Electrodeposition Process In Ionic Liquid Electrolytes And Catalytic Properties Of Nickelgallium Alloys

CO₂ is one of the air pollutants, but also the cheapest source of carbon, which has transformed the use of great practical value, therefore recycling cured CO₂ become one of the best ways to solve the industrial carbon-based energy recycling. In this paper, in ionic liquids electrodeposition research Ni-Ga alloy catalyst was prepared by electrochemical methods smaller crystal size, better catalytic properties of the catalyst, the Ni-Ga alloy is used to generate electricity alcohols catalyzed CO₂ conversion catalytic processes, and to study the mechanisms of deposition and catalytic properties, the purpose is to enable stable and efficient catalytic reaction can occur, generating fewer byproducts for recycling carbon-based energy for preparing a catalyst having excellent catalytic activity and stability.This paper selects the 1-butyl-3-methylimidazolium trifluoromethanesulfonate（[BMIM] [TFO]） is an ionic liquid solvent to prepare a master mix of different concentration of electrolyte system. Through the study of cyclic voltammetry curves determined Ni and Ga coexist deposition potential, and uses potentiostatic deposition method were discussed single metal Ni and electrodeposition, the experiment Ni-Ga alloys were investigated system, substrate potential, time, temperature and other factors that affect a series of Ni-Ga alloy electrodeposition on, the effects of different process conditions on alloy composition and surface morphology. Experimental results show that succeeded in ionic liquids electrodeposition paper prepared by the Ni-Ga alloy, morphology spherical nanoparticles, neatly arranged compactly. Containing 40mmol/L Ni Cl2 and 60mmol/L Ga Cl3 mixed electrolyte system, controlling the temperature of 75℃, potential of-1.8V, on the porous carbon material may be deposited to prepare a size of 1⁵nm of Ni-Ga alloy nano-particles.Preparation of electrodeposition of Ni-Ga alloys were characterized. XRD results show, Ni-Ga alloy mainly Ni7Ga3, having a（100）,（220）,（200） three planes. Elements by XPS valence state analysis of alloys, Ni-Ga alloy mixture prepared in this project as Ni, Ga and Ni7Ga3 composed think.Respectively in CO₂ and Ar atmosphere saturated 0.5mol/L KHCO3 solution by cyclic voltammetry and current-time curve electrochemical testing techniques, comparative study of the catalytic properties under different conditions obtained NiGa alloy. Experimental results show that the control system Ni and Ga ion concentration ratio of 1:2, the temperature 70℃, the potential of-1.8V, deposition time 60 s, the catalytic properties of the matrix when the porous carbon material, prepared Ni-Ga alloy the best.