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A comparison between two Pd‐Ni catalysts supported on two different supports toward Suzuki‐Miyaura coupling reaction
Authors:Masoud Taheri  Mehran Ghiaci  Andrey Shchukarev
Institution:1. Department of Chemistry, Isfahan University of Technology, Isfahan, Iran;2. College of Pardis, Chemistry Section, Isfahan University of Technology, Isfahan, Iran;3. Department of Chemistry, Ume? University, Ume?, SE, Sweden
Abstract:When a single metal fails to promote an efficient Suzuki‐Miyaura coupling reaction at ambient temperature, the synergistic cooperation of two distinct metals might improve the reaction. To examine the synergistic effect of palladium and nickel for catalyzing Suzuki coupling reaction, g‐C3N4 supported metal nanoparticles of PdO, NiO and Pd‐PdO‐NiO were prepared, characterized and their catalytic activities evaluated over different aryl halides at room temperature and 78 °C. The morphological characterization of Pd‐PdO‐NiO/g‐C3N4 demonstrated that the bimetallic particles were uniformly dispersed over the g‐C3N4 layers with diameters ranging from 3.5‐7.7 nm. XPS analysis showed that nanoparticles of Pd‐PdO‐NiO consisted of Pd(II), Pd(0) and Ni(II) sites. The experiments performed on the catalytic activity of Pd‐PdO‐NiO/g‐C3N4 showed that the prepared catalyst demonstrated an efficient activity without using toxic solvents.
Keywords:graphitic carbon nitride  green chemistry  heterogeneous catalyst  Pd‐PdO‐NiO nanoparticles  Suzuki coupling reaction
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