GIST Scholar
College of Natural Sciences
Department of Physics and Photon Science
1. Journal Articles
In Situ Ambient Pressure XPS Study of CO Oxidation Reaction on Pd(111) Surfaces
- Type
- Article
- Citation
- Journal of Physical Chemistry C, v.116, no.35, pp.18691 - 18697
- Issued Date
- 2012-09
- Abstract
- The CO oxidation reaction on the Pd(111) model catalyst at various temperatures (200-400 degrees C) under hundreds mTorr pressure conditions has been monitored by in situ ambient pressure X-ray photoelectron spectroscopy and mass spectroscopy. In situ observation of the reaction revealed that the Pd(111) surface is covered by CO molecules at a lower temperature (200 degrees C), while at higher temperatures (300-400 degrees C) several oxide phases are formed on the surface. We found that the reactivity is enhanced in the presence of a surface oxide and significantly suppressed by formation of a cluster oxide and the PdO bulk oxide. CO titration experiments suggest that less coordinated oxygen atoms are more reactive for CO oxidation.
- Publisher
- AMER CHEMICAL SOC
- ISSN
- 1932-7447
- Appears in Collections:
- Department of Physics and Photon Science > 1. Journal Articles
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