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Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes

Direct methanol fuel cells (DMFCs) are electrochemical devices that efficiently produce electricity and are characterized by a large flexibility for portable applications and high energy density. Methanol crossover is one of the main obstacles for DMFC commercialization, forcing the search for highl...

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Autores principales: Rivera Gavidia, Luis M., Sebastián, David, Pastor, Elena, Aricò, Antonino S., Baglio, Vincenzo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5552173/
https://www.ncbi.nlm.nih.gov/pubmed/28772937
http://dx.doi.org/10.3390/ma10060580
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author Rivera Gavidia, Luis M.
Sebastián, David
Pastor, Elena
Aricò, Antonino S.
Baglio, Vincenzo
author_facet Rivera Gavidia, Luis M.
Sebastián, David
Pastor, Elena
Aricò, Antonino S.
Baglio, Vincenzo
author_sort Rivera Gavidia, Luis M.
collection PubMed
description Direct methanol fuel cells (DMFCs) are electrochemical devices that efficiently produce electricity and are characterized by a large flexibility for portable applications and high energy density. Methanol crossover is one of the main obstacles for DMFC commercialization, forcing the search for highly electro-active and methanol tolerant cathodes. In the present work, carbon-supported Pd and PdFe catalysts were synthesized using a sodium borohydride reduction method and physico-chemically characterized using transmission electron microscopy (TEM) and X-ray techniques such as photoelectron spectroscopy (XPS), diffraction (XRD) and energy dispersive spectroscopy (EDX). The catalysts were investigated as DMFC cathodes operating at different methanol concentrations (up to 10 M) and temperatures (60 °C and 90 °C). The cell based on PdFe/C cathode presented the best performance, achieving a maximum power density of 37.5 mW·cm(−2) at 90 °C with 10 M methanol, higher than supported Pd and Pt commercial catalysts, demonstrating that Fe addition yields structural changes to Pd crystal lattice that reduce the crossover effects in DMFC operation.
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spelling pubmed-55521732017-08-14 Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes Rivera Gavidia, Luis M. Sebastián, David Pastor, Elena Aricò, Antonino S. Baglio, Vincenzo Materials (Basel) Article Direct methanol fuel cells (DMFCs) are electrochemical devices that efficiently produce electricity and are characterized by a large flexibility for portable applications and high energy density. Methanol crossover is one of the main obstacles for DMFC commercialization, forcing the search for highly electro-active and methanol tolerant cathodes. In the present work, carbon-supported Pd and PdFe catalysts were synthesized using a sodium borohydride reduction method and physico-chemically characterized using transmission electron microscopy (TEM) and X-ray techniques such as photoelectron spectroscopy (XPS), diffraction (XRD) and energy dispersive spectroscopy (EDX). The catalysts were investigated as DMFC cathodes operating at different methanol concentrations (up to 10 M) and temperatures (60 °C and 90 °C). The cell based on PdFe/C cathode presented the best performance, achieving a maximum power density of 37.5 mW·cm(−2) at 90 °C with 10 M methanol, higher than supported Pd and Pt commercial catalysts, demonstrating that Fe addition yields structural changes to Pd crystal lattice that reduce the crossover effects in DMFC operation. MDPI 2017-05-25 /pmc/articles/PMC5552173/ /pubmed/28772937 http://dx.doi.org/10.3390/ma10060580 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rivera Gavidia, Luis M.
Sebastián, David
Pastor, Elena
Aricò, Antonino S.
Baglio, Vincenzo
Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
title Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
title_full Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
title_fullStr Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
title_full_unstemmed Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
title_short Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
title_sort carbon-supported pd and pdfe alloy catalysts for direct methanol fuel cell cathodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5552173/
https://www.ncbi.nlm.nih.gov/pubmed/28772937
http://dx.doi.org/10.3390/ma10060580
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