Direct synthesis of hydrogen peroxide (DSHP) was studied over Pd loaded on HZSM-5 nanosheets (Pd/ZN). Pd nanoparticles with average size of

ca

. 4.3 nm were introduced into the adjacent nanosheet layers (thickness of ca. 2.9 nm) by impregnation method. Pd/ZN with theoretical Si/Al molar ratio of 25 showed the highest selectivity for H

2

O

2

among the prepared catalysts

together with highest formation rate of H

2

O

2

(38.0 mmol·(g cat)

-1

·h

-1

)

1.9 times than that of Pd supported on conventional HZSM-5 zeolite (Pd/CZ-50). Better catalytic performance of nanosheet catalysts was attributed to the promoted Pd dispersion which promoted H

2

dissociation

more Brønsted acid sites and stronger metal-support interaction which inhibited the dissociation of O-O bond in H

2

O

2

. The embedded structure sufficiently protected the Pd nanoparticles by space confinement which restrained the Pd leaching

leading to a better catalytic stability with 90% activity retained after 3 cycles

which was almost 3 times than that of Pd/CZ-50 (30.4% activity retained).