▎ 摘　　要

Graphene oxide (GO) was prepared from purified natural graphite via the modified Hummers method, and hydrazine hydrate reduced graphene oxide supported nickel catalysts were prepared via impregnation method. The influence of different supports of Ni.based catalysts for the carbon dioxide methanation reac. tion was investigated. Using reduced graphene oxide(RGO), carbon nanotubes(CNTs) and activated carbon (AC) as supports, nickel catalysts with different morphologies were formed. The prepared samples were char. acterized by FTIR, BET, H-2-TPR, XRD and TEM techniques and applied in carbon dioxide methanation. The results reveal that Ni/RGO has a relative large specific surface area(316 m(2)/g). The particle size of nickel on Ni/RGO(5.3 nm) is smaller than that on Ni/CNTs(8. 9 nm) and Ni/AC(11.6 nm). Ni/RGO shows better catalytic activity and selectivity of carbon dioxide methanation reaction than that on Ni/CNTs and Ni/AC. Ni/RGO catalyst has a remarkable stability.