Infrared Spectra of Chemisorbed CO on Rh.
Abstract
The chemisorption of CO on transition metals has been studied by many physical techniques in an effort to understand the molecular and electronic character of the adsorbed species. The surface measurement techniques at our disposal range from those useful for studying adsorbed layers on single crystal surfaces to other techniques which may be more readily applied to metal adsorbents which are highly dispersed on inert, high area, supports. It is the latter class of surfaces which more closely resemble heterogeneous catalysts used in practice, and in fact the ability to disperse precious metals has been of major importance in enhancing their usefulness as catalysts. While the study of single crystal adsorbents represents a limit of refinement in one direction (e.g., high-purity substrates, well-defined atomic periodicity and electronic character, etc.), dispersed metal catalysts can in principle achieve a limiting case in the opposite direction (atomic dispersal to the limit of single isolated metal atoms). Comparisons between chemisorbed CO on single metal atoms (or small metal clusters) and the vast literature of metal carbonyl chemistry have often been made. Such comparisons are often extended to single crystals containing chemisorbed CO.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA062248
Entities
People
- J. T. Yates Jr.
- R. W. Vaughan
- S. D. Worley
- T. M. Duncan
Organizations
- National Institute of Standards and Technology