Methanol tolerant electrocatalysts for the oxygen reduction reaction

Direct methanol fuel cells (DMFCs) represent an interesting alternative in obtaining electricity in a clean and efficient way. Portable power sources are one of the most promising applications of passive DMFCs. One of the requirements in these devices is to use high alcohol concentration, which due...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Asteazaran, Mariano, Bengio, Silvina, Triaca, Walter, Castro Luna, Ana
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: Springer 2017
Materias:
ORR; PtCo/C; PtCoRu/C; Methanol crossover; DMFC; Methanol-tolerant cathode catalysts
Acceso en línea:http://hdl.handle.net/20.500.12272/2630
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-2630
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic ORR; PtCo/C; PtCoRu/C; Methanol crossover; DMFC; Methanol-tolerant cathode catalysts
spellingShingle ORR; PtCo/C; PtCoRu/C; Methanol crossover; DMFC; Methanol-tolerant cathode catalysts
Asteazaran, Mariano
Bengio, Silvina
Triaca, Walter
Castro Luna, Ana
Methanol tolerant electrocatalysts for the oxygen reduction reaction
topic_facet ORR; PtCo/C; PtCoRu/C; Methanol crossover; DMFC; Methanol-tolerant cathode catalysts
description Direct methanol fuel cells (DMFCs) represent an interesting alternative in obtaining electricity in a clean and efficient way. Portable power sources are one of the most promising applications of passive DMFCs. One of the requirements in these devices is to use high alcohol concentration, which due to methanol crossover causes a considerable loss of fuel cell efficiency. In order to develop methanol tolerant cathodes with suitable activity, different supported catalysts namely PtCo/C and PtCoRu/C, were prepared either via ethylene glycol reduction (EG) with or without microwave heating assistance (MW) or via the alloy method, the latter followed by a thermal treatment in a reducing atmosphere (N2/H2). All cathode-catalysts were tested to determine the role of the components in simultaneously enhancing the oxygen reduction reaction (ORR) and discouraging the methanol oxidation reaction. According to the synthesis methodology, X-ray photoelectron spectra showed that the amount of metal oxides on the surface varies, being higher on the PtCo/C EG and PtCoRu/C EG catalysts. The electrochemical characterization of the catalysts was accomplished in a three electrodes electrochemical cell with a glassy carbon rotating disk electrode covered with a thin catalytic film as working electrode. To study the ORR and the influence of different methanol concentrations, linear sweep voltammetry and cyclic voltammetry were employed. The PtCo/C EG, with an important metal oxide amount on the surface, and the PtCoRu/C MW and EG electrodes, both with RuO2 on their surfaces, were the most tolerant to methanol presence.
format Artículo
publishedVersion
Artículo
author Asteazaran, Mariano
Bengio, Silvina
Triaca, Walter
Castro Luna, Ana
author_facet Asteazaran, Mariano
Bengio, Silvina
Triaca, Walter
Castro Luna, Ana
author_sort Asteazaran, Mariano
title Methanol tolerant electrocatalysts for the oxygen reduction reaction
title_short Methanol tolerant electrocatalysts for the oxygen reduction reaction
title_full Methanol tolerant electrocatalysts for the oxygen reduction reaction
title_fullStr Methanol tolerant electrocatalysts for the oxygen reduction reaction
title_full_unstemmed Methanol tolerant electrocatalysts for the oxygen reduction reaction
title_sort methanol tolerant electrocatalysts for the oxygen reduction reaction
publisher Springer
publishDate 2017
url http://hdl.handle.net/20.500.12272/2630
work_keys_str_mv AT asteazaranmariano methanoltolerantelectrocatalystsfortheoxygenreductionreaction
AT bengiosilvina methanoltolerantelectrocatalystsfortheoxygenreductionreaction
AT triacawalter methanoltolerantelectrocatalystsfortheoxygenreductionreaction
AT castrolunaana methanoltolerantelectrocatalystsfortheoxygenreductionreaction
bdutipo_str Repositorios
_version_ 1764820552536555522

Ejemplares similares