Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation

The oxygen electroreduction reaction has been studied at both preferred oriented and conventional polycrystalline platinum rotating disc electrodes in x m KOH (0.05 ⩽ x ⩽ 3.0) aqueous solutions under oxygen saturation at 25°C. At low current densities, Tafel lines with slope -0.060 V decade⁻¹ have b...

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Autores principales:	Zinola Sánchez, Carlos Fernando, Castro Luna Berenguer, Ana María del Carmen, Triaca, Walter Enrique, Arvia, Alejandro Jorge
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1994
Materias:	Química Platinum Electrode Oriented Surface Rotate Disc Electrode Prefer Crystallographic Orientation Oxygen Electroreduction
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/146265
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-146265
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Química Platinum Electrode Oriented Surface Rotate Disc Electrode Prefer Crystallographic Orientation Oxygen Electroreduction
spellingShingle	Química Platinum Electrode Oriented Surface Rotate Disc Electrode Prefer Crystallographic Orientation Oxygen Electroreduction Zinola Sánchez, Carlos Fernando Castro Luna Berenguer, Ana María del Carmen Triaca, Walter Enrique Arvia, Alejandro Jorge Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
topic_facet	Química Platinum Electrode Oriented Surface Rotate Disc Electrode Prefer Crystallographic Orientation Oxygen Electroreduction
description	The oxygen electroreduction reaction has been studied at both preferred oriented and conventional polycrystalline platinum rotating disc electrodes in x m KOH (0.05 ⩽ x ⩽ 3.0) aqueous solutions under oxygen saturation at 25°C. At low current densities, Tafel lines with slope -0.060 V decade⁻¹ have been obtained at all platinum electrodes. At high current densities, higher Tafel slopes ranging from -0.18 to -0.40 V decade⁻¹ have been observed, depending on the type of preferred oriented Pt and KOH concentration. Rotating ring-disc electrode data have shown that a higher amount of H₂O₂ is produced on one type of preferred oriented surface at all KOH concentrations. A complex reaction scheme has been used to evaluate the electrochemical rate constants of the reaction steps at three platinum electrodes.
format	Articulo Articulo
author	Zinola Sánchez, Carlos Fernando Castro Luna Berenguer, Ana María del Carmen Triaca, Walter Enrique Arvia, Alejandro Jorge
author_facet	Zinola Sánchez, Carlos Fernando Castro Luna Berenguer, Ana María del Carmen Triaca, Walter Enrique Arvia, Alejandro Jorge
author_sort	Zinola Sánchez, Carlos Fernando
title	Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_short	Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_full	Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_fullStr	Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_full_unstemmed	Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_sort	kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in koh: influence of preferred crystallographic orientation
publishDate	1994
url	http://sedici.unlp.edu.ar/handle/10915/146265
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bdutipo_str	Repositorios
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Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation

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