title: Electrochemical and thermodynamic properties of Ln(III) (Ln = Eu, Sm, Dy, Nd) in 1-butyl-3-methylimidazolium bromide ionic liquid.
abstract: The electrochemical behavior and thermodynamic properties of Ln(III) (Ln = Eu, Sm, Dy, Nd) were studied in 1-butyl-3-methylimidazolium bromide ionic liquid (BmimBr) at a glassy carbon (GC) electrode in the range of 293-338 K. The electrode reaction of Eu(III) was found to be quasi-reversible by the cyclic voltammetry, the reactions of the other three lanthanide ions were regarded as irreversible systems. An increase of the current intensity was obtained with the temperature increase. At 293 K, the cathodic peak potentials of -0.893 V (Eu(III)), -0.596 V (Sm(III)), -0.637 V (Dy(III)) and -0.641 V (Nd(III)) were found, respectively, to be assigned to the reduction of Ln(III) to Ln(II). The diffusion coefficients (Do), the transfer coefficients (α) of Ln(III) (Ln = Eu, Sm, Dy, Nd) and the charge transfer rate constants (ks) of Eu(III) were estimated. The apparent standard potential (E0*) and the thermodynamic properties of the reduction of Eu(III) to Eu(II) were also investigated.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Yang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Ling
authors.initials: L
authors.lastname: He
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Song
authors.initials: S
authors.lastname: Qin
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Guo-Hong
authors.initials: GH
authors.lastname: Tao
authors.affiliation: Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Huang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Lv
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D008962:Models, Theoretical; D013816:Thermodynamics
chemical_list: D007093:Imidazoles; D052578:Ionic Liquids; C502841:1-butyl-3-methylimidazolium chloride
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