The
synthesis of H2O2 generally requires
multiple mixed organic solvents and/or halide additives, causing complexity
in purification. Herein, we overcome this problem by direct synthesis
of H2O2 in aqueous solution using AuPd nanoparticles
fixed within the aluminosilicate zeolite crystals as a catalyst. The
AuPd nanoparticles catalyzed the oxygen hydrogenation to form H2O2 in zeolite crystals via a zeolite-assisted proton
transfer process. In addition, the protons also stabilize the H2O2 product against the deprotonation that causes
H2O2 decomposition. The H2O2 productivity reached 320 mmol gAuPd–1 h–1 with a H2 selectivity of 88% in
water, showing significant advances compared with the conventionally
supported metal nanoparticle catalysts. These findings highlight the
zeolite fixed structure that offers a new way for designing efficient
catalysts in H2O2 synthesis.