Synergistic effect of simultaneous doping of ceria nanorods with Cu and Cr on CO oxidation and NO reduction
File(s)chem.202004623.pdf (1.94 MB)
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Author(s)
Type
Journal Article
Abstract
Ceria particles play a key role in catalytic applications such as automotive three-way catalytic systems in which toxic CO and NO are oxidized and reduced to safe CO2 and N2, respectively. In this work, we explore the incorporation of Cu and Cr metals as dopants in the crystal structure of ceria nanorods prepared by a single-step hydrothermal synthesis. XRD, Raman and XPS confirm the incorporation of Cu and Cr in the ceria crystal lattices, offering ceria nanorods with a higher concentration of oxygen vacancies. XPS also confirms the presence of Cr and Cu surface species. H2-TPR and XPS analysis show that the simultaneous Cu and Cr co-doping results in a catalyst with a higher surface Cu concentration and a much-enhanced surface reducibility, in comparison with either undoped or singly doped (Cu or Cr) ceria nanorods. While single Cu doping enhances catalytic CO oxidation and Cr doping improves catalytic NO reduction, co-doping with both Cu and Cr enhances the benefits of both dopants in a synergistic manner employing roughly a quarter of dopant weight.
Date Issued
2021-01-26
Date Acceptance
2020-11-18
Citation
Chemistry: A European Journal, 2021, 27 (6), pp.2165-2174
ISSN
0947-6539
Publisher
Wiley
Start Page
2165
End Page
2174
Journal / Book Title
Chemistry: A European Journal
Volume
27
Issue
6
Copyright Statement
© 2020 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000602501800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
cerium
CO oxidation
hydrothermal synthesis
nanorods
NO reduction
CONTAINING CEO2 NANOPOLYHEDRA
OXYGEN VACANCY FORMATION
TRANSITION-METAL
PHYSICOCHEMICAL PROPERTIES
CATALYTIC PERFORMANCE
NANOSTRUCTURED CERIA
COOX/CEO2 CATALYSTS
RAMAN-SPECTROSCOPY
CARBON-MONOXIDE
MIXED OXIDES
Publication Status
Published
Date Publish Online
2020-11-19