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Book ChapterDOI

Occurrence, Extraction, Production and uses of Molybdenum

01 Jan 1994-Studies in Inorganic Chemistry (Elsevier)-Vol. 19, pp 1-93
About: This article is published in Studies in Inorganic Chemistry.The article was published on 1994-01-01. It has received 10 citations till now. The article focuses on the topics: Extraction (chemistry) & Molybdenum.
Citations
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Journal ArticleDOI
TL;DR: In this article, a density functional theory (DFT) analysis of the O 2sp dominated valence band region of MoO 3 was carried out to examine the electronic structure of the oxide systems.

156 citations

Journal ArticleDOI
Adlane Sayede1, T. Amriou1, M. Pernisek1, B. Khelifa1, C. Mathieu1 
TL;DR: In this paper, the structure and electronic properties of the α-MoO3 were studied with periodic LAPW calculations with the results in excellent agreement with the reported experimental pseudo-cubic results.

41 citations

Journal ArticleDOI
TL;DR: In this paper, the authors performed cluster model studies by means of ab initio DFT method to examine electronic properties of different surface O atoms in several V2O5 and MoO3 systems and correlate them with catalytic behavior.

27 citations

Journal ArticleDOI
TL;DR: In this paper, the electronic properties of MoO 2 bulk and (0, 1, 1) surface are discussed. But the surface retains the metallic character of the bulk, and it is found that Fermi level is located within the band dominated by d molybdenum orbitals.
Abstract: Electronic properties of MoO 2 bulk and (0 1 1) surface are discussed. It is found that Fermi level is located within the band dominated by d molybdenum orbitals, thereby reflecting the metallic character of the system. Results for (0 1 1)MoO 2 surface indicate that the surface retains the metallic character of the bulk. Depending on the thickness of the slab used to model the surface (1-layer or 2-layers) the electronic structure and properties change. In the 2-layer slab, bands close to the Fermi level originate both from regular six-fold coordinated Mo(6) centers as well as from five-fold coordinated Mo(5) centers occurring due to surface formation. In the 1-layer slab, peaks right below the Fermi level are dominated by the surface centers that are six-fold coordinated Mo(6) but also centers which are effectively four-fold coordinated Mo(4). This has a profound effect on the reactivity as was tested by a probe reaction of H 2 adsorption, which did not interact with the surface described by the 2-layer slab, but underwent dissociation on the 1-layer slab. The Mo–Mo pairs with bonds of approximately single character, characteristic for the bulk structure, are also present on the surface, both on 1-layer and 2-layer slabs. The local properties of (0 1 1)MoO 2 surface are very similar to other transition metal oxides. Metal–oxygen bonds are of a mixed ionic and covalent nature and the nucleophilicity of oxygen increases with the increase of coordination numbers of the corresponding oxygen atoms.

26 citations

Journal ArticleDOI
TL;DR: In this article, the atomic structure of a reconstructed Mo(1/1/2)-O(2/2/3) surface has been revisited using photoelectron spectroscopy with synchrotron radiation, scanning tunneling microscopy, infrared reflection absorption spectrography and density functional theory.

22 citations

References
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Journal ArticleDOI
TL;DR: In this paper, the authors present a theoretical analysis of SAE 1010 steel anodes in simulated cooling waters. But they use a different approach, using citrate instead of MoO 4 2-based anodes, which is compatible with citrate.

15 citations

Journal ArticleDOI
TL;DR: In this article, the heat of combustion of Mo(CO) 6 in oxygen has been made by bomb calorimetry and independent measurements of the thermal decomposition of Mo[CO] 6 have also been made with a hot-zone reaction calorimeter of novel design.
Abstract: New measurements of the heat of combustion of Mo(CO) 6 in oxygen have been made by bomb calorimetry. Independent measurements of the heat of thermal decomposition of Mo(CO) 6 have also been made with a “hot-zone” reaction calorimeter of novel design. Measurements are also reported of the heat of reaction of Mo(CO) 6 with iodine vapour at high temperatures by using a Calvet High Temperature microcalorimeter, from which the heat of formation of molybdenum triiodide is calculated.

15 citations

Journal ArticleDOI
TL;DR: The use of molybdenum trioxide as a flame retardant in halogen-containing polyester resins has been studied as mentioned in this paper, and it has been shown that MoO 3 has a condensed phase mechanism, to increase the number of decomposition steps, to produce more char, and to alter the structure of the char.

14 citations

Journal ArticleDOI
TL;DR: Une couche mince de MoS 3 sur un substrat d'aluminium, nickel, silice ou alumine est preparee par depot chimique en phase vapeur, dans un domaine de temperature de 150 a 400 o C, a partir dhexafluorure de molybdene et dhexamethyldisilthiane en solution non aqueuse as discussed by the authors.
Abstract: Une couche mince de MoS 3 sur un substrat d'aluminium, nickel, silice ou alumine est preparee par depot chimique en phase vapeur, dans un domaine de temperature de 150 a 400 o C, a partir d'hexafluorure de molybdene et d'hexamethyldisilthiane en solution non aqueuse. Ce film est caracterise par spectroscopie IR a transformee de Fourier, par des mesures de resistivites et d'epaisseur

13 citations