The adsorption and reaction of cyclohexanone on the Pt(111) surface

[摘要] 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 C=O 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 C=O 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 similar to 380 K, the dehydrogenated species is decomposed to form hydrocarbon fragments and C=O which directly desorbs into the vacuum. (C) 1997 Elsevier Science B.V.

[发布日期] 1997-04-10

[关键词] chemisorption;electron energy loss spectroscopy;keytones;platinum;thermal desorption spectroscopy;vibrations of adsorbed molecules