Bridging the pressure and materials gaps: High pressure sum frequency generation study on supported Pd nanoparticles

被引：137

作者：

Dellwig, T ^{[1
]}

Rupprechter, G ^{[1
]}

Unterhalt, H ^{[1
]}

Freund, HJ ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.85.776

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Infrared-visible sum frequency generation vibrational spectroscopy is applied for the first time to monitor CO stretching vibrations on alumina supported Pd nanoparticles in a pressure range from 10(-7) to 200 mbar. The adsorption behavior of Pd aggregates with 3 and 6 nm mean size is dominated by surface defects and two different adsorption sites (twofold bridging and on-top) were identified. The CO adsorption site occupancy on Pd nanocrystals is mainly governed by the gas phase pressure while the structure of the particles and their temperature have a smaller influence.

引用

页码：776 / 779

页数：4

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