Electrochemical Behaviors Of Ce(?), Gd(?) And Nd(?) In Ionic Liquids

The electrochemical mechanism of CeCl₃,GdCl₃ and NdCl₃ were studied in ionic liquids.The electrochemical behaviors of Ce?III?,Gd?III?and Nd?III?ions were investigated on Pt and GC electrodes in bmimCl and bmim BF₄ ionic liquids.The films contained cerium,gadolinium and neodymium element were obtained by potentiostatic deposition,respectively.?1?At 363K,the electrochemical behaviors of Ce?III?ion in bmimBF₄ and bmimCl were studied by cyclic voltammetry,square wave voltammetry and chronopotentiometry at Pt and GC electrodes.The diffusion coefficient and activation energy of diffusion etc kinetics properties of reaction of Ce?III?were determined.The Ce?III?could be reducted to Ce?II?in both bmimBF₄and bmimCl at Pt electrode and Ce?0?in bmimBF₄ at GC electrode.In addition,the CeCl_3?s?could react with a mass of Cl^-from bmimCl to form[CeCl₆]^3-,then be oxidated to[CeCl₆]^2-.The films contain cerium was obtained by potentiostatic deposition the surface of Cu electrode.The surface topography and element content of film were showed by SEM micrographs and EDS analysis.?2?At 363K,the electrochemical behaviors of GdCl₃ in bmimBF₄ and bmimCl were studied by cyclic voltammetry,chronopotentiometry,and Chronoamperometry at the work electrodes of Pt and GC.The reduction potention of Gd?III?were-0.35V and-0.52V in bmimBF₄ and bmimCl at Pt electrode.However,the Gd?III?only can be reducted to Gd?0?in bmim BF₄ at the GC as work electrode.The diffusion coefficient and activation energy of diffusion etc data of Gd?III?were determined.A film containing of gadolinium element was obtained by potentiostatic deposition.?3?At 363K,the electrochemical behavior of Nd?III?was studied at Pt electrode.The reduction potention of Nd?III?in bmimBF₄ were determined by cyclic voltammetry and chronopotentiometry.The electrochemical behavior of NdCl₃ in bmimCl was studied at Pt electrode.The reduction potention of Nd?III?in bmimCl were determined by cyclic voltammetry,and the reduction of Nd?III?to Nd?II?was at-0.4V.The diffusion coefficients and activation energy of diffusion of Nd?III?in bmimCl and bmimBF₄ ionic liquids were determined,and the electrodeposition of neodymium element was explored at copper electrode.