Characterization of Chromium Doped Raney-nickel Catalysts
(1985) Societes Chimiques Belges. Bulletin — Vol. 94, n° 6, p. 371-377 (1985)
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- Authors
Delannay, Francis 
- Abstract
- Two chromium-doped Raney nickel catalysts have been prepared from Al-Ni-Cr alloys where Cr was introduced in such a way as to substitute for nickel in the Ni2Al3 intermetallic phase. In comparison with the undoped catalysts, the BET and metallic surface areas remain little affected but more aluminium is retained after etching. X.P.S. shows that aluminium and nickel are in the metallic state whereas chromium is completely oxidized. Very large amounts of chromium are found on the surface, which suggests migration of chromium to the surface during leaching. Analytical electron microscopy indicates that the local chromium concentration is not perfectly uniform. Electron probe microanalysis of the precursor alloy reveals the segregation of part of chromium in a separate phase. These results are evaluated in the framework of the available literature data on the microstructure of Raney nickel catalysts.
- Affiliations
Université Catholique de Louvain Groupe de Physico-Chimie Minérale et de Catalyse Université Scientifique et Médicale de Grenoble Laboratoire d'Études Dynamiques et Structurales de la Sélectivité
Citations
Kordulis, C., Doumain, B., Damon, JP., Masson, J., Dallons, JL., & Delannay, F. (1985). Characterization of Chromium Doped Raney-nickel Catalysts. Societes Chimiques Belges. Bulletin, 94(6), 371-377. https://doi.org/10.1002/bscb.19850940602 (Original work published 1985)