Published 2013 | Version v1
Miscellaneous Metadata-only

Reduction behaviour of nanostructured rare earth-doped ceria solid solutions: XRD and Ce L3-edge XANES in situ studies

Creators

  • 1. Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas, Buenos Aires (Argentina)
  • 2. Comisión Nacional de Energia Atômica, Buenos Aires, B.A. (Argentina)
  • 3. University of St Andrews, St Andrews (United Kingdom)

Description

Full text: Ceria (CeO2) and rare earth (RE)-doped ceria (Ce1−xRExO2−x/2) mixed oxides are important materials in significant environmental applications such as the three-way catalysts (TWC) and the electrolyte and anode materials for solid oxide fuel cell (SOFC) technology. In the present work, the RE-doped ceria (RE: Gd, Sm, Tb and Pr ) system was studied. All samples were characterized by XRD, X-ray absorption near-edge spectroscopy (XANES) and scanning and high resolution transmission electron microscopy (SEM and HRTEM). In order to determine the effects of RE content on reduction behaviour, catalysts were studied by in situ XRD and XANES (Ce L3-edge) experiments carried out under a 5%H2/He atmosphere. The results obtained were fundamental to understand the influence of Ce4+/ Ce3'+ redox couple in nanostructured RE-doped ceria for catalytic applications. (author)

Part of:
Proceedings of the 23. RAU: annual users meeting LNLS/CNPEM. Abstracts of scientific papers

Additional details

Additional titles

Original title (English)
Anais da 23. RAU: reunião anual de usuários do LNLS/CNPEM. Resumos de trabalhos cientificos

Publishing Information

Imprint Title
Proceedings of the 23. RAU: annual users meeting LNLS/CNPEM. Abstracts of scientific papers
Imprint Pagination
192 p.
Journal Page Range
p. 88
Report number
INIS-BR--24555

Conference

Title
annual users meeting LNLS/CNPEM
Acronym
23. RAU
Dates
26-27 Feb 2013
Place
Campinas, SP (Brazil)

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
54017755
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION SPECTROSCOPY; ANODES; CATALYSTS; CERIUM IONS; CERIUM OXIDES; DOPED MATERIALS; ELECTROLYTES; NANOSTRUCTURES; RARE EARTHS; SCANNING ELECTRON MICROSCOPY; SOLID OXIDE FUEL CELLS; SOLID SOLUTIONS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY
Descriptors DEC
CERIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; DIRECT ENERGY CONVERTERS; DISPERSIONS; ELECTROCHEMICAL CELLS; ELECTRODES; ELECTRON MICROSCOPY; ELEMENTS; FUEL CELLS; HIGH-TEMPERATURE FUEL CELLS; HOMOGENEOUS MIXTURES; IONS; MATERIALS; METALS; MICROSCOPY; MIXTURES; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SCATTERING; SOLID ELECTROLYTE FUEL CELLS; SOLUTIONS; SPECTROSCOPY

Optional Information

Notes
Presented in abstract form only. The full text is entered in this record Imprint:Anais da 23. RAU: reuni#Latin Small Letter A With Tilde#o anual de usu#Latin Small Letter A With Acute#rios do LNLS/CNPEM. Resumos de trabalhos cientificos