Kinetics of low-temperature CO oxidation on Au(111)
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- 作者：Theodore Thueninga ; Joshua Walkera ; Heather Adamsa ; Octavio Furlongb ; Wilfred T. Tysoea ; wtt@uwm.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Au(111) ; Oxygen ; Carbon monoxide ; Temperature-programmed desorption ; Reflection-absorption infrared spectroscopy
- 刊名：Surface Science
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：648
- 期：Complete
- 页码：236-241
- 全文大小：640 K
文摘
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CO adsorption and oxidation were observed on a Au(111) single crystal dosed with oxygen via exposure to ozone.
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Adsorbed oxygen and CO react stoichiometrically over a range of exposures at low temperature.
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Two distinct CO states were observed in RAIRS and TPD, attributed to adsorption on Au0 and Auδ + sites.
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Oxidation proceeds at low temperatures (< 300 K) compared to other transition-metal catalysts with an activation energy between ~ 32 and 56 kJ/mol.