Rh/CeO2 catalyst preparation and characterization for hydrogen production from ethanol partial oxidation

Hydrogen production for fuel cells from ethanol partial oxidation was evaluated on 1% Rh/CeO₂ catalyst. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) were used to analyze carbon formation and the possible sintering of the metallic phase. X-ray fluorescence (XRF), nitr...

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Bibliographic Details
Published in:Journal of materials science 2008, Vol.43 (2), p.440-449
Main Authors: Costa, L. O. O, Vasconcelos, S. M. R, Pinto, A. L, Silva, A. M, Mattos, L. V, Noronha, F. B, Borges, L. E. P
Format: Article
Language:English
Subjects:
Acetaldehyde
adsorption
Applied sciences
Carbon
Catalysis
Catalysts
Cerium oxides
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Energy
energy-dispersive X-ray analysis
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Ethanol
Exact sciences and technology
fluorescence
Fuel cells
fuel production
General and physical chemistry
Hydrogen production
Materials Science
nitrogen
Oxidation
Polymer Sciences
Rhodium
Scanning electron microscopy
Sintering
Solid Mechanics
Surface physical chemistry
temperature
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Transmission electron microscopy
X-radiation
X-ray fluorescence
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Summary:Hydrogen production for fuel cells from ethanol partial oxidation was evaluated on 1% Rh/CeO₂ catalyst. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) were used to analyze carbon formation and the possible sintering of the metallic phase. X-ray fluorescence (XRF), nitrogen adsorption, and temperature-programmed reduction (TPR) were also used for catalyst characterization. Two groups of rhodium particles of different sizes were observed. By SEM/EDS analysis, no residual chloride was identified. TEM made it possible to identify the presence of rhodium in small clusters. On the other hand, products distribution was affected by reaction temperature. At 473 K, only traces of acetaldehyde were detected for the Rh/CeO₂ catalyst. In the reaction conditions, no deactivation of the catalyst due to carbon deposition or sintering of the metal was observed. Overall, our results show that the performance of Rh/CeO₂ catalyst points to promising applications in terms of H₂ production for fuel cells technology by ethanol partial oxidation.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-007-1982-2