▎ 摘　　要

Emerging as a promising hydrogen carrier, hydrous hydrazine has attracted great attention in hydrogen storage and transportation. Herein, by using a wet-chemical reduction method, ultrafine bimetallic PtNi nanoparticles (NPs) with an average size of 1.8 nm are immobilized on a metal-organic framework templated zirconia/porous carbon/reduced graphene oxide (ZrO2/C/rGO) support. Monometallic Pt and Ni NPs show no activities for the catalytic dehydrogenation of hydrous hydrazine. Surprisingly, the obtained bimetallic Pt-Ni NPs exhibits a significantly enhanced catalytic activity toward the hydrogen generation from hydrous hydrazine, with which an extremely high turnover frequency value can be afforded to 1920 h(-1) at 323 K. The highly enhanced catalytic activity can be attributed to the small size effect, the strong synergistic effect between Pt and Ni atoms as well as the strong metal-support interactions. The present work provides a new insight to developing high-performance bimetallic catalysts for advanced catalytic and energy technologies.