Preparation of nanosize Pt clusters using ion exchange of Pt(NH3)(4)(2+) inside mesoporous channel of MCM-41

Cited 48 time in webofscience Cited 50 time in scopus
  • Hit : 488
  • Download : 33
Mesoporous molecular sieve MCM-41 with a Si/Al ratio of 35 was obtained by hydrothermal synthesis using a gel mixture with a molar composition of 6 SiO2 : 0.1 Al2O3 : 1 hexadecyltrimethylammonium chloride : 0.25 dodecyltrimethylammonium bromide : 0.25 tetrapropylammonium bromide : 0.15 (NH4)(2)O : 1.5 Na2O : 300 H2O. The MCM-41 sample was calcined in O-2 flow al 813 K and subsequently ion exchanged with Ca2+. A small Pt cluster has been supported on the MCM-41 sample following a procedure using ion exchange of Pt(NH3)(4)(2+). The Pt(NH3)(4)(2+) ion supported on MCM-41 has been activated in O-2 flow at 593 K and subsequently reduced with H-2 flow at 573 K, in the same way used for the preparation of a Pt cluster entrapped inside the supercage of zeolite NaY. The resulting Pt cluster supported on the MCM-41 shows hydrogen chemisorption of total two H atoms per Pt at 296 K (based on the total amount of Pt) and high catalytic activity for hydrogenolysis of ethane. The chemical shift in Xe-129 NMR spectroscopy of adsorbed xenon indicates that the Pt cluster is located inside the mesoporous molecular sieve.
Publisher
BALTZER SCI PUBL BV
Issue Date
1996
Language
English
Article Type
Article
Keywords

ZEOLITE

Citation

CATALYSIS LETTERS, v.37, no.1-2, pp.29 - 33

ISSN
1011-372X
DOI
10.1007/BF00813515
URI
http://hdl.handle.net/10203/12445
Appears in Collection
CH-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 48 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0