Mechanistic studies of CO{sub 2} reduction on a mediated electrode with conducting polymer and inorganic conductor films
- Yamaguchi Univ, Ube (Japan). Dept. of Applied Chemistry
Electrocatalytic reduction of CO{sub 2} on a metal complex-immobilized polyaniline (PAn)/Prussian blue (PB)-laminated electrode has been investigated by means of long-term electrolysis, liquid chromatography/mass spectroscopy (LC/MS) and in situ Fourier transform infrared (FTIR) reflection absorption spectroscopy. The major products were lactic, acetic, and formic acids, methanol, and ethanol. The roles of PAn and the metal complex [1,8-dihydroxynaphthalene-3,6-disulfonatoferrate(II)] are to render CO{sub 2} chemically active by combining the electrophilic carbon atom with the amino group of PAn and the basic oxygen atom with the central metal of the complex, and that of PB is to provide catalytically H{sub ads} atoms on its zeolitic lattice. The activated CO{sub 2} is hydrogenated and converted to organic acids and alcohols by the reaction with H{sub ads} atoms. It is suggested that formaldehyde is a precursor for the organic acids (except formic acid) and alcohols and the insertion reactions of CO{sub 2} into intermediates are essential to the formation of C{sub 2} and C{sub 3} compounds.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 289410
- Journal Information:
- Journal of the Electrochemical Society, Vol. 145, Issue 11; Other Information: PBD: Nov 1998
- Country of Publication:
- United States
- Language:
- English
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