Nickel nanoprism containing ppm level of Pd catalysis of reduction and Suzuki-Miyaura reactions

Abstract

Two types of Nickel nano-prism containing a ppm level of palladium atoms were prepared and their physical morphology and prism-like structure were identified. Catalytic investigation of these novel bimetallic nano-prisms showed that Pd on amine-modified (Ni@NH₂-Pd NPr) displayed higher efficiency than one-pot prepared NiPd NPr in reductions of nitroarenes and Suzuki–Miyaura coupling reaction in aqueous media. Using Ni@NH₂-Pd NPr with ppm levels of Pd (8 ppm), a variety of aromatic nitro compounds were reduced to amines in very short reaction times and excellent yields. Also, a synergistic effect between ppm of Pd (8 ppm) and Ni NPr was observed in the Suzuki reaction, and different aryl bromides were successfully used as starters in the Suzuki–Miyaura coupling reaction. The catalyst brings out high TON's up to 9090 with respect to Pd species, and recyclability and stability of the catalyst were proved.