Kinetics of formic acid dehydration on Pt electrodes by time-resolved ATR-SEIRAS
Empreu sempre aquest identificador per citar o enllaçar aquest ítem
http://hdl.handle.net/10045/132162
Títol: | Kinetics of formic acid dehydration on Pt electrodes by time-resolved ATR-SEIRAS |
---|---|
Autors: | Pérez-Martínez, Laura | Herrero, Enrique | Cuesta, Angel |
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: | Formic acid dehydration | Adsorbed CO | ATR-SEIRAS | Electrocatalysis |
Data de publicació: | 9-de febrer-2023 |
Editor: | AIP Publishing |
Citació bibliogràfica: | The Journal of Chemical Physics. 2023, 158: 094705. https://doi.org/10.1063/5.0138791 |
Resum: | The potential dependence of the rate of dehydration of formic acid to adsorbed CO (COad) on Pt at pH 1 has been studied on a polycrystalline Pt surface by time-resolved surface-enhanced infrared absorption spectroscopy in the attenuated total reflection mode (ATR-SEIRAS) with simultaneous recording of current transients after a potential step. A range of formic acid concentrations has been used to obtain a deeper insight into the mechanism of the reaction. Our experiments have allowed us to confirm that the potential dependence of the rate of dehydration has a bell shape, going through a maximum around the potential of zero total charge (pztc) of the most active site. The analysis of the integrated intensity and frequency of the bands corresponding to COL and COB/M shows a progressive population of the active sites on the surface. The observed potential dependence of the rate of formation of COad is consistent with a mechanism in which the reversible electroadsorption of HCOOad is followed by its rate-determining reduction to COad. |
Patrocinadors: | L.P.-M. acknowledges a doctoral scholarship within the Leverhulme Centre for Doctoral Training in Sustainable Production of Chemicals and Materials (Grant DS-2017-073). |
URI: | http://hdl.handle.net/10045/132162 |
ISSN: | 0021-9606 (Print) | 1089-7690 (Online) |
DOI: | 10.1063/5.0138791 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.1063/5.0138791 |
Apareix a la col·lecció: | INV - EQSUP - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
---|---|---|---|---|
Perez-Martinez_etal_2023_JChemPhys.pdf | 5,75 MB | Adobe PDF | Obrir Vista prèvia | |
Aquest ítem està subjecte a una llicència de Creative Commons Llicència Creative Commons