Special Issue "Catalytic Applications of CeO2-Based Materials"

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Environmental Catalysis".

Deadline for manuscript submissions: 15 July 2019

Special Issue Editor

Guest Editor
Dr. Antonio Vita

CNR, ITAE Nicola Giordano, Via Salita S Lucia Contesse 5, I-98126 Messina, Italy
Website | E-Mail
Interests: catalyst synthesis and characterisation; structured catalysts and reactors; reforming processes; reformer prototypes; hydrogen/syngas production; CO2 conversion to methane

Special Issue Information

Dear Colleagues,

Over the past several years, cerium oxide and CeO2-containing materials have come under intense investigation as catalysts and as structural and electronic promoters of heterogeneous catalytic reactions. The fundamental interest in, and commercial applications of, cerium oxide as a catalytic material is due to its high abundance in the Earth’s crust, relatively low cost and unique properties, such as high oxygen storage capacity and mobility and ability to form solid solutions with a large variety of oxides. Apart from well-established uses in three-way catalysts (TWCs), CeO2 is emerging as a catalyst component for a wide range of catalytic applications: Reforming of hydrocarbons and oxygenates, CO oxidation and preferential CO oxidation in the presence of H2 (PROX), water–gas shift (WGS), conversion of syngas to alcohols, C–C coupling, aldol condensations, partial oxidation, solar-driven thermochemical CO2 reduction, CO2 conversion to fuels and chemicals and clean energy production with solid oxide fuel cells. This Special Issue is intended to cover the most recent progress in catalytic applications of CeO2-based materials from synthesis and characterization to the evaluation of activity in order to gain insights towards the development and the utilization of one of the most important industrial and environmental constituent in a wide range of catalytic systems. 

Dr. Antonio Vita
Guest Editor

Manuscript Submission Information

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Keywords

  • Cerium Oxide
  • Catalytic processes
  • Ceria-based Catalyst
  • Environmental catalysis
  • Solid solution
  • Redox properties
  • Heterogeneous catalysis
  • Three-way catalysts
  • Reforming
  • Water gas shift reaction
  • Partial oxidation
  • aldol condensations
  • C–C coupling
  • CO2 conversion
  • CO conversion
  • Fuel Cell

Published Papers (2 papers)

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Research

Open AccessArticle Highly Reducible Nanostructured CeO2 for CO Oxidation
Catalysts 2018, 8(11), 535; https://doi.org/10.3390/catal8110535
Received: 30 September 2018 / Revised: 2 November 2018 / Accepted: 5 November 2018 / Published: 11 November 2018
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Abstract
Ceria in nanoscale with different morphologies, rod, tube and cube, were prepared through a hydrothermal process. The structure, morphology and textural properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and isothermal N2 adsorption-desorption. Ceria with [...] Read more.
Ceria in nanoscale with different morphologies, rod, tube and cube, were prepared through a hydrothermal process. The structure, morphology and textural properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and isothermal N2 adsorption-desorption. Ceria with different morphologies were evaluated as catalysts for CO oxidation. CeO2 nanorods showed superior activity to the others. When space velocity was 12,000 mL·gcat−1·h−1, the reaction temperature for 90% CO conversion (T90) was 228 °C. The main reason for the high activity was the existence of large amounts of easily reducible oxygen species, with a reduction temperature of 217 °C on the surface of CeO2 nanorods. Another cause was their relatively large surface area. Full article
(This article belongs to the Special Issue Catalytic Applications of CeO2-Based Materials)
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Open AccessArticle Ce and Zr Modified WO3-TiO2 Catalysts for Selective Catalytic Reduction of NOx by NH3
Catalysts 2018, 8(9), 375; https://doi.org/10.3390/catal8090375
Received: 21 August 2018 / Revised: 25 August 2018 / Accepted: 3 September 2018 / Published: 5 September 2018
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Abstract
A series of Ce and/or Zr modified WO3-TiO2 catalysts were synthesized by the impregnation method, which were employed for NH3-SCR reaction. The T50 contour lines of NOx were used to quickly optimize catalyst composition, the Ce20Zr12.5WTi [...] Read more.
A series of Ce and/or Zr modified WO3-TiO2 catalysts were synthesized by the impregnation method, which were employed for NH3-SCR reaction. The T50 contour lines of NOx were used to quickly optimize catalyst composition, the Ce20Zr12.5WTi catalyst was considered to be the optimization result, and also exhibited excellent NH3-SCR activity and thermal stability with broad operation temperature window, which is a very promising catalyst for NOx abatement from diesel engine exhaust. The excellent catalytic performance is associated with the formation of Ce-Zr solid solution. The introduction of Zr to CeWTi catalyst facilitated the redox of Ce4+/Ce3+ and the formation of more acid sites, more Ce3+ ions, more oxygen vacancies, larger quantities of surface adsorbed oxygen species and NH3, which were beneficial for the excellent selective catalytic reduction (SCR) performance. Full article
(This article belongs to the Special Issue Catalytic Applications of CeO2-Based Materials)
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