Probing Defect Sites on the CeO2 Surface with Dioxygen
Publication type: Journal Article
Publication date: 2004-04-01
scimago Q1
wos Q3
SJR: 0.742
CiteScore: 5.3
Impact factor: 2.9
ISSN: 15206106, 15205207, 10895647
Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry
Abstract
In situ Raman spectroscopy of adsorbed dioxygen was used to characterize electron defects on the surface of nanocrystalline cerium oxide that was partially reduced with H2 and CO. Via 16O/18O isotope substitution, the bands in the range of 1135−1127 and 877−831 cm-1 were assigned to the O−O stretching vibration of dioxygen species bound to one- and two-electron defects on the CeO2 surface to form superoxide (O2-) and peroxide (O22-) species, respectively. A band at 357 cm-1 was attributed to the cerium−oxygen vibration of the adsorbed superoxides, O2-, whereas the bands at 538 and 340 cm-1 were assigned to the asymmetric and symmetric cerium−oxygen vibrations of the surface peroxides, O22-, respectively. The dynamics of the defect annihilation that results from surface reoxidation by adsorbed dioxygen species during temperature-programmed experiments allowed peroxide species adsorbed on isolated and aggregated two-electron defects to be distinguished. A general approach to investigate the reactivity of di...
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Pushkarev V. V., Kovalchuk V. I., d’Itri J. L. Probing Defect Sites on the CeO2 Surface with Dioxygen // Journal of Physical Chemistry B. 2004. Vol. 108. No. 17. pp. 5341-5348.
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Pushkarev V. V., Kovalchuk V. I., d’Itri J. L. Probing Defect Sites on the CeO2 Surface with Dioxygen // Journal of Physical Chemistry B. 2004. Vol. 108. No. 17. pp. 5341-5348.
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TY - JOUR
DO - 10.1021/jp0311254
UR - https://doi.org/10.1021/jp0311254
TI - Probing Defect Sites on the CeO2 Surface with Dioxygen
T2 - Journal of Physical Chemistry B
AU - Pushkarev, Vladimir V
AU - Kovalchuk, Vladimir I
AU - d’Itri, Julie L
PY - 2004
DA - 2004/04/01
PB - American Chemical Society (ACS)
SP - 5341-5348
IS - 17
VL - 108
SN - 1520-6106
SN - 1520-5207
SN - 1089-5647
ER -
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BibTex (up to 50 authors)
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@article{2004_Pushkarev,
author = {Vladimir V Pushkarev and Vladimir I Kovalchuk and Julie L d’Itri},
title = {Probing Defect Sites on the CeO2 Surface with Dioxygen},
journal = {Journal of Physical Chemistry B},
year = {2004},
volume = {108},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/jp0311254},
number = {17},
pages = {5341--5348},
doi = {10.1021/jp0311254}
}
Cite this
MLA
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Pushkarev, Vladimir V., et al. “Probing Defect Sites on the CeO2 Surface with Dioxygen.” Journal of Physical Chemistry B, vol. 108, no. 17, Apr. 2004, pp. 5341-5348. https://doi.org/10.1021/jp0311254.