Direct synthesis of hydrogen peroxide on palladium catalyst supported on sulfonic acid-functionalized silica

The direct synthesis of H2O2 has been successfully achieved at high-concentration and high selectivity on Pd–loaded sulfonic acid-functionalized silica using non acidic solutions and reaction temperature of 313 K.The authors acknowledge financial support from Repsol-YPF (Spain) and the Spanish Ministry of Science and Innovation under projects PSE-310200-2006-2 and FIT-320100-2006-88. GBB acknowledges a fellowship granted by Repsol-YPF.Peer reviewe