Nanosize effects, physicochemical properties, and catalytic oxidation pattern of the redox-precipitated MnCeOx system (Articolo in rivista)

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  • Nanosize effects, physicochemical properties, and catalytic oxidation pattern of the redox-precipitated MnCeOx system (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp8068249 (literal)
Alternative label
  • Francesco Arena ; Giuseppe Trunfio ; Barbara Fazio ; Jacopo Negro ; Lorenzo Spadaro (2009)
    Nanosize effects, physicochemical properties, and catalytic oxidation pattern of the redox-precipitated MnCeOx system
    in Journal of physical chemistry. C; American Chemical Society, Washington (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Francesco Arena ; Giuseppe Trunfio ; Barbara Fazio ; Jacopo Negro ; Lorenzo Spadaro (literal)
Pagina inizio
  • 2822 (literal)
Pagina fine
  • 2829 (literal)
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  • 113 (literal)
Rivista
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  • 8 (literal)
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  • 7 (literal)
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  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
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  • Dipartimento di Chimica Industriale e Ingegneria dei Materiali, UniVersita` degli Studi di Messina, Salita Sperone 31 c.p. 29, I-98166 S. Agata (Messina), Italy ; Istituto CNR-ITAE \"Nicola Giordano\", Salita S. Lucia 5, I-98126 S. Lucia (Messina), Italy ; Istituto di Processi Chimico-Fisici del CNR (CNR-IPCF) di Messina, Salita Sperone Contrada Papardo, I-98158 Faro Superiore (Messina), Italy (literal)
Titolo
  • Nanosize effects, physicochemical properties, and catalytic oxidation pattern of the redox-precipitated MnCeOx system (literal)
Abstract
  • A series of nanostructured MnCeOx catalysts with superior textural and redox properties in comparison to coprecipitated systems was synthesized via the \"redox-precipitation\" route (Chem. Mater. 2007, 19, 2269). Characterization data prove that the redox-precipitated system consists of uniformly sized (d ? 20 nm) spherical nanoparticles ensuring large surface area (120-260 m2/g) and pore volume (0.5-0.6 cm3/g), and a regular pore size distribution in a wide range of Mn/Ce ratios (1/3 to 3/1). The lack of long-range crystalline order and a homogeneous chemical composition signal that Mn and Ce oxides form composite nanodomains with a molecular dispersion of the active phase. Superior MnOx accessibility, strong MnOx-CeO2 interaction, and higher average oxidation number of both Mn and Ce ions strongly promote the reactive surface oxygen availability and the CO oxidation activity in the range of 323-423 K, also accounting for the better stability of the redox-precipitated system under reaction conditions. (literal)
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