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Title: Adsorption and Reaction of Hydrogen Sulfide on Thin-film Cerium Oxide

Abstract

The adsorption and reaction of hydrogen sulfide, H{sub 2}S, have been studied on cerium oxide thin films that were vapor deposited on Ru(0 0 0 1). The behavior of the H{sub 2}S was examined as a function of Ce oxidation state. H{sub 2}S weakly chemisorbs on fully oxidized CeO{sub 2} desorbing near 155 K. Hydrogen from the H{sub 2}S reacts with the surface O to desorb as water between 200 K and 450 K. When ca. 20% of the Ce{sup 4+} is reduced to Ce{sup 3+} more H{sub 2}S dissociates to -OH and -SH and water is produced near 580 K. When the ceria is ca. 70% reduced, water formation is suppressed and H{sub 2} desorbs near 580 K. S 2p photoelectron spectroscopy indicates the decomposition of H{sub 2}S into -SH and then -S as the sample is annealed from 100 K to 600 K. O 1s photoemission indicated the presence of H{sub 2}O and -OH.

Authors:
 [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
930990
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Surface Science; Journal Volume: 601; Journal Issue: 21
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; ADSORPTION; CERIUM OXIDES; HYDROGEN; HYDROGEN SULFIDES; PHOTOELECTRON SPECTROSCOPY; PHOTOEMISSION; THIN FILMS; WATER

Citation Formats

Mullins, David R, and McDonald, Tom S. Adsorption and Reaction of Hydrogen Sulfide on Thin-film Cerium Oxide. United States: N. p., 2007. Web. doi:10.1016/j.susc.2007.08.007.
Mullins, David R, & McDonald, Tom S. Adsorption and Reaction of Hydrogen Sulfide on Thin-film Cerium Oxide. United States. doi:10.1016/j.susc.2007.08.007.
Mullins, David R, and McDonald, Tom S. Mon . "Adsorption and Reaction of Hydrogen Sulfide on Thin-film Cerium Oxide". United States. doi:10.1016/j.susc.2007.08.007.
@article{osti_930990,
title = {Adsorption and Reaction of Hydrogen Sulfide on Thin-film Cerium Oxide},
author = {Mullins, David R and McDonald, Tom S},
abstractNote = {The adsorption and reaction of hydrogen sulfide, H{sub 2}S, have been studied on cerium oxide thin films that were vapor deposited on Ru(0 0 0 1). The behavior of the H{sub 2}S was examined as a function of Ce oxidation state. H{sub 2}S weakly chemisorbs on fully oxidized CeO{sub 2} desorbing near 155 K. Hydrogen from the H{sub 2}S reacts with the surface O to desorb as water between 200 K and 450 K. When ca. 20% of the Ce{sup 4+} is reduced to Ce{sup 3+} more H{sub 2}S dissociates to -OH and -SH and water is produced near 580 K. When the ceria is ca. 70% reduced, water formation is suppressed and H{sub 2} desorbs near 580 K. S 2p photoelectron spectroscopy indicates the decomposition of H{sub 2}S into -SH and then -S as the sample is annealed from 100 K to 600 K. O 1s photoemission indicated the presence of H{sub 2}O and -OH.},
doi = {10.1016/j.susc.2007.08.007},
journal = {Surface Science},
number = 21,
volume = 601,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}