Synergistic Effect of Simultaneous Doping of Ceria Nanorods with Cu and Cr on CO Oxidation and NO Reduction
Rood, Shawn (University of Bath)
Pastor-Algaba, Oriol (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Tosca-Princep, Albert (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Pinho, Bruno (University of Cambridge)
Isaacs, Mark (University College London)
Torrente-Murciano, Laura (University of Cambridge)
Eslava, Salvador (Imperial College London)

Date:	2020
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 CO and N, 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. H-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. Doped up for detox : Ceria particles play a key role in catalytic applications such as automotive three-way catalytic systems in which toxic CO and NO are respectively oxidized and reduced to safe CO and N. We explored the incorporation of Cu and Cr metals as dopants in the crystal structure of ceria nanorods prepared by a single-step hydrothermal synthesis. Such co-doped ceria nanorods show synergistic improvement in reducibility and enhanced performance for CO oxidation and NO reduction.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Cerium ; CO oxidation ; Hydrothermal synthesis ; Nanorods ; NO reduction
Published in:	Chemistry, Vol. 27, Issue 6 (January 2021) , p. 2165-2174, ISSN 1521-3765

DOI: 10.1002/chem.202004623
PMID: 33210814

10 p, 1.9 MB

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