Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution

The oxygen electroreduction reaction was studied on two different preferentially oriented ((111)-type and (100)-type and on a conventional polycrystalline (PC) platinum rotating disc electrodes in acid solutions at 30 °C. At low overpotentials, Tafel lines of −0.060 V decade−1 were obtained on the t...

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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:
Física
Química
oxygen electroreduction
conventional polycrystalline
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134066
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134066
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Química
oxygen electroreduction
conventional polycrystalline
spellingShingle Física
Química
oxygen electroreduction
conventional polycrystalline
Zinola Sánchez, Carlos Fernando
Castro Luna Berenguer, Ana María del Carmen
Triaca, Walter Enrique
Arvia, Alejandro Jorge
Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
topic_facet Física
Química
oxygen electroreduction
conventional polycrystalline
description The oxygen electroreduction reaction was studied on two different preferentially oriented ((111)-type and (100)-type and on a conventional polycrystalline (PC) platinum rotating disc electrodes in acid solutions at 30 °C. At low overpotentials, Tafel lines of −0.060 V decade−1 were obtained on the three electrodes in oxygen-saturated 1.0m H2SO4 and 1.0m H2SO4 + y; m K2SO4 (0 ⩽y ⩽ 1). At high over-potentials the usual Tafel slope of -0.120V decade−1 was observed on both (111)-type and PC platinum electrodes in 1.0m H2SO4, whereas a slope of −0.165V decade−1 was found on (100)-type platinum. In oxygen-saturated 1.0m H2SO4 the surface coverage by O-containing adsorbates on (100)-type platinum was greater than on both (111)-type and PC platinum. Rotating ring-disc electrode data showed that a higher amount of H2O2 was produced on (100)-type platinum than on the other platinum surfaces. The overpotential against current density plots are influenced by the anion concentration depending on the type of preferentially oriented platinum.
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 Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
title_short Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
title_full Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
title_fullStr Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
title_full_unstemmed Electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
title_sort electroreduction of molecular oxygen on preferentially oriented platinum electrodes in acid solution
publishDate 1994
url http://sedici.unlp.edu.ar/handle/10915/134066
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AT castrolunaberengueranamariadelcarmen electroreductionofmolecularoxygenonpreferentiallyorientedplatinumelectrodesinacidsolution
AT triacawalterenrique electroreductionofmolecularoxygenonpreferentiallyorientedplatinumelectrodesinacidsolution
AT arviaalejandrojorge electroreductionofmolecularoxygenonpreferentiallyorientedplatinumelectrodesinacidsolution
bdutipo_str Repositorios
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