Journal
NEW JOURNAL OF CHEMISTRY
Volume 38, Issue 8, Pages 3606-3612Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nj00519h
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Funding
- CILIS - Fondo de Innovacion para la Competitividad, del Ministerio de Economia, Fomento y Turismo, Chile [ICM-P10-003-F]
- FONDECYT [1100203]
- CONICYT [21120676, 21130709]
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Electro-catalytic reduction of carbon dioxide has been studied with cobalt 5,10,15,20 tetrakis(4-aminophenyl)porphyrin forming a conducting polymer on an indium tin oxide electrode, using an ionic liquid as a novel reaction media. Electrocatalytic reduction of CO2 has been carried out, the potential at which this occurs has been reduced from -2.4 V vs. Ag/AgCl reported before, to -0.8 V vs. Ag/AgCl which means a significant energy gain regarding the electrochemical fixation of CO2. Electrochemical impedance spectroscopy (EIS) experiments have been carried out in order to understand the electrical behavior of the modified electrode in ionic liquid medium. Spectroelectrochemical evidence suggests that the reactive species which promotes the reaction is an electrochemically generated Co(I) porphyrin species which can be detected in an inert atmosphere but not in the carbon dioxide saturated medium.
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