Phonon- versus electron-mediated desorption and oxidation of CO on Ru(0001)

被引：417

作者：

Bonn, M ^{[1
]}

Funk, S ^{[1
]}

Hess, C ^{[1
]}

Denzler, DN ^{[1
]}

Stampfl, C ^{[1
]}

Scheffler, M ^{[1
]}

Wolf, M ^{[1
]}

Ertl, G ^{[1
]}

机构：

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

来源：

SCIENCE | 1999年 / 285卷 / 5430期

关键词：

D O I：

10.1126/science.285.5430.1042

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Heating of a ruthenium surface on which carbon monoxide and atomic oxygen are coadsorbed leads exclusively to desorption of carbon monoxide. In contrast, excitation with femtosecond infrared laser pulses enables also the formation of carbon dioxide. The desorption is caused by coupling of the adsorbate to the phonon bath of the ruthenium substrate, whereas the oxidation reaction is initiated by hot substrate electrons, as evidenced by the observed subpicosecond reaction dynamics and density functional calculations. The presence of this laser-induced reaction pathway allows elucidation of the microscopic mechanism and the dynamics of the carbon monoxide oxidation reaction.

引用

页码：1042 / 1045

页数：4

共 27 条

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