Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes

The oxygen electroreduction reaction (OERR) kinetics at (111)- and (100)-type Pt electrodes has been studied in aqueous 1.0 M H<sub>2</sub>SO<sub>4</sub> solutions in the 8–62°C range. On both Pt electrodes and at all temperatures, two Tafel regions have been observed. The Ta...

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Detalles Bibliográficos
Autores principales:	Zinola Sánchez, Carlos Fernando, Castro Luna Berenguer, Ana María del Carmen, Arvia, Alejandro Jorge
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1994
Materias:	Ciencias Exactas Química oxygen electroreduction platinum temperature kinetics parameters
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/127474 https://www.sciencedirect.com/science/article/abs/pii/0013468694850739
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-127474
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 oxygen electroreduction platinum temperature kinetics parameters
spellingShingle	Ciencias Exactas Química oxygen electroreduction platinum temperature kinetics parameters Zinola Sánchez, Carlos Fernando Castro Luna Berenguer, Ana María del Carmen Arvia, Alejandro Jorge Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
topic_facet	Ciencias Exactas Química oxygen electroreduction platinum temperature kinetics parameters
description	The oxygen electroreduction reaction (OERR) kinetics at (111)- and (100)-type Pt electrodes has been studied in aqueous 1.0 M H<sub>2</sub>SO<sub>4</sub> solutions in the 8–62°C range. On both Pt electrodes and at all temperatures, two Tafel regions have been observed. The Tafel slope in the low current density range is −0.053 ± 0.005 V decade<sup>−1</sup>, irrespective of temperature and the surface texture of the electrode. For (111)-type Pt, the Tafel slope in the high current density range increases with temperature, approaching the −2.303(2RT/F) ratio, whereas for (100)-type Pt, it reaches a temperature-independent value equal to −0.165 ± 0.003 V decade<sup>−1</sup>. Temperature dependences of OERR Tafel slopes on both types of Pt electrodes offer the possibility of further insights into the mechanism of the reaction, through the interpretation of both the adsorption enthalpy and entropy of intermediates produced along the OERR. Compensation effects, involving activation enthalpy and entropy variations with the applied potential, are also considered to account for experimental data.
format	Articulo Articulo
author	Zinola Sánchez, Carlos Fernando Castro Luna Berenguer, Ana María del Carmen Arvia, Alejandro Jorge
author_facet	Zinola Sánchez, Carlos Fernando Castro Luna Berenguer, Ana María del Carmen Arvia, Alejandro Jorge
author_sort	Zinola Sánchez, Carlos Fernando
title	Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_short	Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_full	Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_fullStr	Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_full_unstemmed	Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_sort	temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
publishDate	1994
url	http://sedici.unlp.edu.ar/handle/10915/127474 https://www.sciencedirect.com/science/article/abs/pii/0013468694850739
work_keys_str_mv	AT zinolasanchezcarlosfernando temperaturedependenceofkineticparametersrelatedtooxygenelectroreductioninacidsolutionsonplatinumelectrodes AT castrolunaberengueranamariadelcarmen temperaturedependenceofkineticparametersrelatedtooxygenelectroreductioninacidsolutionsonplatinumelectrodes AT arviaalejandrojorge temperaturedependenceofkineticparametersrelatedtooxygenelectroreductioninacidsolutionsonplatinumelectrodes
bdutipo_str	Repositorios
_version_	1764820451741138948

Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes

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