Surface-embedded oxygen: Electronic structure of Ag(111) and Cu(poly) oxidized at atmospheric pressure

	Surface-embedded oxygen: Electronic structure of Ag(111) and Cu(poly) oxidized at atmospheric pressure
	SchedelNiedrig, T ; Bao, X ; Muhler, M ; Schlogl, R
刊名	berichte der bunsen-gesellschaft-physical chemistry chemical physics
	1997-07-01
卷号	101 期号:7 页码:994-1006
关键词	adsorption catalysis spectroscopy spectroscopy photoelectron X-ray
英文摘要	we investigated the surface electronic structure of an oxidized ag(111) single crystal and a polycrystalline cu foil prepared under conditions of pressure and temperature (1000 mbar and 900 k) far beyond those used in usual uhv studies. it has recently been shown that a strongly bound oxygen species (o-gamma) apart from oxygen atoms chemisorbed on the surface (o-alpha) or oxygen atoms dissolved in the bulk (o-beta) can be prepared on on silver surfaces. using core-level photoemission we show these three atomic oxygen species, o-alpha, o-beta and o-gamma, exhibit characteristic spectral properties. x-ray absorption spectroscopy at the o k-edge indicates that the formation of the strongly bound o-gamma species is accompanied by a strong hybridization between o2p and ag4d states and that also the ag5sp states are important for the metal-to-oxygen covalent interaction. the reaction with methanol was used to selectively remove the surface-embedded atomic species and to study the effect of the strongly bound oxygen o-gamma species on the valence electronic structure of silver. this separation of the oxygen species did not work for the more reactive copper-oxygen system. the chemical bonding interaction of the novel o-gamma species with silver is discussed in terms of the ligand-field theory emphasizing the covalent character of the interaction. for copper, the spectroscopic analysis is complicated by the existence of a stable oxide cu2o with similar bonding properties of the oxygen than postulated for the surface-embedded species in silver.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	ray-absorption spectroscopy ; transition-metal oxides ; photoelectron-spectroscopy ; fine-structure ; energy-loss ; silver ; adsorption ; oxidation ; cu2o ; diffraction
收录类别	SCI
语种	英语
WOS记录号	WOS:A1997XK58700002
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/142803]
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	1.DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA 2.RUHR UNIV BOCHUM,LEHRSTUHL TECH CHEM,D-44780 BOCHUM,GERMANY
推荐引用方式 GB/T 7714	SchedelNiedrig, T,Bao, X,Muhler, M,et al. Surface-embedded oxygen: Electronic structure of Ag(111) and Cu(poly) oxidized at atmospheric pressure[J]. berichte der bunsen-gesellschaft-physical chemistry chemical physics,1997,101(7):994-1006.
APA	SchedelNiedrig, T,Bao, X,Muhler, M,&Schlogl, R.(1997).Surface-embedded oxygen: Electronic structure of Ag(111) and Cu(poly) oxidized at atmospheric pressure.berichte der bunsen-gesellschaft-physical chemistry chemical physics,101(7),994-1006.
MLA	SchedelNiedrig, T,et al."Surface-embedded oxygen: Electronic structure of Ag(111) and Cu(poly) oxidized at atmospheric pressure".berichte der bunsen-gesellschaft-physical chemistry chemical physics 101.7(1997):994-1006.