dc.creator | BATISTA, Elisete A. | |
dc.creator | TEMPERINI, Marcia L. A. | |
dc.date.accessioned | 2012-10-20T05:23:23Z | |
dc.date.accessioned | 2018-07-04T15:49:16Z | |
dc.date.available | 2012-10-20T05:23:23Z | |
dc.date.available | 2018-07-04T15:49:16Z | |
dc.date.created | 2012-10-20T05:23:23Z | |
dc.date.issued | 2009 | |
dc.identifier | JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.629, n.1/Fev, p.158-163, 2009 | |
dc.identifier | 1572-6657 | |
dc.identifier | http://producao.usp.br/handle/BDPI/31204 | |
dc.identifier | 10.1016/j.jelechem.2009.02.010 | |
dc.identifier | http://dx.doi.org/10.1016/j.jelechem.2009.02.010 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1627842 | |
dc.description.abstract | Carbon dioxide electroreduction on copper electrode was studied by surface enhanced Raman scattering (SERS) in K(2)SO(4) aqueous solutions with different pH values. CO(2) was bubbled into the solution at 0 V vs. Ag/AgCl, i.e., on an oxidized copper surface. In acidic solutions (pH around 2.5), at -0.2 V, bands indicative of the presence of ethylene on the electrode surface were detected. Although ethylene is knowledgably a product of CO(2) electroreduction on copper, it was not experimentally identified on the electrode`s surface at such a low cathodic potential in prior works. In solutions with pH around 2.5, CO bands were not observed, suggesting that hydrocarbons could be formed by a pathway that does not occur via adsorbed CO. In solutions with higher pHs, a complex spectral pattern, between 800 and 1700 cm(-1), was observed at approximately -0.4 V. The observed spectrum closely resembles those reported in the literature for adsorption of monocarboxylic acids with small chains. The spectral features indicate the presence of a structure containing a double C=C bond. a carboxyl group, and C-H bonds on the electrode`s surface. SERS spectra obtained in CO-saturated solution are also presented. However, in this case, no SERS bands were observed in the region between 800 and 1700 cm(-1) at low cathodic potentials. (c) 2009 Elsevier B.V. All rights reserved. | |
dc.language | eng | |
dc.publisher | ELSEVIER SCIENCE SA | |
dc.relation | Journal of Electroanalytical Chemistry | |
dc.rights | Copyright ELSEVIER SCIENCE SA | |
dc.rights | restrictedAccess | |
dc.subject | Spectroelectrochemistry | |
dc.subject | Electrocatalysis | |
dc.subject | Carbon dioxide | |
dc.subject | SERS | |
dc.subject | Anomalous SERS | |
dc.title | Spectroscopic evidences of the presence of hydrogenated species on the surface of copper during CO(2) electroreduction at low cathodic potentials | |
dc.type | Artículos de revistas | |