CO Oxidation on Gold-Supported Iron Oxides: New Insights into Strong Oxide鈥揗etal Interactions

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• 作者：Liang Yu ; Yun Liu ; Fan Yang ; Jaime Evans ; Jos茅 A. Rodriguez ; Ping Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 23, 2015
• 年：2015
• 卷：119
• 期：29
• 页码：16614-16622
• 全文大小：584K
• ISSN：1932-7455

文摘

Very active FeO_x鈥揂u catalysts for CO oxidation are obtained after depositing nanoparticles of FeO, Fe₃O₄, and Fe₂O₃ on a Au(111) substrate. Neither FeO nor Fe₂O₃ is stable under the reaction conditions. Under an environment of CO/O₂, they undergo oxidation (FeO) or reduction (Fe₂O₃) to yield nanoparticles of Fe₃O₄ that are not formed in a bulk phase. Using a combined experimental and theoretical approach, we show a strong oxide鈥搈etal interaction (SOMI) between Fe₃O₄ nanostructures and Au(111), which gives the oxide special properties, allows the formation of an active phase, and provides a unique interface to facilitate a catalytic reaction. Our work highlights the important role that the SOMI can play in enhancing the catalytic performance of the oxide component in metal鈥搊xide catalysts.