Physicochemical characterization of highly dispersed platinum and chromium on zeolite beta

Yoshiyuki Izutsu, Yuki Oku, Yusuke Hidaka, Naoki Kanaya, Yoshiki Nakajima, Jun Fukuroi, Kaname Yoshida, Yukichi Sasaki, Yasushi Sekine, Masahiko Matsukata

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Structures of platinum and chromium supported on zeolite beta were investigated by XAFS, XPS, UV-vis, NH3-TPD, XRD, CO chemisorption, and molecular dynamics simulation. Both platinum and chromium were uniformly dispersed in the micropore of zeolite beta. Loading of chromium helped platinum to disperse highly and stabilized in the micropore of beta. Major species of platinum on PtCr/beta after calcination at 773 K was Pt2+ forming a Pt-O bond. The Pt-O bond disappeared, and a Pt-Pt bond did not appear by reducing PtCr/beta in hydrogen, accompanying formation of Pt0. Chromium was loaded as chromate anion in the micropore of zeolite. Results of molecular dynamics simulation showed that Pt2+ associated with CrO4 2- in the micropore of zeolite beta was more stable than those in the absence of chromium species. We concluded that CrO 4 2- electrostatically stabilizes Pt2+ and inhibits migration and aggregation of platinum.

    Original languageEnglish
    Pages (from-to)10746-10753
    Number of pages8
    JournalJournal of Physical Chemistry C
    Volume118
    Issue number20
    DOIs
    Publication statusPublished - 2014 May 22

    Fingerprint

    Zeolites
    Chromium
    Platinum
    chromium
    platinum
    Molecular dynamics
    molecular dynamics
    Chromates
    chromates
    Computer simulation
    Carbon Monoxide
    Temperature programmed desorption
    Chemisorption
    Calcination
    roasting
    chemisorption
    Anions
    Hydrogen
    Negative ions
    Agglomeration

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Electronic, Optical and Magnetic Materials
    • Surfaces, Coatings and Films
    • Energy(all)

    Cite this

    Physicochemical characterization of highly dispersed platinum and chromium on zeolite beta. / Izutsu, Yoshiyuki; Oku, Yuki; Hidaka, Yusuke; Kanaya, Naoki; Nakajima, Yoshiki; Fukuroi, Jun; Yoshida, Kaname; Sasaki, Yukichi; Sekine, Yasushi; Matsukata, Masahiko.

    In: Journal of Physical Chemistry C, Vol. 118, No. 20, 22.05.2014, p. 10746-10753.

    Research output: Contribution to journalArticle

    Izutsu, Y, Oku, Y, Hidaka, Y, Kanaya, N, Nakajima, Y, Fukuroi, J, Yoshida, K, Sasaki, Y, Sekine, Y & Matsukata, M 2014, 'Physicochemical characterization of highly dispersed platinum and chromium on zeolite beta', Journal of Physical Chemistry C, vol. 118, no. 20, pp. 10746-10753. https://doi.org/10.1021/jp500232s
    Izutsu Y, Oku Y, Hidaka Y, Kanaya N, Nakajima Y, Fukuroi J et al. Physicochemical characterization of highly dispersed platinum and chromium on zeolite beta. Journal of Physical Chemistry C. 2014 May 22;118(20):10746-10753. https://doi.org/10.1021/jp500232s
    Izutsu, Yoshiyuki ; Oku, Yuki ; Hidaka, Yusuke ; Kanaya, Naoki ; Nakajima, Yoshiki ; Fukuroi, Jun ; Yoshida, Kaname ; Sasaki, Yukichi ; Sekine, Yasushi ; Matsukata, Masahiko. / Physicochemical characterization of highly dispersed platinum and chromium on zeolite beta. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 20. pp. 10746-10753.
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    AU - Nakajima, Yoshiki

    AU - Fukuroi, Jun

    AU - Yoshida, Kaname

    AU - Sasaki, Yukichi

    AU - Sekine, Yasushi

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