The electroreduction of benzoic acid: voltammetric observation of adsorbed hydrogen at a platinum microelectrode in room temperature ionic liquids

Yao Meng, Sarah Norman, Christopher Hardacre, Richard G. Compton*

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The electrochemical reduction of benzoic acid in the presence and absence of hydrogen (H-2) has been investigated using a 10 mu m diameter platinum microelectrode in four different room temperature ionic liquids (RTILs), namely [C(4)mim][NTf2], [C(4)mpyrr][NTf2], [C(4)mim][OTf] and [C(4)mim][BF4], versus Ag/Ag+. In all cases, reductive voltammetry is observed, and is suggested to occur via a CE mechanism in which dissociation of benzoic acid is followed by electron transfer to H+ ultimately forming adsorbed hydrogen. Furthermore, the adsorbed H atoms, formed from the reduction of benzoic acid, could be used to achieve the rapid hydrogenolysis of the organic compound (bis(benzyloxycarbonyl)-L-lysine) on the timescale of the voltammetric technique under moderate conditions (25 °C).

Original languageEnglish
Pages (from-to)2031-2036
Journal Physical Chemistry Chemical Physics
Volume15
Issue number6
Early online date10 Dec 2012
DOIs
Publication statusPublished - 14 Feb 2013

Keywords

  • EVOLUTION REACTION
  • KINETICS
  • MOLTEN-SALTS
  • PALLADIUM
  • DISSOLVED HYDROGEN
  • ELECTROCHEMICAL REDUCTION
  • BEHAVIOR
  • ALLOYS
  • SORPTION
  • ELECTRO-OXIDATION

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