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  • 1 Kuwait University Chemistry Department, Faculty of Science P.O. Box 5969 13060 Safat Kuwait
  • | 2 Minia University Chemistry Department, Faculty of Science El-Minia 61519 Egypt
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Abstract  

Nano-particle, pure and CuOx-modified, fluorite-structured cubic-CeO2 were successfully synthesized with surface areas near 240 m2/g applying a microemulsion method with mixed templating surfactants (viz. DDAB and Brij®35). Following calcination at 400–800 °C, the products were characterized by X-ray powder diffractometry, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy, and, then, tested as catalysts for methylbutynol decomposition and CO oxidation in the gas phase. Results obtained showed the pure and CuOx-modified cerias to exhibit comparable activities towards the alcohol decomposition into acetone and acetylene, but the modified ceria exhibited considerably higher activity towards the CO oxidation than the pure one. The calcination product of CuOx-modified ceria at 800 °C was capable of lowering the light-off temperature of the CO oxidation from 300 °C (on the pure) down to 70 °C. Surface chemical consequences of the CuOx-modification, viz. increasing the Ce(III)/Ce(IV) atomic ratio, as well as the establishment of Cu(I) and Cu(II) sites, have been allocated the responsibility of the observed upsurge of the CO oxidation activity.

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  • Impact Factor (2019): 1.520
  • Scimago Journal Rank (2019): 0.345
  • SJR Hirsch-Index (2019): 39
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2019): Q4 Catalysis
  • Impact Factor (2018): 1.142
  • Scimago Journal Rank (2018): 0.374
  • SJR Hirsch-Index (2018): 37
  • SJR Quartile Score (2018): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2018): Q3 Catalysis

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation
1974
Volumes
per Year
3
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)