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Título: | Stability and catalytic properties of nanostructured carbons in electrochemical environments |
Autor: | Pérez Rodríguez, Sara CSIC ORCID; Sebastián del Río, David CSIC ORCID ; Lázaro Elorri, María Jesús CSIC ORCID ; Pastor Tejera, Elena | Palabras clave: | Nanostructured carbons DEMS Corrosion O2 evolution H2 evolution CO2 electroreduction |
Fecha de publicación: | 13-oct-2017 | Editor: | Elsevier | Citación: | Journal of Catalysis 355: 156-166 (2017) | Resumen: | This work reports a study of the electrocatalytic properties and stability of nanostructured carbon electrodes by on-line differential electrochemical mass spectrometry (DEMS). A wide electrochemical characterization in 0.1 M NaHCO3 involving anodic (carbon corrosion and oxygen evolution reaction, OER) and cathodic (CO2 reduction and hydrogen evolution reaction, HER) key reactions in energy-conversion devices was performed. DEMS studies showed that the faradaic current from 1.3 to 1.6 V vs. RHE of carbons was only associated to CO2 formation by corrosion and not to OER, the stability being improved by the graphitic character of carbon. H2 evolution was also enhanced with graphitic carbon nanofilaments, even though metal traces might positively influence their catalytic activity. By comparison of the faradaic currents and the H2 formation signals, in the absence and presence of CO2, a high inhibition of the HER was established for all carbon electrodes due to the species adsorption from CO2 reduction. | Descripción: | 9 Figuras. 4 Tablas. Datos suplementarios pueden encontrarse en la versión en línea del editor. | Versión del editor: | http://dx.doi.org/10.1016/j.jcat.2017.09.019 | URI: | http://hdl.handle.net/10261/173374 | DOI: | 10.1016/j.jcat.2017.09.019 | ISSN: | 0021-9517 |
Aparece en las colecciones: | (ICB) Artículos |
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Perez_2017-JC.pdf | Preprint artículo | 2,54 MB | Adobe PDF | Visualizar/Abrir |
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