XPS characterization of silver exchanged ETS-10 and mordenite molecular sieves.
Silver exchanged molecular sieves ETS-10 (Ag-ETS-10) and mordenite (Ag-mordenite) were dehydrated under vacuum at temperatures between 100 degrees C-350 degrees C. Changes in the state of the silver were studied using X-ray photoelectron spectroscopy (XPS). Silver cations in titanosilicate Ag-ETS-10 are fully reduced to Ag(0) at temperatures as low as 150 degrees C. The characteristic features of the XPS spectrum of silver in this Ag-ETS-10 species correspond to only metallic silver. The signal for metallic silver is not observed in the XPS spectrum of aluminosilicate Ag-mordenite, indicating that silver cations are not reduced, even after heating to 350 degrees C.
Anson
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A
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 266, Canada.
Maham
Y
Y
Lin
C C H
CC
Kuznicki
T M
TM
Kuznicki
S M
SM