Research on methanol tolerant catalysts for the oxygen reduction reaction
Direct methanol fuel cells (DMFCs) generate electricity in a clean and efficient way, so they are a valuable alternative to traditional environmentally harmful technologies. Portable power sources are one of the applications of passive DMFCs. One of the requirements in these devices is the use of hi...
Guardado en:
Autores principales: | , , , , , |
---|---|
Formato: | Artículo publishedVersion |
Lenguaje: | Inglés Inglés |
Publicado: |
Springer
2017
|
Materias: | |
Acceso en línea: | http://hdl.handle.net/20.500.12272/2627 |
Aporte de: |
id |
I68-R174-20.500.12272-2627 |
---|---|
record_format |
dspace |
institution |
Universidad Tecnológica Nacional |
institution_str |
I-68 |
repository_str |
R-174 |
collection |
RIA - Repositorio Institucional Abierto (UTN) |
language |
Inglés Inglés |
topic |
ORR; DMFC; methanol crossover; methanol-tolerant catalyst; trimetallic catalyst; direct methanol fuel cells |
spellingShingle |
ORR; DMFC; methanol crossover; methanol-tolerant catalyst; trimetallic catalyst; direct methanol fuel cells Asteazaran, Mariano Cespedes, German Bengio, Silvina Moreno, Mario Triaca, Walter Castro Luna, Ana Research on methanol tolerant catalysts for the oxygen reduction reaction |
topic_facet |
ORR; DMFC; methanol crossover; methanol-tolerant catalyst; trimetallic catalyst; direct methanol fuel cells |
description |
Direct methanol fuel cells (DMFCs) generate electricity in a clean and efficient way, so they are a valuable alternative to traditional environmentally harmful technologies. Portable power sources are one of the applications of passive DMFCs. One of the requirements in these devices is the use of high alcohol concentration. Methanol permeation across the polymer electrolyte membrane (methanol crossover) causes a loss of fuel cell efficiency as the oxygen reduction reaction (ORR) and the methanol oxidation reaction (MOR) occur simultaneously at the cathode. To develop methanol-tolerant catalysts with suitable activity, different PtM/C and PtMRu/C combinations with M = Co or Fe were prepared by a modified impregnation method. The synthesized catalysts were studied to determine the role of the components in enhancing the ORR and simultaneously discouraging the MOR. The materials were characterized by TEM, XPS and EDS. Well-distributed particles for all the catalysts were shown by TEM. XPS spectra revealed that the method produces a great amount of metallic Pt. The electrochemical characterization was carried out by linear sweep voltammetry and cyclic voltammetry, in a three-electrode electrochemical cell with a glassy carbon rotating disk electrode covered with a thin catalytic layer and a Nafion film as the working electrode. Binary and ternary catalysts have a good activity for the ORR. However, the enhanced activity of binary catalysts is lost when the ORR is studied in the presence of methanol. Ternary catalysts containing
Ru showed higher methanol-tolerance, regardless of the composition. |
format |
Artículo publishedVersion Artículo |
author |
Asteazaran, Mariano Cespedes, German Bengio, Silvina Moreno, Mario Triaca, Walter Castro Luna, Ana |
author_facet |
Asteazaran, Mariano Cespedes, German Bengio, Silvina Moreno, Mario Triaca, Walter Castro Luna, Ana |
author_sort |
Asteazaran, Mariano |
title |
Research on methanol tolerant catalysts for the oxygen reduction reaction |
title_short |
Research on methanol tolerant catalysts for the oxygen reduction reaction |
title_full |
Research on methanol tolerant catalysts for the oxygen reduction reaction |
title_fullStr |
Research on methanol tolerant catalysts for the oxygen reduction reaction |
title_full_unstemmed |
Research on methanol tolerant catalysts for the oxygen reduction reaction |
title_sort |
research on methanol tolerant catalysts for the oxygen reduction reaction |
publisher |
Springer |
publishDate |
2017 |
url |
http://hdl.handle.net/20.500.12272/2627 |
work_keys_str_mv |
AT asteazaranmariano researchonmethanoltolerantcatalystsfortheoxygenreductionreaction AT cespedesgerman researchonmethanoltolerantcatalystsfortheoxygenreductionreaction AT bengiosilvina researchonmethanoltolerantcatalystsfortheoxygenreductionreaction AT morenomario researchonmethanoltolerantcatalystsfortheoxygenreductionreaction AT triacawalter researchonmethanoltolerantcatalystsfortheoxygenreductionreaction AT castrolunaana researchonmethanoltolerantcatalystsfortheoxygenreductionreaction |
bdutipo_str |
Repositorios |
_version_ |
1764820552533409792 |