Strong Metal–Support Interactions between Gold Nanoparticles and Nonoxides

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• 作者：Hailian Tang ; Jiake Wei ; Fei Liu ; Botao Qiao ; Xiaoli Pan ; Lin Li ; Jingyue Liu ; Junhu Wang ; Tao Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：138
• 期：1
• 页码：56-59
• 全文大小：293K
• ISSN：1520-5126

文摘

The strong metal–support interaction (SMSI) is of great importance for supported catalysts in heterogeneous catalysis. We report the first example of SMSI between Au nanoparticles (NPs) and hydroxyapatite (HAP), a nonoxide. The reversible encapsulation of Au NPs by HAP support, electron transfer, and changes in CO adsorption are identical to the classic SMSI except that the SMSI of Au/HAP occurred under oxidative condition; the opposite condition for the classical SMSI. The SMSI of Au/HAP not only enhanced the sintering resistance of Au NPs upon calcination but also improved their selectivity and reusability in liquid-phase reaction. It was found that the SMSI between Au and HAP is general and could be extended to other phosphate-supported Au systems such as Au/LaPO₄. This new discovery may open a new way to design and develop highly stable supported Au catalysts with controllable activity and selectivity.