Electrochemical preparation of palladium nanoparticles in bis(trifluoromethylsulfonyl)amide ionic liquids consisting of pyrrolidinium cations with different alkyl chain lengths

Yasushi Katayama, Yosuke Oshino, Naoaki Ichihashi, Naoki Tachikawa, Kazuki Yoshii, Kazunobu Toshima

Research output: Contribution to journalArticle

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Abstract

Electrochemical preparation of palladium nanoparticles has been investigated in the bis(trifluoromethylsulfonyl) amide (TFSA-) ionic liquids composed of 1-butyl-1-methypyrrolidinium (BMP+), 1-hexyl-1-methylpyrrolidinium (HMP+) and 1-decyl-1-methylpyrrolidinium (DMP+) containing [PdBr4]2-. Cathodic reduction of [PdBr4]2- on a carbon electrode below -2.2 V vs. Ag|Ag(I) in the ionic liquids resulted in formation of palladium nanoparticles, which were confirmed by transmission electron microscopy and electron diffraction. The average particle sizes of the nanoparticles obtained at -2.6 V in BMPTFSA, HMPTFSA and DMPTFSA were 2.9 ± 0.6, 3.0 ± 0.8 and 3.2 ± 0.8 nm, respectively, indicating the average particle size was slightly dependent on the ionic liquid. The nanoparticles dispersed in the ionic liquids are considered to form by inhibition of crystal growth with the organic cations accumulated on the negatively polarized electrode surface.

Original languageEnglish
Pages (from-to)37-41
Number of pages5
JournalElectrochimica Acta
Volume183
DOIs
Publication statusPublished - 2015 Nov 20

Fingerprint

Ionic Liquids
Palladium
Chain length
Amides
Ionic liquids
Cations
Positive ions
Nanoparticles
Particle size
Electrodes
Crystallization
Crystal growth
Electron diffraction
Carbon
Transmission electron microscopy

Keywords

  • electrodeposition
  • ionic liquid
  • nanoparticle
  • palladium

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

Cite this

Electrochemical preparation of palladium nanoparticles in bis(trifluoromethylsulfonyl)amide ionic liquids consisting of pyrrolidinium cations with different alkyl chain lengths. / Katayama, Yasushi; Oshino, Yosuke; Ichihashi, Naoaki; Tachikawa, Naoki; Yoshii, Kazuki; Toshima, Kazunobu.

In: Electrochimica Acta, Vol. 183, 20.11.2015, p. 37-41.

Research output: Contribution to journalArticle

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