Direct synthesis of H2O2catalyzed by Pd nanoparticles encapsulated in the multi-layered polyelectrolyte nanoreactors on a charged sphereElectronic supplementary information (ESI) available: Experimental details, Table S1, Fig. S1 and S2. See DOI: 10.1039/c1cc11180a

A highly efficient and industrially viable catalyst design for the direct synthesis of H2O2from H2and O2was realized by the encapsulation of Pd nanoparticles in polyelectrolyte multi-layers on a sulfonated resin. The continuous production of 9.9 wt% H2O2was achieved under intrinsically safe and non-corrosive conditions without any loss of activity. [ABSTRACT FROM AUTHOR]