Electrochemical reduction of benzoic acid and substituted benzoic acids in some room temperature ionic liquids

D.S. Silvester; W.S. He; Leigh Aldous; Christopher Hardacre; R.G. Compton

doi:10.1021/jp802996q

Electrochemical reduction of benzoic acid and substituted benzoic acids in some room temperature ionic liquids

D.S. Silvester, W.S. He, Leigh Aldous, Christopher Hardacre, R.G. Compton

School of Chemistry and Chemical Engineering

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

32 Citations (Scopus)

Abstract

Using cyclic voltammetry, the electrochemical reduction of benzoic acid (BZA) has been studied at Pt and Au microelectrodes (10 and 2 mu m diameter) in six room temperature ionic liquids (RTILs), namely [C(2)mim][NTf2], [C(4)mim][NTf2], [C(4)mpyrr][NTf2], [C(4)mim][BF4], [C(4)mim][NO3], and [C(4)mim][PF6] (where [C(n)mim](+) = 1-alkyl-3-methylimidazolium, [NTf2](-) = bis(trifluoromethylsulfonyl)imide, [C(4)mpyrr](+) = N-butyl-N-methylpyrrolidinium, [BF4](-) = tetrafluoroborate, [NO3](-) = nitrate, and [PF6](-) = hexafluorophosphate). In all cases, a main reduction peak was observed, assigned to the reduction of BZA in a CE mechanism, where dissociation of the acid takes place before electron transfer to the dissociated proton. One anodic peak was observed on the reverse sweep, assigned to the oxidation of adsorbed hydrogen, and a reductive

Original language	English
Pages (from-to)	12966-12973
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	33
DOIs	https://doi.org/10.1021/jp802996q
Publication status	Published - 21 Aug 2008

ASJC Scopus subject areas

Physical and Theoretical Chemistry
General Energy
Electronic, Optical and Magnetic Materials
Surfaces, Coatings and Films

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title = "Electrochemical reduction of benzoic acid and substituted benzoic acids in some room temperature ionic liquids",

abstract = "Using cyclic voltammetry, the electrochemical reduction of benzoic acid (BZA) has been studied at Pt and Au microelectrodes (10 and 2 mu m diameter) in six room temperature ionic liquids (RTILs), namely [C(2)mim][NTf2], [C(4)mim][NTf2], [C(4)mpyrr][NTf2], [C(4)mim][BF4], [C(4)mim][NO3], and [C(4)mim][PF6] (where [C(n)mim](+) = 1-alkyl-3-methylimidazolium, [NTf2](-) = bis(trifluoromethylsulfonyl)imide, [C(4)mpyrr](+) = N-butyl-N-methylpyrrolidinium, [BF4](-) = tetrafluoroborate, [NO3](-) = nitrate, and [PF6](-) = hexafluorophosphate). In all cases, a main reduction peak was observed, assigned to the reduction of BZA in a CE mechanism, where dissociation of the acid takes place before electron transfer to the dissociated proton. One anodic peak was observed on the reverse sweep, assigned to the oxidation of adsorbed hydrogen, and a reductive",

author = "D.S. Silvester and W.S. He and Leigh Aldous and Christopher Hardacre and R.G. Compton",

year = "2008",

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doi = "10.1021/jp802996q",

language = "English",

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journal = "Journal of Physical Chemistry C",

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T1 - Electrochemical reduction of benzoic acid and substituted benzoic acids in some room temperature ionic liquids

AU - Silvester, D.S.

AU - He, W.S.

AU - Aldous, Leigh

AU - Hardacre, Christopher

AU - Compton, R.G.

PY - 2008/8/21

Y1 - 2008/8/21

N2 - Using cyclic voltammetry, the electrochemical reduction of benzoic acid (BZA) has been studied at Pt and Au microelectrodes (10 and 2 mu m diameter) in six room temperature ionic liquids (RTILs), namely [C(2)mim][NTf2], [C(4)mim][NTf2], [C(4)mpyrr][NTf2], [C(4)mim][BF4], [C(4)mim][NO3], and [C(4)mim][PF6] (where [C(n)mim](+) = 1-alkyl-3-methylimidazolium, [NTf2](-) = bis(trifluoromethylsulfonyl)imide, [C(4)mpyrr](+) = N-butyl-N-methylpyrrolidinium, [BF4](-) = tetrafluoroborate, [NO3](-) = nitrate, and [PF6](-) = hexafluorophosphate). In all cases, a main reduction peak was observed, assigned to the reduction of BZA in a CE mechanism, where dissociation of the acid takes place before electron transfer to the dissociated proton. One anodic peak was observed on the reverse sweep, assigned to the oxidation of adsorbed hydrogen, and a reductive

AB - Using cyclic voltammetry, the electrochemical reduction of benzoic acid (BZA) has been studied at Pt and Au microelectrodes (10 and 2 mu m diameter) in six room temperature ionic liquids (RTILs), namely [C(2)mim][NTf2], [C(4)mim][NTf2], [C(4)mpyrr][NTf2], [C(4)mim][BF4], [C(4)mim][NO3], and [C(4)mim][PF6] (where [C(n)mim](+) = 1-alkyl-3-methylimidazolium, [NTf2](-) = bis(trifluoromethylsulfonyl)imide, [C(4)mpyrr](+) = N-butyl-N-methylpyrrolidinium, [BF4](-) = tetrafluoroborate, [NO3](-) = nitrate, and [PF6](-) = hexafluorophosphate). In all cases, a main reduction peak was observed, assigned to the reduction of BZA in a CE mechanism, where dissociation of the acid takes place before electron transfer to the dissociated proton. One anodic peak was observed on the reverse sweep, assigned to the oxidation of adsorbed hydrogen, and a reductive

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U2 - 10.1021/jp802996q

DO - 10.1021/jp802996q

M3 - Article

SN - 1932-7447

VL - 112

SP - 12966

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 33

ER -

Electrochemical reduction of benzoic acid and substituted benzoic acids in some room temperature ionic liquids

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