FEM study of NOW and NO2W adsorption system |
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Authors: | Mieko Sato |
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Institution: | Electrotechnical Laboratory, Sakuramura, Ibaraki, Japan |
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Abstract: | Nitric oxide adsorption on tungsten and nitric dioxide adsorption on tungsten have been investigated by the FEM method. When NO or NO2 adsorbs gradually on W at 300 K and at 80 K, the FEM patterns which appear at first are found to be similar to those which appear in N2 adsorption on W. In the case of NO adsorption on W at 80 K, with further exposure, no further change of the FEM patterns is observed. However, in the cases of NO adsorption on W at 300 K, NO2 adsorption on W at 300 K, and NO2 adsorption on W at 80 K, further changes of the FEM patterns are observed with further exposure, and the FEM pattern which is obtained at the saturated state is found to be similar to the FEM pattern which appears at the saturated state of O2 adsorption on W. From the above results it is suggested that NO and NO2 dissociate on W at 300 and at 80 K. |
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