Jump to main content
Jump to site search

Volume 197, 2017
Previous Article Next Article

In situ spectroscopic monitoring of CO2 reduction at copper oxide electrode

Author affiliations

Abstract

Copper oxide modified electrodes were investigated as a function of applied electrode potential using in situ infrared spectroscopy and ex situ Raman and X-ray photoelectron spectroscopy. In deoxygenated KHCO3 electrolyte bicarbonate and carbonate species were found to adsorb to the electrode during reduction and the CuO was reduced to Cu(I) or Cu(0) species. Carbonate was incorporated into the structure and the CuO starting material was not regenerated on cycling to positive potentials. In contrast, in CO2 saturated KHCO3 solution, surface adsorption of bicarbonate and carbonate was not observed and adsorption of a carbonato-species was observed with in situ infrared spectroscopy. This species is believed to be activated, bent CO2. On cycling to negative potentials, larger reduction currents were observed in the presence of CO2; however, less of the charge could be attributed to the reduction of CuO. In the presence of CO2 CuO underwent reduction to Cu2O and potentially Cu, with no incorporation of carbonate. Under these conditions the CuO starting material could be regenerated by cycling to positive potentials.

Back to tab navigation

Article information


Submitted
01 Sep 2016
Accepted
21 Sep 2016
First published
21 Sep 2016

Faraday Discuss., 2017,197, 517-532
Article type
Paper

In situ spectroscopic monitoring of CO2 reduction at copper oxide electrode

L. Wang, K. Gupta, J. B. M. Goodall, J. A. Darr and K. B. Holt, Faraday Discuss., 2017, 197, 517
DOI: 10.1039/C6FD00183A

Social activity

Search articles by author

Spotlight

Advertisements