XAFS Study of HY Zeolite Supported Pt Nanoparticle Catalysts Prepared With Different Methods
- National Synchrotron Radiation Lab, University of Science and Technology of China, 230029, Hefei (China)
The electronic and geometric effects induced by preparation methods on small platinum particles supported on high surface-area zeolite HY were studied by X-ray absorption fine structure (XAFS) spectroscopy. Pt/HY catalysts were prepared by a variety of techniques, including incipient wetness impregnation (IWI) and vapor-phase impregnation (VPI). Results of EXAFS for series of equal loadings of Pt prepared by IWI and VPI showed that the Pt clusters resulting from the VPI preparation had lower Pt--Pt coordination and higher coordination to the zeolite lattice oxygen. The electronic properties and structures of Pt/HY catalysts prepared with IWI approach can be altered by using different Pt precursor solutions.
- OSTI ID:
- 21054728
- Journal Information:
- AIP Conference Proceedings, Vol. 882, Issue 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644642; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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