skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electrochemical reduction of CO{sub 2} with a functional gas-diffusion electrode in aqueous solutions with and without propylene carbonate

Abstract

A functional gas-diffusion electrode consisting of a modified platinum mesh electrode and a glass filter has been developed in order to convert CO{sub 2} to a useful substance at an overpotential as low as possible. The modification was made by laminating Prussian blue (inner) and polyaniline (outer) on a Pt mesh substrate, and a metal complex was further immobilized onto polyaniline. The improvement of the usefulness of the product and the required overpotential was brought about by using such functional gas-diffusion electrode in a KCl aqueous solution containing 10% propylene carbonate. This is attributed to the maintenance of a high concentration of CO{sub 2} at the electrode surface owing to the direct supply of CO{sub 2} through the gas phase, the high solubility of CO{sub 2} to the solution, and the stabilization of reaction intermediates. The maximum total current efficiency for the reduction of CO{sub 2} was 74.9% at -0.6 V vs. Ag/AgCl, and the main products were ethanol and lactic acid.

Authors:
;
Publication Date:
Research Org.:
Yamaguchi Univ., Ube (JP)
OSTI Identifier:
20001087
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 146; Journal Issue: 10; Other Information: PBD: Oct 1999; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CHEMICAL PREPARATION; ELECTROCHEMISTRY; REDUCTION; CARBON DIOXIDE; DIFFUSION; ELECTRODES; AQUEOUS SOLUTIONS; CARBONIC ACID ESTERS; GASES

Citation Formats

Ogura, Kotaro, and Endo, Nobutaka. Electrochemical reduction of CO{sub 2} with a functional gas-diffusion electrode in aqueous solutions with and without propylene carbonate. United States: N. p., 1999. Web. doi:10.1149/1.1392542.
Ogura, Kotaro, & Endo, Nobutaka. Electrochemical reduction of CO{sub 2} with a functional gas-diffusion electrode in aqueous solutions with and without propylene carbonate. United States. https://doi.org/10.1149/1.1392542
Ogura, Kotaro, and Endo, Nobutaka. 1999. "Electrochemical reduction of CO{sub 2} with a functional gas-diffusion electrode in aqueous solutions with and without propylene carbonate". United States. https://doi.org/10.1149/1.1392542.
@article{osti_20001087,
title = {Electrochemical reduction of CO{sub 2} with a functional gas-diffusion electrode in aqueous solutions with and without propylene carbonate},
author = {Ogura, Kotaro and Endo, Nobutaka},
abstractNote = {A functional gas-diffusion electrode consisting of a modified platinum mesh electrode and a glass filter has been developed in order to convert CO{sub 2} to a useful substance at an overpotential as low as possible. The modification was made by laminating Prussian blue (inner) and polyaniline (outer) on a Pt mesh substrate, and a metal complex was further immobilized onto polyaniline. The improvement of the usefulness of the product and the required overpotential was brought about by using such functional gas-diffusion electrode in a KCl aqueous solution containing 10% propylene carbonate. This is attributed to the maintenance of a high concentration of CO{sub 2} at the electrode surface owing to the direct supply of CO{sub 2} through the gas phase, the high solubility of CO{sub 2} to the solution, and the stabilization of reaction intermediates. The maximum total current efficiency for the reduction of CO{sub 2} was 74.9% at -0.6 V vs. Ag/AgCl, and the main products were ethanol and lactic acid.},
doi = {10.1149/1.1392542},
url = {https://www.osti.gov/biblio/20001087}, journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 10,
volume = 146,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1999},
month = {Fri Oct 01 00:00:00 EDT 1999}
}