IR spectroscopic observation of molecular transport through Pt@CoO yolk-shell nanostructures

被引：70

作者：

Kim, Sunhee

Yin, Yadong

Alivisatos, A. Paul

Somorjai, Gabor A.

Yates, John T., Jr. ^{[1
]}

机构：

[1] Univ Pittsburgh, Ctr Surface Sci, Dept Chem, Pittsburgh, PA 15260 USA

[2] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 30期

关键词：

D O I：

10.1021/ja072588g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

FTIR spectroscopy has been used to monitor the transport of CO to the Pt cores of Pt@CoO nanoparticles forming CO/Pt species. It was found that external Pt sites are not present on the outer surfaces of the similar to 10 nm diameter nanostructures and that CO transports to Pt adsorption sites by an activated surface diffusion process through the CoO shells surrounding similar to 2 nm diameter Pt cores. The CO transport process is not due to gas-phase transport below 300 K. The weakly bound adsorbed CO/CoO species responsible for transport was directly observed at similar to 2147 cm(-1) during transport through the CoO shells.

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页码：9510 / 9513

页数：4

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