Role of the Metal-Oxide Support in the Catalytic Activity of Pd Nanoparticles for Ethanol Electrooxidation in Alkaline Media

Evans Angwenyi Monyoncho; Spyridon Ntais; Nicolas Brazeau; Jhing Jhou Wu; Chia Liang Sun; Elena A. Baranova

doi:10.1002/celc.201500432

Role of the Metal-Oxide Support in the Catalytic Activity of Pd Nanoparticles for Ethanol Electrooxidation in Alkaline Media

Evans Angwenyi Monyoncho, Spyridon Ntais, Nicolas Brazeau, Jhing Jhou Wu, Chia Liang Sun, Elena A. Baranova^*

^*Corresponding author for this work

Department of Chemical and Materials Engineering

Research output: Contribution to journal › Journal Article › peer-review

77 Scopus citations

Abstract

The promotional role of oxide supports (CeO₂, SnO₂, TiO₂) on ethanol electrooxidation in alkaline media over Pd nanoparticles (NPs) is presented and compared to Pd on carbon. XPS revealed a shift to lower binding energy of the Pd3d peak when Pd NPs were deposited on metal oxides, implying a charge transfer from the oxides to the Pd. The catalytic activity of the supported NPs for ethanol electrooxidation was assessed by using cyclic voltammetry and chronoamperometry. The electrooxidation products were monitored insitu, using polarization modulation-infrared reflection absorption spectroscopy (PM-IRRAS), which revealed that the supports influence the selectivity of reactions on Pd. Pd/CeO₂ has superior selectivity towards breaking the C-C bond to produce CO₂ compared to the other three supports. Acetate, as a product, was evident on all of the catalysts, but at different ratios. Pd supported on metal oxides showed higher activity and, in particular, CeO₂ and SnO₂ stand out as the best supports.

Original language	English
Pages (from-to)	218-227
Number of pages	10
Journal	ChemElectroChem
Volume	3
Issue number	2
DOIs	https://doi.org/10.1002/celc.201500432
State	Published - 01 02 2016

Bibliographical note

Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

Ethanol electrooxidation
Infrared spectroscopy
Nanocatalysis
Palladium
Supported catalysts

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title = "Role of the Metal-Oxide Support in the Catalytic Activity of Pd Nanoparticles for Ethanol Electrooxidation in Alkaline Media",

abstract = "The promotional role of oxide supports (CeO2, SnO2, TiO2) on ethanol electrooxidation in alkaline media over Pd nanoparticles (NPs) is presented and compared to Pd on carbon. XPS revealed a shift to lower binding energy of the Pd3d peak when Pd NPs were deposited on metal oxides, implying a charge transfer from the oxides to the Pd. The catalytic activity of the supported NPs for ethanol electrooxidation was assessed by using cyclic voltammetry and chronoamperometry. The electrooxidation products were monitored insitu, using polarization modulation-infrared reflection absorption spectroscopy (PM-IRRAS), which revealed that the supports influence the selectivity of reactions on Pd. Pd/CeO2 has superior selectivity towards breaking the C-C bond to produce CO2 compared to the other three supports. Acetate, as a product, was evident on all of the catalysts, but at different ratios. Pd supported on metal oxides showed higher activity and, in particular, CeO2 and SnO2 stand out as the best supports.",

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doi = "10.1002/celc.201500432",

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AU - Monyoncho, Evans Angwenyi

AU - Ntais, Spyridon

AU - Brazeau, Nicolas

AU - Wu, Jhing Jhou

AU - Sun, Chia Liang

AU - Baranova, Elena A.

PY - 2016/2/1

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N2 - The promotional role of oxide supports (CeO2, SnO2, TiO2) on ethanol electrooxidation in alkaline media over Pd nanoparticles (NPs) is presented and compared to Pd on carbon. XPS revealed a shift to lower binding energy of the Pd3d peak when Pd NPs were deposited on metal oxides, implying a charge transfer from the oxides to the Pd. The catalytic activity of the supported NPs for ethanol electrooxidation was assessed by using cyclic voltammetry and chronoamperometry. The electrooxidation products were monitored insitu, using polarization modulation-infrared reflection absorption spectroscopy (PM-IRRAS), which revealed that the supports influence the selectivity of reactions on Pd. Pd/CeO2 has superior selectivity towards breaking the C-C bond to produce CO2 compared to the other three supports. Acetate, as a product, was evident on all of the catalysts, but at different ratios. Pd supported on metal oxides showed higher activity and, in particular, CeO2 and SnO2 stand out as the best supports.

AB - The promotional role of oxide supports (CeO2, SnO2, TiO2) on ethanol electrooxidation in alkaline media over Pd nanoparticles (NPs) is presented and compared to Pd on carbon. XPS revealed a shift to lower binding energy of the Pd3d peak when Pd NPs were deposited on metal oxides, implying a charge transfer from the oxides to the Pd. The catalytic activity of the supported NPs for ethanol electrooxidation was assessed by using cyclic voltammetry and chronoamperometry. The electrooxidation products were monitored insitu, using polarization modulation-infrared reflection absorption spectroscopy (PM-IRRAS), which revealed that the supports influence the selectivity of reactions on Pd. Pd/CeO2 has superior selectivity towards breaking the C-C bond to produce CO2 compared to the other three supports. Acetate, as a product, was evident on all of the catalysts, but at different ratios. Pd supported on metal oxides showed higher activity and, in particular, CeO2 and SnO2 stand out as the best supports.

KW - Ethanol electrooxidation

KW - Infrared spectroscopy

KW - Nanocatalysis

KW - Palladium

KW - Supported catalysts

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Role of the Metal-Oxide Support in the Catalytic Activity of Pd Nanoparticles for Ethanol Electrooxidation in Alkaline Media

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Keywords

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