Electron donor properties and catalytic activity of manganese ferrospinels

Authors
Sugunan, S John, D Renuka, NK Varghese, M Sreekumar, K Ramankutty, CG
Citation
S. Sugunan et al., Electron donor properties and catalytic activity of manganese ferrospinels, REACT KIN C, 66(1), 1999, pp. 39-45
Citations number
20
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
REACTION KINETICS AND CATALYSIS LETTERS
ISSN journal
01331736 → ACNP
Volume
66
Issue
1
Year of publication
1999
Pages
39 - 45
Database
ISI
SICI code
0133-1736(199901)66:1<39:EDPACA>2.0.ZU;2-M
Abstract
The electron donating properties of manganese ferrospinels of various compo sitions (MnFe2O4, Mn1.2Fe1.8O4, Mn2FeO4 and Mn2.5Fe0.5O4) were studied from the adsorption of electron accepters of various electron affinity values f rom acetonitrile as solvent. The limit of electron transfer from the oxide surface is from 1.77 to 2.40 eV in terms of the electron affinity of the el ectron acceptor. The data have been correlated with the catalytic activity of these oxides towards autoxidation of sulfites. Both weak and strong elec tron donor sites catalyze the reaction.