HREELS study on coadsorption of oxygen and cyclohexanone on the Pt(111) surface

被引：0
|
作者：
Wang, YS
Wei, XM
Ren, SZ
Zhai, RS
Zhao, YK
Wang, XF
Zhuang, SX [1 ]
机构：
[1] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 1998年 / 43卷 / 15期
关键词：
cyclohexanone; coadsorption; Pt(111) surface; HREELS;
D O I：
10.1007/BF02884141
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The coadsorption of cyclohexanone and oxygen on Pt(lll) has been investigated by HREELS and TDS. At 205 K the presence of oxygen induces an "extra" red-shift of the C = O stretching of coadsorbed cyclohexanone. Heating this coadsorbed surface from 205 to 250 K leads to further dehydrogenation to form intermediate species and to complete disappearance of the C = O stretching band. Above 300 K, the molecule rings of dehydrogenation species cleave to form hydrocarbon fragments and CO molecules which directly desorb into the vacuum or react with preadsorbed oxygen to produce CO2 which leave the surface immediately. TDS results provide further evidence that the preadsorbed oxygen promotes the decomposition of cyclohexanone.
引用
收藏
页码：1276 / 1280
页数：5
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