Please use this identifier to cite or link to this item:
Title: Hydrogen adsorption on sulfur and nitrogen covered Ru(001) surfaces
Authors: Huang, H.H. 
Seet, C.S.
Xu, G.Q. 
Hrbek, J.A.
Issue Date: 10-Nov-1994
Citation: Huang, H.H.,Seet, C.S.,Xu, G.Q.,Hrbek, J.A. (1994-11-10). Hydrogen adsorption on sulfur and nitrogen covered Ru(001) surfaces. Surface Science 319 (3) : 344-352. ScholarBank@NUS Repository.
Abstract: Hydrogen adsorption on nitrogen- and sulfur-modified Ru(001) surfaces was investigated using X-ray and ultra-violet photoelectron spectroscopies (XPS and UPS), low-energy electron diffraction (LEED) and thermal desorption spectroscopy (TDS). On a S-covered Ru(001), two thermal desorption peaks of hydrogen at 135 and 265 K were clearly observed at sulfur coverages > 0.1, at which p(2 × 2)-S islands start to form. The intensities of these two peaks increase with θS up to 0.21, and then decrease rapidly at higher sulfur coverages. At θS = 0.33, corresponding to a complete ( 3 × 3)R30° LEED pattern, hydrogen adsorption was fully suppressed. Compared with hydrogen desorption from H2S decomposition on Ru(001), it was concluded that the hydrogen desorption peak at 135 K is correlated with the formation of p(2 × 2)-S unit cells. Our experiments further demonstrate that preadsorbed N-atoms also inhibit the adsorption of hydrogen with each N-adatom blocking four hydrogen adsorption sites. © 1994.
Source Title: Surface Science
ISSN: 00396028
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

checked on Sep 7, 2019

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.