Catalytic properties of transition metal carbides I. Preparation and physical characterization of bulk mixed carbides of molybdenum and tungsten

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90348-5· OSTI ID:6437511

Leclercq, L; Grimblot, J; Gengembre, L; Leclercq, G ^[1]; Provost, M; Hardy, A M ^[2]; Pastor, H ^[3]

---

1. Universite des Sciences et Techniques de Lille Flandres-Artois (France)
2. Universite de Poitiers (France)
3. Ugicarb Morgon, Grenoble (France)

Unsupported ternary alloys of W and Mo with carbon as mixed carbide catalysts were prepared with various relative compositions of W, Mo, and C in order to be used as reference compounds well characterized for comparison with supported carbides less easy to study by physicochemical methods. X-ray diffraction and XPS were used to study the bulk and the surface structures of the complex phases present. For mixed W, Mo carbides, molybdenum surface enrichment occurs and an attempt to determine the true surface composition has been made.

• OSTI ID: 6437511
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 117:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408 -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALLOY SYSTEMS
CARBIDES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
ENRICHMENT
HYDROGENATION
METALS
METHANATION
MOLYBDENUM
MOLYBDENUM CARBIDES
MOLYBDENUM COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
SYNTHESIS
TERNARY ALLOY SYSTEMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY