Journal
ELECTROCHIMICA ACTA
Volume 58, Issue -, Pages 165-171Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.09.032
Keywords
FTIRS; Electro-catalytic; Cu electrode; Shikimic acid; Transaconitate
Categories
Funding
- National Science Foundation of China [20735002, 20975022]
- National Basic Research Program of China [2010CB732403]
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In this paper, in situ Fourier Transform Infrared Spectroscopy (FTIRS) is used to study the electro-catalytic oxidation mechanism of shikimic acid (SA) at a copper electrode in H2O and D2O solution, respectively. As the potential is applied between 0.1 V and 0.2V vs. SCE, SA is oxidized to 3-dehydroshikimic acid (DHS). Then a significant change appeared when the potential is scanned from 0.3 V to 0.8 V, DHS is decomposed to transaconitate and formate. As the potential is over 0.9 V, formate is further oxidized to CO2. Density functional theory (OFT) calculation of the IR spectra is in good agreement with the experimental observation. The adsorption of transaconitate through carboxyl on copper electrode is also evidenced by p- and s-polarized radiation in FTIRS. (C) 2011 Elsevier Ltd. All rights reserved.
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