▎ 摘　　要

The safe and efficient storage and release of hydrogen are widely recognized as the main challenges for the establishment of a fuel-cell-based hydrogen economy. Formic acid (FA) has great potential as a safe and convenient source of hydrogen for fuel cells. Despite tremendous efforts, the development of heterogeneous catalysts with high activity and relatively low cost remains a major challenge. The synthesis of AuPd-MnOx nanocomposite immobilized on ZIF-8-reduced-graphene-oxide (ZIF-8-rGO) bi-support by a wet-chemical method is reported here. Interestingly, the resultant AuPd-MnOx/ZIF-8-rGO shows excellent catalytic activity for the generation of hydrogen from FA, and the initial turnover frequency (TOF) reaches a highest value of 382.1 mol H-2 mol catalyst(-1) h(-1) without any additive at 298 K. This good performance of AuPd-MnOx/ZIF-8-rGO results from the modified electronic structure of Pd in the AuPd-MnOx/ZIF-8-rGO composite, the small size and high dispersion of the AuPd-MnOx nanocomposite, and also the strong metal-support interaction between the AuPd-MnOx and ZIF-8-rGO bi-support.