Femtosecond versus nanosecond surface photochemistry: O2+CO on Pt(111) at 80 K

F. J. Kao*, D. G. Busch, D. Gomes Da Costa, W. Ho

*此作品的通信作者

研究成果: Article同行評審

103 引文 斯高帕斯(Scopus)

摘要

Desorption of O2 and production of CO2 from O2 coadsorbed with CO on Pt(111) at 80 K were induced by laser pulses of femtosecond and nanosecond durations. The photoyields with femtosecond pulses show highly nonlinear dependence on fluence, large enhancement of cross section, and increase of the O2 desorption to CO2 production branching ratio, when compared with desorption and reaction induced by nanosecond pulses. These differences are attributed to multiple excitations occuring within the time scale of relaxation of the excited adsorbate-surface comples, which are possible with high intensity femtosecond pulse laser irradiation.

原文English
頁(從 - 到)4098-4101
頁數4
期刊Physical Review Letters
70
發行號26
DOIs
出版狀態Published - 1993

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