MOSSBAUER EFFECT SPECTRA OF AMMONIA ADSORPTION ON A SUPPORTED IRON CATALYST
Abstract
A catalyst was prepared by impregnating silica gel with sufficient ferric nitrate solution enriched with Fe-57 to produce a 3% sample of iron on silica gel. The sample was calcined and then reduced with hydrogen at 450C. The Mossbauer of this sample consisted of three peaks apparently produced by the superposition of two doublets having quadrupole splittings of 1.64 mm/sec for one and 0.99 mm/sec for the other. On adsorption of ammonia the middle peak almost vanishes, but the spectrum is recovered by outgassing at elevated temperatures. The results suggest that the sample is a mixed ferrous-ferric oxide on the surface of the silica gel and that on chemisorption the ammonia complexes into the d orbitals of the ferric ions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 17, 1967
- Accession Number
- AD0660308
Entities
People
- M. C. Hobson Jr