The Synergy between Metal Facet and Oxide Support Facet for Enhanced Catalytic Performance: The Case of Pd–TiO2

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• 作者：Muhan Cao ; Zeyuan Tang ; Qipeng Liu ; Yong Xu ; Min Chen ; Haiping Lin ; Youyong Li ; Elad Gross ; Qiao Zhang
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：August 10, 2016
• 年：2016
• 卷：16
• 期：8
• 页码：5298-5302
• 全文大小：404K
• 年卷期：0
• ISSN：1530-6992

文摘

The demand for catalyst with higher activity and higher selectivity is still a central issue in current material science community. On the basis of first-principles calculations, we demonstrate that the catalytic performance of the Pd–TiO₂ hybrid nanostructures can be selectively promoted or depressed by choosing the suitable shaped Pd and TiO₂ nanocrystals. To be more specific, the catalytic activities of Pd nanoparticles enclosed by (100) or (111) facets can be promoted more significantly when dosed on the TiO₂(001) than on TiO₂(101) under irradiation. Such theoretical prediction has then been further verified by the experimental observations in which the Pd(100)–TiO₂(001) composites exhibit the highest catalytic performance toward the activation of oxygen among all the other shaped hybrid nanostructures. As a result, the selection of facets of support materials can provide an extra tuning parameter to control the catalytic activities of metal nanoparticles. This research opened up a new direction for designing and preparing catalysts with enhanced catalytic performance.