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

T. Endo, Y. Katayama, T. Miura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 halides were dissolved in BMPTFSA with addition of halide salts of BMP+. Ultraviolet and visible absorption spectra of electrolytes revealed that the coordination environment of Pt(II) and Pt(IV) were [PtBr4]2-and [PtBr6]2- , respectively. The cyclic voltammogram in BMPTFSA containing 10 mM [PtBr6]2-showed two reduction peaks at -1.2 V and -2.6 V. The diffusion coefficients of the [PtBr 4]2- and [PtBr6]2- were calculated to be 1.5 × 10-7 and 0.49 × 10-7 cm 2 s-1 in BMPTFSA, respectively, by chronoamperometry. Electrodeposition of platinum in BMPTFSA containing 10 mM [PtBr 4]2- was attempted by potentiostatic cathodic reduction at -2.6 V. Nano-particles (2-3 nm in diameter) in the electrolyte after potentiostatic cathodic reduction were observed by transmission electron microscopy. The nano-particles were found to be metallic platinum by electron diffraction.

Original languageEnglish
Title of host publicationMolten Salts and Ionic Liquids 18
Pages191-197
Number of pages7
Edition11
DOIs
Publication statusPublished - 2012 Dec 1
Event18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting - Honolulu, HI, United States
Duration: 2012 Oct 72012 Oct 12

Publication series

NameECS Transactions
Number11
Volume50
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting
CountryUnited States
CityHonolulu, HI
Period12/10/712/10/12

ASJC Scopus subject areas

  • Engineering(all)

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    Endo, T., Katayama, Y., & Miura, T. (2012). Electrode reactions of platinum bromide complexes in an amide-type ionic liquid. In Molten Salts and Ionic Liquids 18 (11 ed., pp. 191-197). (ECS Transactions; Vol. 50, No. 11). https://doi.org/10.1149/05011.0191ecst