Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid

Yan Li Zhu; Yukari Kozuma; Yasushi Katayama; Takashi Miura

doi:10.1016/j.electacta.2009.07.088

Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid

Yan Li Zhu, Yukari Kozuma, Yasushi Katayama^*, Takashi Miura

^*Corresponding author for this work

Keio University

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

Abstract

Electrochemical reaction of Ni(II)/Ni was investigated in a hydrophobic room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing Ni(TFSA)₂ as a Ni source. The UV-vis spectra showed that Ni(II) in BMPTFSA is octahedrally coordinated with TFSA^- anions. The average activation energy for the diffusion coefficients of this Ni(II) complex was ∼26 kJ mol^-1, which was close to that for the viscosity. The diffusion coefficient of Ni(II) was estimated to be 9.3 × 10^-8 cm² s^-1. Chronoamperometric measurements showed that the electrodeposition of Ni on a platinum substrate involved three-dimensional instantaneous nucleation under diffusion control at room-temperature. The electrodeposits obtained by galvanostatic electrolysis with the current density of -0.046 mA cm^-2 at 70 and 100 °C were identified as metallic Ni by XRD.

Original language	English
Pages (from-to)	7502-7506
Number of pages	5
Journal	Electrochimica Acta
Volume	54
Issue number	28
DOIs	https://doi.org/10.1016/j.electacta.2009.07.088
Publication status	Published - 1 Dec 2009
Externally published	Yes

Keywords

1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide
Electrodeposition
Ionic liquid
Nickel
Room-temperature molten salt

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10.1016/j.electacta.2009.07.088

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title = "Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid",

abstract = "Electrochemical reaction of Ni(II)/Ni was investigated in a hydrophobic room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing Ni(TFSA)2 as a Ni source. The UV-vis spectra showed that Ni(II) in BMPTFSA is octahedrally coordinated with TFSA- anions. The average activation energy for the diffusion coefficients of this Ni(II) complex was ∼26 kJ mol-1, which was close to that for the viscosity. The diffusion coefficient of Ni(II) was estimated to be 9.3 × 10-8 cm2 s-1. Chronoamperometric measurements showed that the electrodeposition of Ni on a platinum substrate involved three-dimensional instantaneous nucleation under diffusion control at room-temperature. The electrodeposits obtained by galvanostatic electrolysis with the current density of -0.046 mA cm-2 at 70 and 100 °C were identified as metallic Ni by XRD.",

keywords = "1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide, Electrodeposition, Ionic liquid, Nickel, Room-temperature molten salt",

author = "Zhu, {Yan Li} and Yukari Kozuma and Yasushi Katayama and Takashi Miura",

year = "2009",

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doi = "10.1016/j.electacta.2009.07.088",

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T1 - Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid

AU - Zhu, Yan Li

AU - Kozuma, Yukari

AU - Katayama, Yasushi

AU - Miura, Takashi

PY - 2009/12/1

Y1 - 2009/12/1

N2 - Electrochemical reaction of Ni(II)/Ni was investigated in a hydrophobic room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing Ni(TFSA)2 as a Ni source. The UV-vis spectra showed that Ni(II) in BMPTFSA is octahedrally coordinated with TFSA- anions. The average activation energy for the diffusion coefficients of this Ni(II) complex was ∼26 kJ mol-1, which was close to that for the viscosity. The diffusion coefficient of Ni(II) was estimated to be 9.3 × 10-8 cm2 s-1. Chronoamperometric measurements showed that the electrodeposition of Ni on a platinum substrate involved three-dimensional instantaneous nucleation under diffusion control at room-temperature. The electrodeposits obtained by galvanostatic electrolysis with the current density of -0.046 mA cm-2 at 70 and 100 °C were identified as metallic Ni by XRD.

AB - Electrochemical reaction of Ni(II)/Ni was investigated in a hydrophobic room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing Ni(TFSA)2 as a Ni source. The UV-vis spectra showed that Ni(II) in BMPTFSA is octahedrally coordinated with TFSA- anions. The average activation energy for the diffusion coefficients of this Ni(II) complex was ∼26 kJ mol-1, which was close to that for the viscosity. The diffusion coefficient of Ni(II) was estimated to be 9.3 × 10-8 cm2 s-1. Chronoamperometric measurements showed that the electrodeposition of Ni on a platinum substrate involved three-dimensional instantaneous nucleation under diffusion control at room-temperature. The electrodeposits obtained by galvanostatic electrolysis with the current density of -0.046 mA cm-2 at 70 and 100 °C were identified as metallic Ni by XRD.

KW - 1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide

KW - Electrodeposition

KW - Ionic liquid

KW - Nickel

KW - Room-temperature molten salt

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U2 - 10.1016/j.electacta.2009.07.088

DO - 10.1016/j.electacta.2009.07.088

M3 - Article

AN - SCOPUS:70349481738

SN - 0013-4686

VL - 54

SP - 7502

EP - 7506

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 28

ER -

Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid

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