Moessbauer spectroscopic study of the electronic state of iron in an iron--molybdenum catalyst during the oxidation of methanol. [Conditions of treatment of the catalyst]

Journal Article · Sat Nov 01 04:00:00 EST 1975 · Dokl. Phys. Chem. (Engl. Transl.); (United States)

OSTI ID:7336409

Maksimov, Yu V; Suzdalev, I P; Gol'danskii, V I; Matveev, A I; Makarov, E F; Margolis, L Ya

The electronic state of iron in an iron-molybdenum catalyst in the temperature range of 260-320/sup 0/C for different conditions of treatment of the catalyst and also during the reaction of methanol oxidation was studied. The results obtained were analyzed on the basis of vacancy models. The catalyst had an atomic ratio Mo/Fe approximately 2 and a geometric surface area approximately 20m/sup 2//g and consisting of normal iron molybdate and molybdenum trioxide phases. Two kinds of surface defects in the iron molybdate lattice were distinguishable from the gamma resonance spectroscopic data. These defects are vacancies localized close to the Fe/sup 3 +/ ions, responsible for the reduction of the catalyst surface in air, and vacancies formed during the oxidation of methanol. The energy of formation of vacancies of the second kind amounts to approximately 20 kcal/mole, a value close to the value of the total activation energy of the reaction on this catalyst. (BLM)

• Research Organization: Inst. of Chemical Physics, Moscow
• OSTI ID: 7336409
• Journal Information: Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 225:1-3; ISSN DKPCA
• Country of Publication: United States
• Language: English

Related Subjects

090221* -- Alcohol Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
ELECTRONIC STRUCTURE
HYDROXY COMPOUNDS
IRON COMPOUNDS
METHANOL
MOLYBDATES
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS