Bridging the pressure gap: Can we get local quantitative structural information at 'near-ambient' pressures?

SURFACE SCIENCE

卷:652

Article

Woodruff, D. P.¹ 

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

关键词: Surface structure;    Ambient pressure;    Molecular adsorbates;    Reaction intermediates;   

DOI  :  10.1016/j.susc.2015.12.007

来源: Elsevier

【 摘 要 】

In recent years there have been an increasing number of investigations aimed at 'bridging the pressure gap' between UHV surface science experiments on well-characterised single crystal surfaces and the much higher (ambient and above) pressures relevant to practical catalyst applications. By applying existing photon-in/photon-out methods and developing instrumentation to allow photoelectron emission to be measured in higher-pressure sample environments, it has proved possible to obtain surface compositions and spectroscopic fingerprinting of chemical and molecular states of adsorbed species at pressures up to a few millibars. None of these methods, however, provide quantitative structural information on the local adsorption sites of isolated atomic and molecular adsorbate species under these higher-pressure reaction conditions. Methods for gaining this information are reviewed and evaluated. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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