Effect of surface structure of platinum single crystal electrodes on the electrochemical reduction of CO2 in methanol-water mixtures
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http://hdl.handle.net/10045/68995
Títol: | Effect of surface structure of platinum single crystal electrodes on the electrochemical reduction of CO2 in methanol-water mixtures |
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Autors: | Cardenas, Betzhy | Climent, Victor | Feliu, Juan M. |
Grups d'investigació o GITE: | Electroquímica de Superficies |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Paraules clau: | CO2 reduction | Platinum single crystal electrode | Methanol water mixtures | Cyclic voltammetry | Hanging meniscus rotating disk electrode | FTIRRAS spectroscopy |
Àrees de coneixement: | Química Física |
Data de publicació: | 15-de maig-2017 |
Editor: | Elsevier |
Citació bibliogràfica: | Journal of Electroanalytical Chemistry. 2017, 793: 157-163. doi:10.1016/j.jelechem.2016.12.047 |
Resum: | The reduction of CO2 on platinum single crystal electrodes has been investigated in methanol/water mixtures. The reaction is sensitive to the crystallographic structure of the surface, with the (111) triangular arrangement of atoms being the most active site. Use of stepped surfaces revealed that long range order has little effect on the reaction rate. On the other hand, the (100) site is the less active. The combination of the results of a voltammetric study using different scan rate and the use of a hanging meniscus rotating disk electrode configuration with different rotation speeds suggests the reaction rate is limited by a chemical step at large overvoltages. The nature of this chemical step is uncertain but different possibilities are discussed. The Tafel slope suggests that the rate determining step is the first electron transfer at low overvoltages while at high overvoltages the rate of the first chemical step limits the rate of CO2 reduction. |
Patrocinadors: | Financial support from MINECTO through projects CTQ2013-44083-P and PCIN-2013-046 is greatly acknowledged. B. Cardenas also acknowledges the Generalitat Valenciana for the award of a Santiago Grisolia Grant. |
URI: | http://hdl.handle.net/10045/68995 |
ISSN: | 1572-6657 (Print) | 1873-2569 (Online) |
DOI: | 10.1016/j.jelechem.2016.12.047 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2016 Elsevier B.V. |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1016/j.jelechem.2016.12.047 |
Apareix a la col·lecció: | INV - EQSUP - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2017_Cardenas_etal_JElectrChem_final.pdf | Versión final (acceso restringido) | 1,15 MB | Adobe PDF | Obrir Sol·licitar una còpia |
2017_Cardenas_etal_JElectrChem_revised.pdf | Versión revisada (acceso abierto) | 1,57 MB | Adobe PDF | Obrir Vista prèvia |
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