Imaging Nanostructural Modifications Induced by Electronic Metal鈭扴upport Interaction Effects at Au||Cerium-Based Oxide Nanointerfaces
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- 作者：Miguel L贸pez-Haro ; Jos茅 M. C铆es ; Susana Trasobares ; Jos茅 A. P茅rez-Omil ; Juan J. Delgado ; Seraf铆n Bernal ; Pascale Bayle-Guillemaud ; Odile St茅phan ; Kenta Yoshida ; Edward D. Boyes ; Pratibha L. Gai ; Jos茅 J. Calvino
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：August 28, 2012
- 年：2012
- 卷：6
- 期：8
- 页码：6812-6820
- 全文大小：496K
- 年卷期：v.6,no.8(August 28, 2012)
- ISSN：1936-086X
文摘
A variety of advanced (scanning) transmission electron microscopy experiments, carried out in aberration-corrected equipment, provide direct evidence about subtle structural changes taking place at nanometer-sized Au||ceria oxide interfaces, which agrees with the occurrence of charge transfer effects between the reduced support and supported gold nanoparticles suggested by macroscopic techniques. Tighter binding of the gold nanoparticles onto the ceria oxide support when this is reduced is revealed by the structural analysis. This structural modification is accompanied by parallel deactivation of the CO chemisorption capacity of the gold nanoparticles, which is interpreted in exact quantitative terms as due to deactivation of the gold atoms at the perimeter of the Au||cerium oxide interface.