Ethylene glycol electrochemical oxidation at platinum probed by ion chromatography and infrared spectroscopy

Austin Dailey, Jungwon Shin, Carol Korzeniewski

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58 Scopus citations

Abstract

Wet chemical methods were used in combination with in situ infrared spectroscopy to identify and quantify soluble products formed during ethylene glycol electrochemical oxidation on platinum. A small volume electrolysis technique allowed reactions to be performed in samples of 150 μl in contact with a small, bead-type single crystal electrode. Following reaction, 50-100 μl aliquots were assayed for aldehydes and carboxylic acids. Glycolaldehyde (HOCH2CHO), and glycolic (HOCH2COOH) and oxalic ((HOOC)2) acids were detected following the 360 s electrolysis of 0.2 M ethylene glycol in 0.1 M HClO4 at potentials in the range 0.0-0.6 V (vs. SCE). Determination of the carboxylic acids by ion chromatography aided the assignment of carboxylate vibrational bands in in situ infrared spectra.

Original languageEnglish
Pages (from-to)1147-1152
Number of pages6
JournalElectrochimica Acta
Volume44
Issue number6-7
DOIs
StatePublished - Nov 1 1998

Keywords

  • Ethylene glycol
  • Infrared spectroscopy
  • Organic oxidation reactions
  • Oxidation
  • Platinum

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