A STUDY OF PLATINUM-SUPPORTED CATALYSTS THROUGH HYPERFINE INTERACTIONS

Authors
SAITOVITCH H SILVA PRJ RODRIGUEZ AM WEBERSZPIL J PASSOS FB SCHMAL M
Citation
H. Saitovitch et al., A STUDY OF PLATINUM-SUPPORTED CATALYSTS THROUGH HYPERFINE INTERACTIONS, Hyperfine interactions, 84(1-4), 1994, pp. 563-567
Citations number
6
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Physics, Nuclear","Physics, Condensed Matter
Journal title
Hyperfine interactions → ACNP
ISSN journal
03043843
Volume
84
Issue
1-4
Year of publication
1994
Pages
563 - 567
Database
ISI
SICI code
0304-3843(1994)84:1-4<563:ASOPCT>2.0.ZU;2-M
Abstract
The effect of indium addition on alumina-supported platinum catalysts was investigated by measurements of hyperfine interactions. Via time d ifferential perturbed angular correlation spectroscopy (TDPAC) on Cd-1 11, Pt/Al2O3 catalysts were studied in the flow of a heptane/H-2 gas s tream. The results indicate that some amount of indium sticks to plati num which is then dispersed on the support surface. The amount of In t hat is free from platinum is mobile under reaction conditions, being c apable of diluting platinum particles and draining off coke precursors from the platinum surface.