Present paper reports on Extended X-rays Absorption Fine Structure (EXAFS) Spectroscopy characterisation of Fe/Pt clusters. Samples of different nominal iron contents (FePt4 and FePt2) have been prepared and characterised by direct measurements of absorption coefficient at Pt L3 and Fe K edges. Catalysts were prepared by precipitation from suitable mixing (in the appropriate stoichiometry) of mesitylene suspensions containing small clusters of either platinum or iron. Single species suspension, in turn, were prepared by vapor metal deposition. Catalytic activity of prepared samples was tested on cinnamic aldehyde. As a general result, platinum clusters exhibit activity in the hydrogenation of both carbon double bond and aldehyde group with a preference for the latter. Iron addition to the pure platinum catalyst reverts the selectivity while leaving the catalytic activity almost unchanged. The present paper represents a temptative to achieve structural information on Fe and Pt short range environments, thus providing insights on the dynamics of the catalytic process.
|Publication status||Published - 1998|
|Event||Proceedings of the 1997 MRS Fall Symposium - , Unknown|
Duration: 1 Jan 1998 → …
|Conference||Proceedings of the 1997 MRS Fall Symposium|
|Period||1/1/98 → …|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
D'Agostino, G., Filipponi, A., Verrazzani, A., & Vitulli, G. (1998). On extended x-rays absorption fine structure characterisation of iron platinum clusters. Paper presented at Proceedings of the 1997 MRS Fall Symposium, Unknown.