One-pot synthesis of Pd nanoparticle catalysts supported on N-doped carbon and application in the domino carbonylation

Article abstract of DOI:10.1021/cs400077r

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_xNi_y) nanoparticle catalysts (Ni@CN⁸⁰⁰, Pd_xNi _y@CN⁸⁰⁰). The treatment temperature played an important role on the growth and properties of the resultant M@CN^T, wherein M@CN⁸⁰⁰ 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@CN⁸⁰⁰ 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 PdCl₂(PPh ₃)₂ within six runs.