Abstract
CO adsorption on as-deposited, nitrided and oxidized Fe Ru(001) surfaces was investigated using high resolution electron energy loss spectroscopy (HREELS), temperature programmed desorption (TPD), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). The behaviour of CO on Fe Ru(001) was compared to that on low Miller index planes of an Fe single crystal. It was found that the as-deposited Fe(1 ML) Ru(001) surface resembles the Fe(110) surface. A single CO species with a ν(C−O) of 1860–1990 cm −1 was found on the as-deposited surface. A new molecular adsorption state appeared on the annealed Fe Ru(001) surface. This species has a higher C−O stretching frequency and a higher desorption temperature than the other species. The effects of nitridation and oxidation of Fe Ru(001) on CO adsorption were also investigated.
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