One-Pot Synthesis of Pd Nanoparticle Catalysts Supported on N-Doped Carbon and Application in the Domino Carbonylation

In this work, we report a novel and facile procedure for a one-pot preparation of palladium nanoparticle catalysts supported on porous N-doped carbon (Pd@CN T ) by direct carbonization of palladium- N -heterocyclic carbene coordination polymer (P-Pd-NHC). This method could be conveniently extended to the synthesis of the Ni and alloy (Pd x Ni y ) nanoparticle catalysts (Ni@CN 800, Pd x Ni y @CN 800 ). The treatment temperature played an important role on the growth and properties of the resultant M@CN T, wherein M@CN 800 carbonized at 800 °C showed well-monodispersed metal nanoparticles (MNPs), graphene-like layers of the N-doped carbon supports, and strong interaction between MNPs and the support. Pd@CN 800 displayed high efficiency and stable recyclability toward the domino carbonylative synthesis of pyrazole derivatives. Interestingly, its catalytic performance has been even higher than that of the representative PdCl 2 (PPh 3 ) 2 within six runs.