SANKAR, G and THOMAS, JM and CHEN, J and WRIGHT, PA and BARRETT, PA and GREAVES, GN and CATLOW, CRA (1995) EXAFS INVESTIGATION OF DIVALENT METAL-ION SUBSTITUTED ALPOS. In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. (pp. 37 - 40). ELSEVIER SCIENCE BV
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Abstract
Divalent metal ions, cobalt and zinc, substituted in three aluminophosphates structures (MeAPO-5, -18 and -36) have been characterised by EXAFS. The local structure of the three as-prepared materials were closely similar irrespective of the framework structure for the same concentration of Me(2+) ion. The Co-O bond distances are sensitive to the degree of oxidation of the heteroatom in the cobalt-substituted materials, increasing in the order: CoAPO-18 < CoAPO-36 < CoAPO-5 EXAFS analysis suggests that, in the reduced catalysts (CoAPO-18 and calcined ZnAPO-18), there are three short and one long bond associated with Me(2+)-O of the Bronsted acid centre.
| Type: | Proceedings paper |
|---|---|
| Title: | EXAFS INVESTIGATION OF DIVALENT METAL-ION SUBSTITUTED ALPOS |
| Event: | 1st European Conference on Synchrotron Radiation in Materials Science |
| Location: | CHESTER, ENGLAND |
| Dates: | 1994-07-03 - 1994-07-08 |
| Keywords: | BRIDGING HYDROXYL-GROUPS, COMPUTER-SIMULATION, MOLECULAR-SIEVES, CATALYST |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry |
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