Adsorption of water on Cu2O and Al2O3 thin

被引：126

作者：

Deng, Xingyi ^{[1
]}

Herranz, Tirma ^{[1
]}

Weis, Christoph ^{[1
]}

Bluhm, Hendrik ^{[2
]}

Salmeron, Miquel ^{[1
,3
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 26期

关键词：

D O I：

10.1021/jp800944r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The initial stages of water condensation, approximately 6 molecular layers, on two oxide surfaces, Cu2O and Al2O3, have been investigated by using ambient pressure X-ray photoelectron spectroscopy at relative humidity values (RH) from 0 to > 90%. Water adsorbs first dissociatively on oxygen vacancies producing adsorbed hydroxyl groups in a stoichiometric reaction: O-lattic + vacancies + H2O = 2OH. The reaction is completed at similar to 1% RH and is followed by adsorption of molecular water. The thickness of the water film grows with increasing RH. The first monolayer is completed at similar to 15% RH on both oxides and and is followed by a second layer at 35-40% RH. At 90% RH, about 6 layers of H2O film have been formed on Al2O3.

引用

页码：9668 / 9672

页数：5

共 32 条

[1] Bridging the pressure gap in water and hydroxyl chemistry on metal surfaces: The Cu(110) case [J].

Andersson, Klas ;

Ketteler, Guido ;

Bluhm, Hendrik ;

Yamamoto, Susumu ;

Ogasawara, Hirohito ;

Pettersson, Lars G. M. ;

Salmeron, Miquel ;

Nilsson, Anders .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (39) :14493-14499

[2] THE ADSORPTION OF WATER AND OXYGEN ON AG(110) - A STUDY OF THE INTERACTIONS AMONG WATER-MOLECULES, HYDROXYL-GROUPS, AND OXYGEN-ATOMS [J].

BANGE, K ;

MADEY, TE ;

SASS, JK ;

STUVE, EM .

SURFACE SCIENCE, 1987, 183 (03) :334-362

[3]

BANGE K, 1984, SURF SCI, V137, P138

[4] ADSORPTION OF H2O ON CLEAN AND OXYGEN-PREDOSED NI(110) [J].

BENNDORF, C ;

MADEY, TE .

SURFACE SCIENCE, 1988, 194 (1-2) :63-91

[5] Soft X-ray microscopy and spectroscopy at the molecular environmental science beamline at the Advanced Light Source [J].

Bluhm, H ;

Andersson, K ;

Araki, T ;

Benzerara, K ;

Brown, GE ;

Dynes, JJ ;

Ghosal, S ;

Gilles, MK ;

Hansen, HC ;

Hemminger, JC ;

Hitchcock, AP ;

Ketteler, G ;

Kilcoyne, ALD ;

Kneedler, E ;

Lawrence, JR ;

Leppard, GG ;

Majzlan, J ;

Mun, BS ;

Myneni, SCB ;

Nilsson, A ;

Ogasawara, H ;

Ogletree, DF ;

Pecher, K ;

Salmeron, M ;

Shuh, DK ;

Tonner, B ;

Tyliszczak, T ;

Warwick, T ;

Yoon, TH .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 2006, 150 (2-3) :86-104

[6] Methanol oxidation on a copper catalyst investigated using in situ X-ray photoelectron spectroscopy [J].

Bluhm, H ;

Hävecker, M ;

Knop-Gericke, A ;

Kleimenov, E ;

Schlögl, R ;

Teschner, D ;

Bukhtiyarov, VI ;

Ogletree, DF ;

Salmeron, M .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (38) :14340-14347

[7] Imaging water dissociation on TiO2(110) -: art. no. 266103 [J].

Brookes, IM ;

Muryn, CA ;

Thornton, G .

PHYSICAL REVIEW LETTERS, 2001, 87 (26) :266103-1

[8] Hydrogen bonding in mixed OH+H2O overlayers on Pt(111) -: art. no. 046102 [J].

Clay, C ;

Haq, S ;

Hodgson, A .

PHYSICAL REVIEW LETTERS, 2004, 92 (04) :4

[9] Intact and dissociative adsorption of water on Ru(0001) [J].

Clay, C ;

Haq, S ;

Hodgson, A .

CHEMICAL PHYSICS LETTERS, 2004, 388 (1-3) :89-93

[10] The surface science of titanium dioxide [J].

Diebold, U .

SURFACE SCIENCE REPORTS, 2003, 48 (5-8) :53-229

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