A series of materials containing 1.7 wt% Pt and with Pt/Sn atomic ratios varying from 2.25 to 0.6 were prepared using NaY support. The method used to form PtSn bimetallic is based on the reaction of tetramethyltin with hydrogen covering performed Pt particles. Different techniques such as H2 chemisorption, CO chemisorption, IR spectroscopy, TEM and STEM-EDX analysis, and XPS were used to characterize these materials. It appears that H2, and CO chemisorption are depressed with the addition of tin and that part of the tin is alloyed with Pt to form a bimetallic. The bimetallics so formed are rather heterogeneous; neither CO chemisorption and IR spectroscopy nor XPS gives clear evidence of a possible change in the electronic properties of Pt with the addition of tin.

Studies on PtxSny Bimetallics in NaY I. Preparation and Characterization / P. Meriaudeau, C. Naccache, A. Thangaraj, C.L. Bianchi, R. Carli, V. Vishvanathan, S. Narayanan. - In: JOURNAL OF CATALYSIS. - ISSN 0021-9517. - 154:2(1995), pp. 345-354.

Studies on PtxSny Bimetallics in NaY I. Preparation and Characterization

C.L. Bianchi;
1995

Abstract

A series of materials containing 1.7 wt% Pt and with Pt/Sn atomic ratios varying from 2.25 to 0.6 were prepared using NaY support. The method used to form PtSn bimetallic is based on the reaction of tetramethyltin with hydrogen covering performed Pt particles. Different techniques such as H2 chemisorption, CO chemisorption, IR spectroscopy, TEM and STEM-EDX analysis, and XPS were used to characterize these materials. It appears that H2, and CO chemisorption are depressed with the addition of tin and that part of the tin is alloyed with Pt to form a bimetallic. The bimetallics so formed are rather heterogeneous; neither CO chemisorption and IR spectroscopy nor XPS gives clear evidence of a possible change in the electronic properties of Pt with the addition of tin.
Settore CHIM/04 - Chimica Industriale
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/182887
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