Electrochemical behavior of samarium, europium, and ytterbium in hydrophobic room-temperature molten salt systems

Masaki Yamagata, Yasushi Katayama, Takashi Miura

Research output: Contribution to journalArticle

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Abstract

The electrochemical behavior of samarium (Sm), europium (Eu), and ytterbium (Yb) was investigated in the hydrophobic room-temperature molten salts based on bis(trifluoromethylsulfonyl)imide (TFSI -) combined with either 1-ethyl-3-methylimidazolium (EMI +) or 1-n-butyl-1-methylpyrrolidinium (BMP +). The redox reactions of Sm(III)/Sm(II), Eu(III)/Eu(II), and Yb(III)/Yb(II) were observed at -1.6, -0.3, and -1.0V vs Ag/Ag(I), respectively. In all cases, the electrode reactions were found to be quasi- or irreversible by the cyclic voltammetry. The diffusion coefficients of these lanthanides were estimated to be ∼10 -8cm 2s -1 by chronoamperometry and chronopotentiometry, indicating that their mobility is rather low, probably due to the complex formation or the strong coulombic interaction with TFSI -. The redox potentials of these divalent and trivalent lanthanide couples suggested that the donor property of TFSI --based room-temperature molten salts was lower than that of other conventional solvents.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume153
Issue number1
DOIs
Publication statusPublished - 2006

Fingerprint

Ytterbium
Samarium
Europium
Imides
samarium
molten salts
imides
ytterbium
europium
Molten materials
Lanthanoid Series Elements
Salts
Rare earth elements
room temperature
Chronoamperometry
Redox reactions
Temperature
Cyclic voltammetry
diffusion coefficient
Electrodes

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Electrochemical behavior of samarium, europium, and ytterbium in hydrophobic room-temperature molten salt systems. / Yamagata, Masaki; Katayama, Yasushi; Miura, Takashi.

In: Journal of the Electrochemical Society, Vol. 153, No. 1, 2006.

Research output: Contribution to journalArticle

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