Abstract
The interaction of cyclohexanone with the Pt(111) surface has been investigated by HREELS and TDS. At 160 K, the chemisorption of cyclohexanone induces a “red-shift” of the CO stretch band and a decrease in work function. Heating the sample from 220 to 370 K leads to complete disappearance of the dominant CH2 rocking band at 720 cm−1 and the CO stretching band at 1650 cm−1, indicating the dehydrogenation of the entire adlayer to form intermediate species. Strong bands of the dehydrogenated species appear at 860 and 3000 cm−1 which is different from phenoxy on Pt(111). Above ∼ 380K, the dehydrogenated species is decomposed to form hydrocarbon fragments and CO which directly desorbs into the vacuum.
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