Direct Synthesis of H2O2 from H2 and O2 over Gold, Palladium, and Gold-Palladium Catalysts Supported on Acid-Pretreated TiO2

摘要

Hydrogen peroxide is a major commodity chemical produced currently by using an indirect process. A direct process (Scheme 1, path a) would be preferred and palladium cata-lysts have demonstrated catalytic activity for such a process; recently we have shown that the addition of gold to palladium improves the catalyst performance. The major problem associated with the direct synthesis of H2O2 is the decomposition (Scheme 1, path d) or hydrogenation (Scheme 1, path c) of H2O2 by the catalysts used for its formation.