ISSN:
1572-879X
Keywords:
CO hydrogenation by rhodium
;
EXAFS study of rhodium
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The activity for the production of methane in the hydrogenation of carbon oxides has been measured over rare earth oxide (Ln = La, Ce, Sm, Yb, Lu) promoted Rh/Al2O3 catalysts in a fixed bed flow reactor at atmospheric pressure. The catalyst structures have been determined by EXAFS experiments at the K edge of the rhodium metal. From the EXAFS data it is concluded that the average coordination number of rhodium depends on the rare earth cation used as promoter. The Rh average coordination number follows the trend obtained from CO chemisorption data. The correlation of the activity results with the structural data demonstrates that the activity towards methane production decreases on increasing the metal dispersion, this being the main effect the promoter causes on the rhodium catalyst.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00769501
