Ov. Krylov et al., CATALYSTS FOR SYNTHESES FROM CO AND H-2 - DEVELOPMENT OF CATALYST STRUCTURES AND REACTION-MECHANISMS, Kinetics and catalysis, 35(6), 1994, pp. 741-755
A review of papers is presented on the relation between the activity,
selectivity, and preparation procedures of Ni-, Co-, and Fe-containing
mono- and bimetallic catalysts derived from metal carbonyls and oxide
s by precipitation, plasmochemical and mechanochemical treatments, and
the structure of final catalysts for CO hydrogenation. Co and Ni are
more active in CO hydrogenation, whereas Fe catalysts are more selecti
ve relative to C-2 - C-4 hydrocarbon production. The activity of oxidi
zed catalysts decreases, while selectivity increases. Complex structur
es are developed under catalysis conditions, which consist of metal ph
ases, carbides, and metal oxides in various metal oxidation states. Di
fferent phases and active sites are responsible for the different stag
es of the complex catalytic process. The role of carbides as plausible
active phases and intermediates is discussed.