Comparative Study of Formation and Stabilization of Gold and Silver Clusters and Nanoparticles in Mordenites

N. Bogdanchikova, I. Tuzovskaya, A. Pestryakov, A. Susarrey-Arce

Результат исследований: Материалы для журналаСтатья

5 Цитирования (Scopus)

Аннотация

Supporting silver and gold on mordenites by ion-exchange method with further reduction with H 2 leads to formation of neutral and charged metal clusters inside zeolite channels as well as metal nanoparticles on external surface of mordenite. A portion of the cluster states of the metals and stability of the clusters depend strongly on acidity of zeolite (determined by SiO 2/Al 2O 3molar ratio) and nature of zeolite cation (H +, Na +, NH + 4 ). The investigations of silver and gold samples after prolonged storage for 6 and 12 months revealed that silver clusters are comparatively stable while oxidation of gold clusters and nanoparticles by air is the probable cause of deactivation of gold catalysts. The comparison of the results for Au and Ag samples allow suggesting NaM15 and NaM24 mordenites for effective synthesis of complex Au-Ag clusters as active and stable species of catalytic reactions occurring at room temperature.

Язык оригиналаАнглийский
Страницы (с-по)5476-5482
Число страниц7
ЖурналJournal of Nanoscience and Nanotechnology
Том11
Номер выпуска6
DOI
СостояниеОпубликовано - июн 2011

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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