The Role of Water in Hydrogen Insertion into WO3
Abstract The accelerating role of water in the insertion of hydrogen into tungsten trioxide WO 3 was studied in non-aqueous aprotic and/or protic reaction media and in aqueous solutions of the sulfuric acid. The activation energies of hydrogen insertion in various reaction media were estimated. The partial molar heat of hydrogen insertion ΔH =8.7±1.2 kJ ⧸ mole of H 0.45 WO 3 was evaluated.