oxidation with MoO + and WO + cations as catalysts in the gas phase is discussed in comparison with that for the oxidation over classical solid oxide catalysts.