An operando DRIFTS-MS study on model Ce0.5Zr0.5O2 redox catalyst: a critical evaluation of DRIFTS and MS data on CO abatement reaction (Articolo in rivista)

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  • An operando DRIFTS-MS study on model Ce0.5Zr0.5O2 redox catalyst: a critical evaluation of DRIFTS and MS data on CO abatement reaction (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.cattod.2005.11.014 (literal)
Alternative label
  • Mondelli, Cecilia ; Dal Santo, Vladimiro ; Trovarelli, Alessandro ; Boaro, Marta ; Fusi, Achille ; Psaro, Rinaldo ; Recchia, Sandro (2006)
    An operando DRIFTS-MS study on model Ce0.5Zr0.5O2 redox catalyst: a critical evaluation of DRIFTS and MS data on CO abatement reaction
    in Catalysis Today; ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mondelli, Cecilia ; Dal Santo, Vladimiro ; Trovarelli, Alessandro ; Boaro, Marta ; Fusi, Achille ; Psaro, Rinaldo ; Recchia, Sandro (literal)
Pagina inizio
  • 81 (literal)
Pagina fine
  • 86 (literal)
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  • 113 (literal)
Rivista
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  • 6 (literal)
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  • 1-2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dip. C.I.M.A., Universita` di Milano, Via Venezian 21, 20133 Milano, Italy ISTM-CNR, Via C. Golgi 19, 20133 Milano, Italy Dipartimento di Scienze e Tecnologie Chimiche, Universita` di Udine, Via Cotonificio 108, 33100 Udine, Italy Dip. Scienze CC.FF.MM., Universita` dell'Insubria, Via Valleggio 11, 22100 Como, Italy (literal)
Titolo
  • An operando DRIFTS-MS study on model Ce0.5Zr0.5O2 redox catalyst: a critical evaluation of DRIFTS and MS data on CO abatement reaction (literal)
Abstract
  • An operando study of CO oxidation by Ce0.5Zr0.5O2 catalysts under dynamic conditions was performed using a prototype gas flow DRIFTS reaction chamber coupled with a MS. Previous studies conducted under oscillating CO/O2 feedstream conditions, allowed the identification of carbonates as the C-containing storage species on the catalyst surface, with their decomposition being the origin of CO2 evolution dynamics during O2 pulses. A deeper comparison of the time-resolved DRIFTS and MS data revealed some differences that were related to the different observation points of the two detectors. Two methods for the determination of penetration depth of IR radiation in catalysts beds were compared and discussed. From the analysis of DRIFTS data, two main pathways for carbonates decomposition were found at the beginning of the bed of the catalysts: one leading to CO2 and Ce(IV) sites and another to CO and Ce(III). The last one is active only above 673 K. The preference of one pathway against the other is strictly related to the Ce(III)/Ce(IV) ratio that shows strong variation during the entire cycle. (literal)
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