Wang, L;
Gupta, K;
Goodall, JBM;
Darr, JA;
Holt, KB;
(2017)
In situ spectroscopic monitoring of CO2 reduction at copper oxide electrode.
Faraday Discussions
, 197
pp. 517-532.
10.1039/c6fd00183a.
Preview |
Text
Holt_CuO_FD_19_09_2016_with figs.pdf - Accepted Version Download (524kB) | Preview |
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.
Type: | Article |
---|---|
Title: | In situ spectroscopic monitoring of CO2 reduction at copper oxide electrode |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1039/c6fd00183a |
Publisher version: | http://doi.org/10.1039/c6fd00183a |
Language: | English |
Additional information: | © The Royal Society of Chemistry 2017. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
URI: | https://discovery.ucl.ac.uk/id/eprint/1542044 |
Archive Staff Only
View Item |