Stabilization of catalytically active gold species in Fe-modified zeolites

N. Bogdanchikova, A. Simakov, E. Smolentseva, A. Pestryakov, M. H. Farias, J. A. Diaz, A. Tompos, M. Avalos

Результат исследований: Материалы для журналаСтатья

21 Цитирования (Scopus)

Аннотация

The influence of iron additive on redox, electronic and catalytic properties of gold incorporated into zeolite catalysts has been studied by means of TEM, XPS, XRD, TPR, ICP and AES. The interaction of gold with iron modifier was observed in Y-zeolites and mordenites with different cations and method of Fe incorporation (impregnation or ion exchange). This interaction leads to mutual influence on redox properties of Fe and Au ionic species and facilitates their reduction. Limited diffusion of Au precursor after Fe species deposition in narrow mordenite channels does not permit to incorporate Au in adequate concentration, while in large super-cage of Y-zeolites this limitation is absent. The structure of Y-zeolites favors formation of active gold species. Catalytic tests in CO oxidation show that Fe additive stabilizes the gold active species active at low-temperature (partly charged clusters) and makes them insensitive to redox treatments.

Язык оригиналаАнглийский
Страницы (с-по)4075-4083
Число страниц9
ЖурналApplied Surface Science
Том254
Номер выпуска13
DOI
СостояниеОпубликовано - 30 апр 2008

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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  • Цитировать

    Bogdanchikova, N., Simakov, A., Smolentseva, E., Pestryakov, A., Farias, M. H., Diaz, J. A., Tompos, A., & Avalos, M. (2008). Stabilization of catalytically active gold species in Fe-modified zeolites. Applied Surface Science, 254(13), 4075-4083. https://doi.org/10.1016/j.apsusc.2007.12.060