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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 6
BKCSDE 30(6)
June 20, 2009 

 
Title
CO Adsorption on Mo(110) Studied Using Thermal Desorption Spectroscopy (TDS) and Ultraviolet Photoelectron Spectroscopy (UPS)
Author
Taek seung Yang, Hae geun Jee, Jin Hyo Boo, Young Dok Kim*, Soon Bo Lee*
Keywords
Chemisorption, CO, Mo(110), Photoemission spectroscopy
Abstract
This study examined the adsorption of CO on a Mo(110) surface by Thermal Desorption Spectroscopy (TDS) and synchrotron-radiation based photoemission spectroscopy (SRPES). CO desorption was observed at approximately 400 K (α-CO) and > 900 K (β-CO). When CO was exposed to Mo(110) at 100 K, it showed a tilted structure at low CO coverage and a vertical structure after saturation of the tilted CO. After heating the CO-precovered sample to 900 K, a broad peak at 12 eV below the Fermi level was identified in the valence level spectra, which was assigned to either the 4σ-molecular orbital of CO, or 2s of dissociated carbon. TDS results of the β-CO showed a first order desorption. These results are in a good agreement with the observations of CO adsorption on W(110) surfaces.
Page
1353 - 1356
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