Electron beam induced transformation of MoO3 to MoO2 and a new phase MoO

被引：72

作者：

Wang, D ^{[1
]}

Su, DS ^{[1
]}

Schlögl, R ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2004年 / 630卷 / 07期

关键词：

electron diffraction; high-resolution electron microscopy; electron energy-loss spectroscopy; molybdenum oxide; electron irradiation;

D O I：

10.1002/zaac.200400052

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The transformation of MoO3 induced by electron beam irradiation was studied by electron energy-loss spectroscopy (EELS) in combination with electron diffraction and high-resolution transmission electron microscopy (HRTEM) techniques. The routes of structure transformation were dependent on the applied electron current density. In case of low current density, MoO2 was obtained. In case of high current density, MoO with a rock-salt structure is suggested to be the final phase. The change in oxidation states of the Mo oxides was deduced from the features in energy-loss near edge structure (ELNES) of the O K-edge. Quantitative analysis was successfully employed on Mo M-3-edge and O K-edge to obtain the O/Mo ratio of the reduced phases. The mechanisms of different structure transformation behaviors were suggested in the frame of radiolysis enhanced diffusion.

引用

页码：1007 / 1014

页数：8

共 22 条

[1] X-RAY AND ELECTRON-MICROSCOPY INVESTIGATION OF THE TOPOTACTIC TRANSFORMATION OF MOO3 INTO MOO2 [J].

BERTRAND, O ;

DUFOUR, LC .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1980, 60 (02) :507-519

[2] ELECTRON-IRRADIATION DAMAGE IN OXIDES [J].

BUCKETT, MI ;

STRANE, J ;

LUZZI, DE ;

ZHANG, JP ;

WESSELS, BW ;

MARKS, LD .

ULTRAMICROSCOPY, 1989, 29 (1-4) :217-227

[3] CRYSTALLOGRAPHIC SHEAR IN MOLYBDENUM TRIOXIDE [J].

BURSILL, LA .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1969, 311 (1505) :267-&

[4]

CROZIER PA, 1989, I PHYS C SER, V98, P227

[5] OXYGEN 1S X-RAY-ABSORPTION EDGES OF TRANSITION-METAL OXIDES [J].

DEGROOT, FMF ;

GRIONI, M ;

FUGGLE, JC ;

GHIJSEN, J ;

SAWATZKY, GA ;

PETERSEN, H .

PHYSICAL REVIEW B, 1989, 40 (08) :5715-5723

[6] ON THE REDUCTION OF ORTHORHOMBIC M0O3 TO M0O2 [J].

DELANNAY, F .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1982, 73 (02) :529-537

[7]

EGERTON RF, 1986, ELECTRON ENERGY LOSS, P229

[8] PHASE-TRANSITIONS IN V2O5 IN A HIGH-RESOLUTION ELECTRON-MICROSCOPE [J].

FAN, HJ ;

MARKS, LD .

ULTRAMICROSCOPY, 1989, 31 (04) :357-364

[9] DYNAMIC STUDIES OF METAL-OXIDE CATALYSTS - MOO3 [J].

GAI, PL .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1981, 43 (04) :841-855

[10] OXYGEN-K NEAR-EDGE FINE-STRUCTURE - AN ELECTRON-ENERGY-LOSS INVESTIGATION WITH COMPARISONS TO NEW THEORY FOR SELECTED 3D TRANSITION-METAL OXIDES [J].

GRUNES, LA ;

LEAPMAN, RD ;

WILKER, CN ;

HOFFMANN, R ;

KUNZ, AB .

PHYSICAL REVIEW B, 1982, 25 (12) :7157-7173

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