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首页> 美国政府科技报告 >Studies of intermediates, in catalytic reactions, catalysts and catalytic combustion using laser and mass spectrometry.
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Studies of intermediates, in catalytic reactions, catalysts and catalytic combustion using laser and mass spectrometry.

机译：使用激光和质谱法研究中间体，催化反应，催化剂和催化燃烧。

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We have in this project focused our research on a study of the most simple model reaction, that includes OH-radicals, which is the oxidation of hydrogen to water on a metal catalyst. The OH radical is formed at the surface of the catalyst when molecular hydrogen and oxygen first dissociate at the surface and then recombine to OH, which are consumed in the water formation. The OH radical is very short-lived and the concentration is therefore low. If the catalyst is kept at a high temperature (> 1000 K) there is a small possibility that OH radicals desorb from the catalyst before being consumed in the water production. The OH radical has been detected and characterized with respect to its yield, activation energy for desorption and rotational energy using the laser-induced fluorescence technique (LIF). The project also includes space resolved studies of the OH radical outside the catalytic foil using imaging of the fluorescence light from the OH radicals with a diode array and CCD camera. In this study the desorption angle, rotational cooling of the reactants, possible gas phase reactions and different effects of the flow of the OH radicals are investigated. Further, impurities of the catalysts have been analyzed using the Laser Ionization Mass Spectrometry technique.

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