The influence of framework-gallium in zeolites: Electronegativity and infrared spectroscopic study
β Scribed by D.H. Dompas; W.J. Mortier; O.C.H. Kenter; M.J.G. Janssen; J.P. Verduijn
- Book ID
- 113180199
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 302 KB
- Volume
- 129
- Category
- Article
- ISSN
- 0021-9517
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π SIMILAR VOLUMES
Deuteration of Bronsted acidic sites in zeolites gives observable infrared in-plane O-D bending modes. For zeolite Y and ZK-5, a maximum near 870 cm-' with a shoulder near 890 cm-' is observed. These signals arc related to, respectively, the highfrequency and the low-frequency stretching modes. Mord
X-ray absorption ( XANES and EXAFS ) at the Ga K-edge and the Pt L-edge was used to monitor the variation of chemical states of gallium and platinum under in situ redox treatments in Pt/Ga/H-beta zeolites prepared by incipient wetness impregnation. It was found that the Ga species exist mainly as is