Download Oxide-based Systems at the Crossroads of Chemistry, Second by C. Colella, S. Coluccia, Aldo Gamba PDF

By C. Colella, S. Coluccia, Aldo Gamba

This quantity comprises papers provided on the moment foreign Workshop on Oxide-based structures on the Crossroads of Chemistry, held at Villa Olmo in Como, Italy, 8-11 October.The chosen papers current the highlights of contemporary learn within the box of oxide constitution. quite a lot of oxidic fabrics, together with genuine oxides, zeolites and layer-structured platforms, is taken into account and defined when it comes to instruction tools, structural characterization and the relation among lively websites, constitution and catalytic houses. the applying of the main robust simulation and physical-chemical ideas convey their usefulness in researching and explaining structural and dynamic houses of complicated fabrics. additionally the improvement of subtle spectroscopical and analytical strategies are proven to noticeably enhance the expansion of floor oxide technology, producing new instruments for the information of catalyst constitution and response mechanisms. an enticing function is the inclusion of papers which exhibit the mutual roles of scan and theoretical types.

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It may seem strange that the first Bronsted site involves framework oxygen O 1, which is weakly bonded to 22 cation sites (see Table 4), whereas 03, 0 2 and also 0 4 are strongly bonded to cations; an explanation can be found in the fact that site II is almost fully occupied in dehydrated Y, so that 0 2 and 0 4 cannot host a proton, and the fact that 03 cannot host a proton until both I and I' sites are empty. 02' II' HI W II III 02 Fig. 4. Schematic representation of faujasite structure viewed along [ 111 ].

Carati, F. Villain, G. Vlaic, J. Phys. Chem. B 102 (1998) 6382. L. Marchese, T. Maschmeyer, E. Gianotti, S. Coluccia, and J. M. Thomas, J. Phys. Chem. B, 101 (1997) 8836. This Page Intentionally Left Blank Studies in Surface Science and Catalysis 140 A. Gamba, C. Colella and S. V. 37 Polymer-silica composite membranes for Direct Methanol Fuel Cells V. S. Aric6, E. Modica, P. Creti, P. L. Antonucci* Institute CNR-TAE, Salita S. Lucia sopra Contesse 5, 98126 S. Lucia, Messina, Italy * Dipartimento di Meccanica e Materiali, Universitg di Reggio Calabria, Feo di Vito, 89100 Reggio Calabria, Italy Heteropolyacid-modified polymer silica membranes for Direct Methanol Fuel Cells have been prepared and tested under high temperature operation conditions (145~ in single cell configuration.

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