Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation

Direct ethanol fuel cells (DEFCs) have shown a high potential to supply energy and contribute to saving the climate due to their bioethanol sustainability and carbon neutrality. Nonetheless, there is a consistent need to develop new catalyst electrodes that are active for the ethanol oxidation react...

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Autores principales:	Ahmed Elsheikh, Hamouda M. Mousa, James McGregor
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	supported intermetallic nanoparticles alloy formation surface microstructure ethanol oxidation Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/9d494ad1b2bd4040ab5f80ebcaedc4bb
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spelling	oai:doaj.org-article:9d494ad1b2bd4040ab5f80ebcaedc4bb2021-11-25T18:23:09ZSynthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation10.3390/mi121113272072-666Xhttps://doaj.org/article/9d494ad1b2bd4040ab5f80ebcaedc4bb2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1327https://doaj.org/toc/2072-666XDirect ethanol fuel cells (DEFCs) have shown a high potential to supply energy and contribute to saving the climate due to their bioethanol sustainability and carbon neutrality. Nonetheless, there is a consistent need to develop new catalyst electrodes that are active for the ethanol oxidation reaction (EOR). In this work, two C-supported PdIrNi catalysts, that have been reported only once, are prepared via a facile NaBH<sub>4</sub> co-reduction route. Their physiochemical characterization (X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS)) results show alloyed PdIrNi nanoparticles that are well dispersed (<3 nm) and exist in metallic state that is air-stable apart from Ni and, slightly, Pd. Their electrocatalytic activity towards EOR was evaluated by means of cyclic voltammetry (CV) and chronoamperometry (CA). Even though the physiochemical characterization of PdIrNi/C and Pd<sub>4</sub>Ir<sub>2</sub>Ni<sub>1</sub>/C is promising, their EOR performance has proven them less active than their Pd/C counterpart. Although the oxidation current peak of Pd/C is 1.8 A/mgPd, it is only 0.48 A/mgPd for Pd<sub>4</sub>Ir<sub>2</sub>Ni<sub>1</sub>/C and 0.52 A/mg<sub>Pd</sub> for PdIrNi/C. These results were obtained three times and are reproducible, but since they do not add up with the sound PdIrNi microstructure, more advanced and in situ EOR studies are necessary to better understand the poor EOR performance.Ahmed ElsheikhHamouda M. MousaJames McGregorMDPI AGarticlesupported intermetallic nanoparticlesalloy formationsurface microstructureethanol oxidationMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1327, p 1327 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	supported intermetallic nanoparticles alloy formation surface microstructure ethanol oxidation Mechanical engineering and machinery TJ1-1570
spellingShingle	supported intermetallic nanoparticles alloy formation surface microstructure ethanol oxidation Mechanical engineering and machinery TJ1-1570 Ahmed Elsheikh Hamouda M. Mousa James McGregor Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation
description	Direct ethanol fuel cells (DEFCs) have shown a high potential to supply energy and contribute to saving the climate due to their bioethanol sustainability and carbon neutrality. Nonetheless, there is a consistent need to develop new catalyst electrodes that are active for the ethanol oxidation reaction (EOR). In this work, two C-supported PdIrNi catalysts, that have been reported only once, are prepared via a facile NaBH<sub>4</sub> co-reduction route. Their physiochemical characterization (X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS)) results show alloyed PdIrNi nanoparticles that are well dispersed (<3 nm) and exist in metallic state that is air-stable apart from Ni and, slightly, Pd. Their electrocatalytic activity towards EOR was evaluated by means of cyclic voltammetry (CV) and chronoamperometry (CA). Even though the physiochemical characterization of PdIrNi/C and Pd<sub>4</sub>Ir<sub>2</sub>Ni<sub>1</sub>/C is promising, their EOR performance has proven them less active than their Pd/C counterpart. Although the oxidation current peak of Pd/C is 1.8 A/mgPd, it is only 0.48 A/mgPd for Pd<sub>4</sub>Ir<sub>2</sub>Ni<sub>1</sub>/C and 0.52 A/mg<sub>Pd</sub> for PdIrNi/C. These results were obtained three times and are reproducible, but since they do not add up with the sound PdIrNi microstructure, more advanced and in situ EOR studies are necessary to better understand the poor EOR performance.
format	article
author	Ahmed Elsheikh Hamouda M. Mousa James McGregor
author_facet	Ahmed Elsheikh Hamouda M. Mousa James McGregor
author_sort	Ahmed Elsheikh
title	Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation
title_short	Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation
title_full	Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation
title_fullStr	Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation
title_full_unstemmed	Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation
title_sort	synthesis of carbon-supported pdirni catalysts and their performance towards ethanol electrooxidation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9d494ad1b2bd4040ab5f80ebcaedc4bb
work_keys_str_mv	AT ahmedelsheikh synthesisofcarbonsupportedpdirnicatalystsandtheirperformancetowardsethanolelectrooxidation AT hamoudammousa synthesisofcarbonsupportedpdirnicatalystsandtheirperformancetowardsethanolelectrooxidation AT jamesmcgregor synthesisofcarbonsupportedpdirnicatalystsandtheirperformancetowardsethanolelectrooxidation
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Synthesis of Carbon-Supported PdIrNi Catalysts and Their Performance towards Ethanol Electrooxidation

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