Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions

The electrooxidation of “reduced CO<sub>2</sub>” electroadsorbates on electrodispersed platinum electrodes has been investigated in 0.05 M HClO<sub>4</sub>, 1 M HClO4, 0.5 M H<sub>2</sub>SO<sub>4</sub> and 1 M H<sub>3</sub>PO<sub>4<...

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Authors: Marcos, M. L., González Velasco, J., Vara, J. M., Giordano, M. C., Arvia, Alejandro Jorge
Format: article
Status:Published version
Publication Date:1989
Country:Argentina
Institution:Universidad Nacional de La Plata
Repository:SEDICI (UNLP)
Language:English
OAI Identifier:oai:sedici.unlp.edu.ar:10915/121661
Online Access:http://sedici.unlp.edu.ar/handle/10915/121661
Access Level:Open access
Keyword:Ciencias Exactas
Química
Electrooxidation
CO2
Kinetics
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spelling Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutionsMarcos, M. L.González Velasco, J.Vara, J. M.Giordano, M. C.Arvia, Alejandro JorgeCiencias ExactasQuímicaElectrooxidationCO2KineticsThe electrooxidation of “reduced CO<sub>2</sub>” electroadsorbates on electrodispersed platinum electrodes has been investigated in 0.05 M HClO<sub>4</sub>, 1 M HClO4, 0.5 M H<sub>2</sub>SO<sub>4</sub> and 1 M H<sub>3</sub>PO<sub>4</sub> at 25° C through voltammetry and potential step techniques. The overall reaction comprises three distinguishable processes, namely a first order triggering process, and two second order surface processes. The latter are influenced remarkably by the solution composition (anions). The second order reaction mechanism involves two distinguishable “ reduced CO<sub>2</sub>” electroadsorbates which react independently with the OH species formed from H<sub>2</sub>O electrooxidation on the bare platinum sites as the reaction proceeds. An interaction term has to be included in the rate equations to account for the experimental results. The mechanistic interpretation accounts for the values of the number of electrons per site ranging from 1 to 2.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1989info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf205-224http://sedici.unlp.edu.ar/handle/10915/121661enginfo:eu-repo/semantics/altIdentifier/issn/0022-0728info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(89)85037-5info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:07:01Zoai:sedici.unlp.edu.ar:10915/121661Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:07:02.024SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
title Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
spellingShingle Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
Marcos, M. L.
Ciencias Exactas
Química
Electrooxidation
CO2
Kinetics
title_short Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
title_full Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
title_fullStr Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
title_full_unstemmed Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
title_sort Kinetics and mechanism of “reduced CO<sub>2</sub>” electrooxidation on electrodispersed platinum in different acid solutions
dc.creator.none.fl_str_mv Marcos, M. L.
González Velasco, J.
Vara, J. M.
Giordano, M. C.
Arvia, Alejandro Jorge
author Marcos, M. L.
author_facet Marcos, M. L.
González Velasco, J.
Vara, J. M.
Giordano, M. C.
Arvia, Alejandro Jorge
author_role author
author2 González Velasco, J.
Vara, J. M.
Giordano, M. C.
Arvia, Alejandro Jorge
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Electrooxidation
CO2
Kinetics
topic Ciencias Exactas
Química
Electrooxidation
CO2
Kinetics
description The electrooxidation of “reduced CO<sub>2</sub>” electroadsorbates on electrodispersed platinum electrodes has been investigated in 0.05 M HClO<sub>4</sub>, 1 M HClO4, 0.5 M H<sub>2</sub>SO<sub>4</sub> and 1 M H<sub>3</sub>PO<sub>4</sub> at 25° C through voltammetry and potential step techniques. The overall reaction comprises three distinguishable processes, namely a first order triggering process, and two second order surface processes. The latter are influenced remarkably by the solution composition (anions). The second order reaction mechanism involves two distinguishable “ reduced CO<sub>2</sub>” electroadsorbates which react independently with the OH species formed from H<sub>2</sub>O electrooxidation on the bare platinum sites as the reaction proceeds. An interaction term has to be included in the rate equations to account for the experimental results. The mechanistic interpretation accounts for the values of the number of electrons per site ranging from 1 to 2.
publishDate 1989
dc.date.none.fl_str_mv 1989
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/10915/121661
url http://sedici.unlp.edu.ar/handle/10915/121661
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0022-0728
info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(89)85037-5
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
205-224
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (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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