Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates

EMIRS spectra of the surface species resulting from methanol electrosorption on electrodispersed Pt were obtained by working under a wide range of experimental conditions, i.e. electrode roughness factor, methanol concentration and mean modulation potential. The intensity of the absorption band rela...

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Detalles Bibliográficos
Autores principales: Beden, Bernard, Hahn, François, Léger, Jean Marc, Lamy, Claude, Perdriel, Carlos L., Tacconi, Norma R. de, Lezna, Reynaldo Oscar, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1991
Materias:
Ciencias Exactas
Química
electromodulated infrared spectroscopy
Metanol
electrooxidation
Platino (Metal)
Electrodos
electrodispersed electrodes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82913
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82913
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
electromodulated infrared spectroscopy
Metanol
electrooxidation
Platino (Metal)
Electrodos
electrodispersed electrodes
spellingShingle Ciencias Exactas
Química
electromodulated infrared spectroscopy
Metanol
electrooxidation
Platino (Metal)
Electrodos
electrodispersed electrodes
Beden, Bernard
Hahn, François
Léger, Jean Marc
Lamy, Claude
Perdriel, Carlos L.
Tacconi, Norma R. de
Lezna, Reynaldo Oscar
Arvia, Alejandro Jorge
Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates
topic_facet Ciencias Exactas
Química
electromodulated infrared spectroscopy
Metanol
electrooxidation
Platino (Metal)
Electrodos
electrodispersed electrodes
description EMIRS spectra of the surface species resulting from methanol electrosorption on electrodispersed Pt were obtained by working under a wide range of experimental conditions, i.e. electrode roughness factor, methanol concentration and mean modulation potential. The intensity of the absorption band related to linearly adsorbed CO-species, CO<sub>L</sub>, at ca. 2030–2080 cm<sup>−1</sup> decreases on increasing the electrode roughness factor, a fact which is interpreted as a decrease in the CO adsorbate poisoning effect on electrodispersed Pt surfaces. As a consequence, under well-defined conditions, several bands are observed which might be assigned to adsorbed intermediates and reactive species. EMIRS also reveals a competition between CO<sub>B</sub> and CO<sub>L</sub> at high surface coverages. Spectral data for methanol electrooxidation on electrodispersed electrodes correlate well with the expected structure of this type of electrode.
format Articulo
Articulo
author Beden, Bernard
Hahn, François
Léger, Jean Marc
Lamy, Claude
Perdriel, Carlos L.
Tacconi, Norma R. de
Lezna, Reynaldo Oscar
Arvia, Alejandro Jorge
author_facet Beden, Bernard
Hahn, François
Léger, Jean Marc
Lamy, Claude
Perdriel, Carlos L.
Tacconi, Norma R. de
Lezna, Reynaldo Oscar
Arvia, Alejandro Jorge
author_sort Beden, Bernard
title Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates
title_short Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates
title_full Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates
title_fullStr Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates
title_full_unstemmed Electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: Enhancement of reactive intermediates
title_sort electromodulated infrared spectroscopy of methanol electrooxidation on electrodispersed platinum electrodes: enhancement of reactive intermediates
publishDate 1991
url http://sedici.unlp.edu.ar/handle/10915/82913
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