Adsorption of gases on ruthenium field emitters III. The interaction of hydrogen and carbon monoxide

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Abstract
The mutual displacement and the interaction of hydrogen and carbon monoxide on ruthenium field emitters have been studied under ultra‐high vacuum conditions. While a surface saturated with CO does not take up hydrogen from the gas phase, strong interactional effects and displacement, as shown by work function changes different from those produced by the single gases and by an increase of binding energy, are found when a surface precovered with hydrogen is exposed to CO. The interaction is much smaller, when partly CO‐covered surfaces are exposed to hydrogen. It is believed that complexes consisting of both gases are formed, which change upon heating. The relevance of these findings to catalytic reactions on Ru is discussed.

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