Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Synchrotron photoemission study of CO chemisorption on Cr(110)

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
Angle-integrated ultraviolet photoemission studies of carbon monoxide chemisorption on Cr(110) confirm the sequential population of two electronically inequivalent molecular binding states (..cap alpha../sub 1//sub -/CO and ..cap alpha../sub 2//sub -/CO) at 90 K. These are distinguished by differences in the CO 4sigma binding energies (..delta..E/sub B/ = 0.8 eV) and photoemission cross sections. Work-function measurements indicate that the surface dipole moment associated with ..cap alpha../sub 1/-CO is significantly less than that for ..cap alpha../sub 2/-CO. CO/O interaction data exhibit oxygen-induced ..cap alpha../sub 1/-CO site blocking and ..cap alpha../sub 1//sub -/CO..--> cap alpha../sub 2/-CO binding mode conversion. These results support current models for the CO binding geometries on Cr(110) and related binding states on Fe (100) and Mo(100).
Research Organization:
Surface Science Division, National Institute of Science and Technology, Gaithersburg, Maryland 20899
OSTI ID:
6886508
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:17; ISSN PRBMD
Country of Publication:
United States
Language:
English