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Electroreduction of carbon dioxide at a lead electrode in propylene carbonate: A spectroscopic study

Paper ID Volume ID Publish Year Pages File Format Full-Text
47333 46468 2010 7 PDF Available
Title
Electroreduction of carbon dioxide at a lead electrode in propylene carbonate: A spectroscopic study
Abstract

The electrochemical reduction of carbon dioxide at a lead electrode was studied in propylene carbonate (PrC) containing tetraethylammonium perchlorate (TEAP) as electrolyte. Different electrochemical techniques such as cyclic voltammetry and chronoamperometry were used to evaluate the catalytic activity of this material towards CO2 electrodimerization. The electroreduction process was also investigated by in situ infrared reflectance spectroscopy in order to determine adsorbed intermediates and reaction products. The peak of reduction observed in cyclic voltammetry starting at −2.05 V vs. Ag/AgCl has been clearly ascribed to the carbon dioxide reduction by SPAIRS technique. Infrared reflectance spectroscopy also confirmed the absence of CO at the lead cathode during chronoamperometric measurements and that oxalate has been formed concurrently to the CO2 consumption. Combining the analytic and spectroscopic results, a reaction mechanism was proposed for the reduction of carbon dioxide to oxalate ions on a lead cathode in a nonaqueous aprotic medium.

Keywords
Pb electrode; CO2 reduction; In situ IR reflectance spectroscopy; Propylene carbonate; Oxalate
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Electroreduction of carbon dioxide at a lead electrode in propylene carbonate: A spectroscopic study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 98, Issues 1–2, 20 July 2010, Pages 65–71
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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