The Chemisorption of Carbon Monoxide on a Co(10&1macr;0) Single Crystal Surface. Studied by LEED, UPS, EELS, AES and Work Function Measurements

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Abstract
The chemisorption of CO on Co(10&1macr;0) has been investigated by LEED, UPS, EELS, Auger and sp measurements. CO is molecularly adsorbed between 100 and 420 K. This can be deduced from UP spectra, EEL spectra and the reversibility of the sp and the LEED results. The initial isosteric heat of adsorption has a value of about 145 kJ/mol and drops to about 120 kJ/mol when a p(2 × 1) overlayer structure is completed. The final structure obtained at 300 K is a well ordered c(2 × 1) CO overlayer.