TY - GEN
T1 - Electrode reactions of platinum bromide complexes in an amide-type ionic liquid
AU - Endo, T.
AU - Katayama, Y.
AU - Miura, T.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
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U2 - 10.1149/05011.0191ecst
DO - 10.1149/05011.0191ecst
M3 - Conference contribution
AN - SCOPUS:84885699801
SN - 9781607683599
T3 - ECS Transactions
SP - 191
EP - 197
BT - Molten Salts and Ionic Liquids 18
PB - Electrochemical Society Inc.
T2 - 18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting
Y2 - 7 October 2012 through 12 October 2012
ER -