HREELS studies of ethanol adsorption and decomposition on Rh(100) surface

	HREELS studies of ethanol adsorption and decomposition on Rh(100) surface
	Tian, ZJ; Wei, XM; Zhai, RS; Ren, SZ; Liang, DB; Lin, LW
刊名	CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
	1997-07-01
卷号	18 期号:7 页码:1153-1158
关键词	Adsorption And Decomposition Of Ethanol Rh(100) High Resolution Electron Energy Loss Spectroscopy Thermal Desorption Spectroscopy Oxametallocyclic Intermediate
ISSN号	0251-0790
文献子类	Article
英文摘要	The adsorption and decomposition of ethanol on the clean Rh(100) surface were studied using thermal desorption spectroscopy(TDS) and high resolution electron energy loss spectroscopy (HREELS). At 130 K, on Rh(100) surface, the adsorption started from a chemisorbed ethanol structure which was bonded to the surface through both O and H moieties, with the O-H bond almost parallel to the surfaces. Additional condensed phase of adsorbed ethanol was found to exist through hydrogen bonding. At about 150 K, the multilayer-adsorbed ethanol desorbed from the surfaces, while the remaining chemisorbed ethanol completely converted to an ethoxy species via the first decomposition step in which O-H bond scission occurred. The small amount of methane formed indicated that the dehydrogenation of the ethoxide intermediates on the clean Rh(100) surface was non-selective. Loss of hydrogen from the methylene group would result in the formation of an aldehyde intermediate. Decarbonylation of the aldehyde intermediates produced methane and CO. This pathway appeared to be a minor one for ethoxide decomposition on Rh(100). The main ethoxide dehydrogenation proceeded via the cleavage of a C-H bond on the methyl group, resulting in the formation of an oxametallocyclic intermediate. The loss spectra at similar to 629 cm(-1) is assigned to this intermediate. The C-C bond scission occurred at the same time in the oxametallocyclic dehydrogenation sequence, Then the CO and hydrocarbon moieties were formed on the surface.
WOS关键词	ALCOHOLS ; STABILIZATION ; PATHWAYS ; RH(111) ; ACETATE
WOS研究方向	Chemistry
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:A1997XL89300030
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168262]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	CHINESE ACAD SCI,DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA
推荐引用方式 GB/T 7714	Tian, ZJ,Wei, XM,Zhai, RS,et al. HREELS studies of ethanol adsorption and decomposition on Rh(100) surface[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,1997,18(7):1153-1158.
APA	Tian, ZJ,Wei, XM,Zhai, RS,Ren, SZ,Liang, DB,&Lin, LW.(1997).HREELS studies of ethanol adsorption and decomposition on Rh(100) surface.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,18(7),1153-1158.
MLA	Tian, ZJ,et al."HREELS studies of ethanol adsorption and decomposition on Rh(100) surface".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 18.7(1997):1153-1158.