Gold and silver anchored cobalt porphyrins used for catalytic water splitting
- Autores
- Morales Vasquez, Miguel Angel; Suarez, Sebastian; Doctorovich, Fabio
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In natural photosynthesis, the energy in sunlight is used to rearrange the bonds present in water to produce oxygen and hydrogen. Artificial systems that perform water splitting require catalysts that assist the production of hydrogen from water without excessive reduction potential. Consequently a cobalt porphyrin({cobaltII-5,10,15,20-tetrakis[3-(p-acetylthiopropoxy) phenyl]porphyrin}[Co-P]) covalently bound to gold or silver has been tested as a catalyst for reduction and oxidation of H2O to H2 and O2, respectively. In the cyclic voltammogram CoIII/CoII and CoII/CoI reversible waves were observed at potentials close to the expected values. The addition of water increased the cathodic peak for the CoII/CoI wave, consistent with the electrocatalytic reduction of water. In aqueous buffers the current increased for catalytic [Co-P] with decreasing pH. Similar results are obtained by changing the solvent or metal electrode to which the porphyrin is adsorbed. This leads to a reduction in the redox potential for the H+/H2 couple by 200 mV. The material (Au°-[Co-P]) shows good efficiency and robustness for the electrochemical production of H2 in different solvents and buffers in contrast to results previously seen for other porphyrins in solutions. The modified electrode Au°-[Co-P] shows high stability, and it is not damaged after several cycles. It can be stored in a CH2Cl2 solution and reused several times.
Fil: Morales Vasquez, Miguel Angel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Suarez, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Doctorovich, Fabio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina - Materia
-
ELECTROCHEMICAL PROPERTIES
ELECTROCHEMICAL TECHNIQUES
INORGANIC COMPOUNDS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/38406
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Gold and silver anchored cobalt porphyrins used for catalytic water splittingMorales Vasquez, Miguel AngelSuarez, SebastianDoctorovich, FabioELECTROCHEMICAL PROPERTIESELECTROCHEMICAL TECHNIQUESINORGANIC COMPOUNDShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In natural photosynthesis, the energy in sunlight is used to rearrange the bonds present in water to produce oxygen and hydrogen. Artificial systems that perform water splitting require catalysts that assist the production of hydrogen from water without excessive reduction potential. Consequently a cobalt porphyrin({cobaltII-5,10,15,20-tetrakis[3-(p-acetylthiopropoxy) phenyl]porphyrin}[Co-P]) covalently bound to gold or silver has been tested as a catalyst for reduction and oxidation of H2O to H2 and O2, respectively. In the cyclic voltammogram CoIII/CoII and CoII/CoI reversible waves were observed at potentials close to the expected values. The addition of water increased the cathodic peak for the CoII/CoI wave, consistent with the electrocatalytic reduction of water. In aqueous buffers the current increased for catalytic [Co-P] with decreasing pH. Similar results are obtained by changing the solvent or metal electrode to which the porphyrin is adsorbed. This leads to a reduction in the redox potential for the H+/H2 couple by 200 mV. The material (Au°-[Co-P]) shows good efficiency and robustness for the electrochemical production of H2 in different solvents and buffers in contrast to results previously seen for other porphyrins in solutions. The modified electrode Au°-[Co-P] shows high stability, and it is not damaged after several cycles. It can be stored in a CH2Cl2 solution and reused several times.Fil: Morales Vasquez, Miguel Angel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Suarez, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; ArgentinaFil: Doctorovich, Fabio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaElsevier Science Sa2015-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/38406Morales Vasquez, Miguel Angel; Suarez, Sebastian; Doctorovich, Fabio; Gold and silver anchored cobalt porphyrins used for catalytic water splitting; Elsevier Science Sa; Materials Chemistry and Physics; 159; 6-2015; 159-1660254-0584CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058415002357info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2015.03.065info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:31:35Zoai:ri.conicet.gov.ar:11336/38406instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:31:35.637CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
title |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
spellingShingle |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting Morales Vasquez, Miguel Angel ELECTROCHEMICAL PROPERTIES ELECTROCHEMICAL TECHNIQUES INORGANIC COMPOUNDS |
title_short |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
title_full |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
title_fullStr |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
title_full_unstemmed |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
title_sort |
Gold and silver anchored cobalt porphyrins used for catalytic water splitting |
dc.creator.none.fl_str_mv |
Morales Vasquez, Miguel Angel Suarez, Sebastian Doctorovich, Fabio |
author |
Morales Vasquez, Miguel Angel |
author_facet |
Morales Vasquez, Miguel Angel Suarez, Sebastian Doctorovich, Fabio |
author_role |
author |
author2 |
Suarez, Sebastian Doctorovich, Fabio |
author2_role |
author author |
dc.subject.none.fl_str_mv |
ELECTROCHEMICAL PROPERTIES ELECTROCHEMICAL TECHNIQUES INORGANIC COMPOUNDS |
topic |
ELECTROCHEMICAL PROPERTIES ELECTROCHEMICAL TECHNIQUES INORGANIC COMPOUNDS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
In natural photosynthesis, the energy in sunlight is used to rearrange the bonds present in water to produce oxygen and hydrogen. Artificial systems that perform water splitting require catalysts that assist the production of hydrogen from water without excessive reduction potential. Consequently a cobalt porphyrin({cobaltII-5,10,15,20-tetrakis[3-(p-acetylthiopropoxy) phenyl]porphyrin}[Co-P]) covalently bound to gold or silver has been tested as a catalyst for reduction and oxidation of H2O to H2 and O2, respectively. In the cyclic voltammogram CoIII/CoII and CoII/CoI reversible waves were observed at potentials close to the expected values. The addition of water increased the cathodic peak for the CoII/CoI wave, consistent with the electrocatalytic reduction of water. In aqueous buffers the current increased for catalytic [Co-P] with decreasing pH. Similar results are obtained by changing the solvent or metal electrode to which the porphyrin is adsorbed. This leads to a reduction in the redox potential for the H+/H2 couple by 200 mV. The material (Au°-[Co-P]) shows good efficiency and robustness for the electrochemical production of H2 in different solvents and buffers in contrast to results previously seen for other porphyrins in solutions. The modified electrode Au°-[Co-P] shows high stability, and it is not damaged after several cycles. It can be stored in a CH2Cl2 solution and reused several times. Fil: Morales Vasquez, Miguel Angel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Suarez, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina Fil: Doctorovich, Fabio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina |
description |
In natural photosynthesis, the energy in sunlight is used to rearrange the bonds present in water to produce oxygen and hydrogen. Artificial systems that perform water splitting require catalysts that assist the production of hydrogen from water without excessive reduction potential. Consequently a cobalt porphyrin({cobaltII-5,10,15,20-tetrakis[3-(p-acetylthiopropoxy) phenyl]porphyrin}[Co-P]) covalently bound to gold or silver has been tested as a catalyst for reduction and oxidation of H2O to H2 and O2, respectively. In the cyclic voltammogram CoIII/CoII and CoII/CoI reversible waves were observed at potentials close to the expected values. The addition of water increased the cathodic peak for the CoII/CoI wave, consistent with the electrocatalytic reduction of water. In aqueous buffers the current increased for catalytic [Co-P] with decreasing pH. Similar results are obtained by changing the solvent or metal electrode to which the porphyrin is adsorbed. This leads to a reduction in the redox potential for the H+/H2 couple by 200 mV. The material (Au°-[Co-P]) shows good efficiency and robustness for the electrochemical production of H2 in different solvents and buffers in contrast to results previously seen for other porphyrins in solutions. The modified electrode Au°-[Co-P] shows high stability, and it is not damaged after several cycles. It can be stored in a CH2Cl2 solution and reused several times. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-06 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 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://hdl.handle.net/11336/38406 Morales Vasquez, Miguel Angel; Suarez, Sebastian; Doctorovich, Fabio; Gold and silver anchored cobalt porphyrins used for catalytic water splitting; Elsevier Science Sa; Materials Chemistry and Physics; 159; 6-2015; 159-166 0254-0584 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/38406 |
identifier_str_mv |
Morales Vasquez, Miguel Angel; Suarez, Sebastian; Doctorovich, Fabio; Gold and silver anchored cobalt porphyrins used for catalytic water splitting; Elsevier Science Sa; Materials Chemistry and Physics; 159; 6-2015; 159-166 0254-0584 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058415002357 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2015.03.065 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science Sa |
publisher.none.fl_str_mv |
Elsevier Science Sa |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844614326844915712 |
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13.070432 |