The direct synthesis of hydrogen peroxide is investigated using ruthenium containing catalysts. Ruthenium is not soluble in Au but forms alloys with palladium. We have therefore investigated Ru–Au, Ru–Pd as well as trimetallic formulations supported on titania. The addition of ruthenium enhances the direct synthesis activity for all the catalysts studied and the effect is dependent on the amount of ruthenium added. The calcination conditions are shown to affect both activity and reusability.