Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS

Autores
Pastor Tejera, Elena; González, Sergio G.; Arvia, Alejandro Jorge
Año de publicación
1995
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The reactivity of isopropanol on polycrystalline Pt in acid solutions was investigated using in-situ Fourier transform IR spectroscopy (FTIRS) and on-line differential electrochemical mass spectrometry (DEMS). The electro-oxidation products are acetone and CO2; the former is observed when isopropanol is present in the bulk of the solution, and the latter is produced from strongly adsorbed species. Both bulk and adsorbed isopropanol electro-reduction yield propane. H-D exchange is observed during propane formation when the reaction takes place in a D2O + DCIO4 solution. This observation suggests the formation of adsorbates bonded to the surface through the C ∝ atom of the isopropanol molecule. FTIR spectra of adsorbed species show the presence of -CH3 and -COH groups. The most probable adsorbate structures are (CH3-C-CH3)Pt, (CH3-CH-CH3)Pt and (CH3-COH-CH3)Pt, presumably accompanied by (CH3-CO-CH3)Pt.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Química
isopropanol
polycrystalline
Platino (Metal)
Espectroscopía Infrarroja por Transformada de Fourier
electro-oxidation
Electroquímica
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85994
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/85994
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRSPastor Tejera, ElenaGonzález, Sergio G.Arvia, Alejandro JorgeCiencias ExactasQuímicaisopropanolpolycrystallinePlatino (Metal)Espectroscopía Infrarroja por Transformada de Fourierelectro-oxidationElectroquímicaThe reactivity of isopropanol on polycrystalline Pt in acid solutions was investigated using in-situ Fourier transform IR spectroscopy (FTIRS) and on-line differential electrochemical mass spectrometry (DEMS). The electro-oxidation products are acetone and CO<sub>2</sub>; the former is observed when isopropanol is present in the bulk of the solution, and the latter is produced from strongly adsorbed species. Both bulk and adsorbed isopropanol electro-reduction yield propane. H-D exchange is observed during propane formation when the reaction takes place in a D<sub>2</sub>O + DCIO<sub>4</sub> solution. This observation suggests the formation of adsorbates bonded to the surface through the C ∝ atom of the isopropanol molecule. FTIR spectra of adsorbed species show the presence of -CH<sub>3</sub> and -COH groups. The most probable adsorbate structures are (CH<sub>3</sub>-C-CH<sub>3</sub>)Pt, (CH<sub>3</sub>-CH-CH<sub>3</sub>)Pt and (CH<sub>3</sub>-COH-CH<sub>3</sub>)Pt, presumably accompanied by (CH<sub>3</sub>-CO-CH<sub>3</sub>)Pt.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1995-10-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf233-242http://sedici.unlp.edu.ar/handle/10915/85994enginfo:eu-repo/semantics/altIdentifier/issn/1572-6657info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(95)04129-Cinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:57:52Zoai:sedici.unlp.edu.ar:10915/85994Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:57:53.112SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
title Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
spellingShingle Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
Pastor Tejera, Elena
Ciencias Exactas
Química
isopropanol
polycrystalline
Platino (Metal)
Espectroscopía Infrarroja por Transformada de Fourier
electro-oxidation
Electroquímica
title_short Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
title_full Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
title_fullStr Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
title_full_unstemmed Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
title_sort Electroreactivity of isopropanol on platinum in acids studied by DEMS and FTIRS
dc.creator.none.fl_str_mv Pastor Tejera, Elena
González, Sergio G.
Arvia, Alejandro Jorge
author Pastor Tejera, Elena
author_facet Pastor Tejera, Elena
González, Sergio G.
Arvia, Alejandro Jorge
author_role author
author2 González, Sergio G.
Arvia, Alejandro Jorge
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
isopropanol
polycrystalline
Platino (Metal)
Espectroscopía Infrarroja por Transformada de Fourier
electro-oxidation
Electroquímica
topic Ciencias Exactas
Química
isopropanol
polycrystalline
Platino (Metal)
Espectroscopía Infrarroja por Transformada de Fourier
electro-oxidation
Electroquímica
dc.description.none.fl_txt_mv The reactivity of isopropanol on polycrystalline Pt in acid solutions was investigated using in-situ Fourier transform IR spectroscopy (FTIRS) and on-line differential electrochemical mass spectrometry (DEMS). The electro-oxidation products are acetone and CO<sub>2</sub>; the former is observed when isopropanol is present in the bulk of the solution, and the latter is produced from strongly adsorbed species. Both bulk and adsorbed isopropanol electro-reduction yield propane. H-D exchange is observed during propane formation when the reaction takes place in a D<sub>2</sub>O + DCIO<sub>4</sub> solution. This observation suggests the formation of adsorbates bonded to the surface through the C ∝ atom of the isopropanol molecule. FTIR spectra of adsorbed species show the presence of -CH<sub>3</sub> and -COH groups. The most probable adsorbate structures are (CH<sub>3</sub>-C-CH<sub>3</sub>)Pt, (CH<sub>3</sub>-CH-CH<sub>3</sub>)Pt and (CH<sub>3</sub>-COH-CH<sub>3</sub>)Pt, presumably accompanied by (CH<sub>3</sub>-CO-CH<sub>3</sub>)Pt.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
description The reactivity of isopropanol on polycrystalline Pt in acid solutions was investigated using in-situ Fourier transform IR spectroscopy (FTIRS) and on-line differential electrochemical mass spectrometry (DEMS). The electro-oxidation products are acetone and CO<sub>2</sub>; the former is observed when isopropanol is present in the bulk of the solution, and the latter is produced from strongly adsorbed species. Both bulk and adsorbed isopropanol electro-reduction yield propane. H-D exchange is observed during propane formation when the reaction takes place in a D<sub>2</sub>O + DCIO<sub>4</sub> solution. This observation suggests the formation of adsorbates bonded to the surface through the C ∝ atom of the isopropanol molecule. FTIR spectra of adsorbed species show the presence of -CH<sub>3</sub> and -COH groups. The most probable adsorbate structures are (CH<sub>3</sub>-C-CH<sub>3</sub>)Pt, (CH<sub>3</sub>-CH-CH<sub>3</sub>)Pt and (CH<sub>3</sub>-COH-CH<sub>3</sub>)Pt, presumably accompanied by (CH<sub>3</sub>-CO-CH<sub>3</sub>)Pt.
publishDate 1995
dc.date.none.fl_str_mv 1995-10-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/85994
url http://sedici.unlp.edu.ar/handle/10915/85994
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1572-6657
info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(95)04129-C
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
233-242
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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