Electrode reactions of platinum bromide complexes in an amide-type ionic liquid

Yasushi Katayama, Tomoyuki Endo, Takashi Miura, Kazunobu Toshima

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13 Citations (Scopus)

Abstract

The electrode reactions of platinum bromide complexes were investigated in an amide-type room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA). Platinum bromides were dissolved in BMPTFSA with addition of BMPBr. Ultraviolet and visible absorption spectra of the electrolytes revealed that Pt(II) and Pt(IV) species were dissolved as [PtIIBr4]2- and [PtIVBr 6]2-, respectively. The cyclic voltammogram in BMPTFSA containing 10 mM [PtIVBr6]2- showed two reduction peaks at -1.2 and -2.6 V, which can be assigned to reduction of [PtIVBr6]2- and [PtIIBr 4]2-, respectively. The diffusion coefficients of the [PtIIBr4]2- and [PtIVBr 6]2- at 25°C were determined to be 1.5 × 10 -7 and 0.49 × 10-7 cm2 s-1 in BMPTFSA, respectively, by chronoamperometry. Electrodeposition of metallic platinum was possible by galvanostatic cathodic reduction on a glassy carbon electrode in BMPTFSA containing 10 mM [PtIIBr4] 2-. In addition, platinum nano-particles (2-3 nm in diameter) formed and dispersed in the ionic liquid after potentiostatic cathodic reduction at -2.6 V. Platinum nano-particles could be collected by heating the ionic liquid containing the nano-particles with carbon black at 200°C.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume160
Issue number10
DOIs
Publication statusPublished - 2013

Fingerprint

Ionic Liquids
Platinum
Bromides
Amides
Ionic liquids
amides
bromides
platinum
Electrodes
electrodes
liquids
Soot
Chronoamperometry
Glassy carbon
Electrodeposition
ultraviolet absorption
glassy carbon
Electrolytes
Absorption spectra
Carbon black

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Electrode reactions of platinum bromide complexes in an amide-type ionic liquid. / Katayama, Yasushi; Endo, Tomoyuki; Miura, Takashi; Toshima, Kazunobu.

In: Journal of the Electrochemical Society, Vol. 160, No. 10, 2013.

Research output: Contribution to journalArticle

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