Hydrolysis at MgO(100)/Ag(100) oxide-metal interfaces studied by O 1s x-ray photoelectron and MgKL23L23 Auger spectroscopy

被引：30

作者：

Altieri, S.

Contri, S. F.

Valeri, S.

机构：

[1] Natl Ctr Nanostruct & Biosyst Surface, CNR, INFM S3, I-41100 Modena, Italy

[2] Univ Modena, Dipartimento Fis, I-41100 Modena, Italy

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.76.205413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using O 1s x-ray photoelectron and Mg KL23L23 Auger spectroscopy, we demonstrate that monolayer MgO(100)/Ag(100) exposed at 300 K to H2O vapor pressure of 10(-8) Torr is strongly hydrated up to 0.8 H2O per MgO formula unit, half of the water molecules being dissociatively adsorbed at the fourfold coordinated surface oxide sites. These dramatic hydrolysis and molecular adsorption phenomena are strikingly different from those observed at perfect bulklike MgO(100) surfaces, and provide strong experimental support to the concept of unprecedented interactions and properties at oxide-metal interfaces.

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页数：7

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共 44 条

[1] Self-inhibition of water dissociation on magnesium oxide surfaces [J].

Abriou, D ;

Jupille, J .

SURFACE SCIENCE, 1999, 430 (1-3) :L527-L532

[2]

Ahmed SIU, 2000, J PHYS CHEM B, V104, P3343

[3] Reduction of Coulomb and charge-transfer energies in oxide films on metals [J].

Altieri, S ;

Tjeng, LH ;

Voogt, FC ;

Hibma, A ;

Sawatzky, GA .

PHYSICAL REVIEW B, 1999, 59 (04) :R2517-R2520

[4] Morphology of H2O dosed monolayer MgO(001)/Ag(001) [J].

Altieri, S ;

Contri, SF ;

Agnoli, S ;

Valeri, S .

SURFACE SCIENCE, 2004, 566 :1071-1075

[5] Charge fluctuations and image potential at oxide-metal interfaces [J].

Altieri, S ;

Tjeng, LH ;

Voogt, FC ;

Hibma, T ;

Rogojanu, O ;

Sawatzky, GA .

PHYSICAL REVIEW B, 2002, 66 (15) :1-6

[6] Ultrathin oxide films on metals: new physics and new chemistry? [J].

Altieri, S ;

Tjeng, LH ;

Sawatzky, GA .

THIN SOLID FILMS, 2001, 400 (1-2) :9-15

[7] Electronic structure and chemical reactivity of oxide-metal interfaces: MgO(100)/Ag(100) [J].

Altieri, S ;

Tjeng, LH ;

Sawatzky, GA .

PHYSICAL REVIEW B, 2000, 61 (24) :16948-16955

[8] Core-level x-ray photoemission on NiO in the impurity limit [J].

Altieri, S ;

Tjeng, LH ;

Tanaka, A ;

Sawatzky, GA .

PHYSICAL REVIEW B, 2000, 61 (20) :13403-13409

[9] A PHOTOELECTRON SPECTROSCOPIC INVESTIGATION OF THE INTERACTION BETWEEN H2O AND OXYGEN ON AG(110) [J].

BARTEAU, MA ;

MADIX, RJ .

SURFACE SCIENCE, 1984, 140 (01) :108-122

[10] Water dissociation on a defective MgO(100) surface: Role of divacancies [J].

Ealet, B ;

Goniakowski, J ;

Finocchi, F .

PHYSICAL REVIEW B, 2004, 69 (19) :195413-1

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