▎ 摘　　要

In this project, in the first step, the graphene oxide-metformin-nickel catalyst has been prepared and then the Ni(II) was reduced to Ni(0) by hydrazine hydrate and Ni(0) nanoparticle coordinated to metformin-GO was achieved. After full characterization of catalyst structure by different analyses like fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-Ray analysis (EDX), X-Ray diffraction analysis (XRD), thermal gravimetric analysis (TGA), and coupled plasma/atomic emission spectroscopy (ICP), as well as confirm the successful synthesis of catalyst, the activity of catalyst has been examined in the Suzuki-Miyaura cross-coupling reaction.