Advanced

An Oxidized Surface State Model of Vanadium Oxides and Its Application to Catalysis

Andersson, Arne LU (1982) In Journal of Solid State Chemistry 42(3). p.263-275
Abstract
The charge distribution around the VO bonds in V2O5, V6O13, and V2O4 was calculated by using an empirical formula. The same expression was also used to calculate the oxygen bond strengths on the surface. The surfaces of lower oxides were treated as though they were in an oxidized state which is believed to correspond to the conditions in oxidation and ammoxidation processes. The result is that O2−, in the form of VO surface groups, is responsible for the catalytic oxidation of hydrocarbons. O− is hindered by the formation of stable OH− groups. The positions of lower valent oxygens are considered to be vacant because of a slow reoxidation rate. In V2O5 the VO groups are located on the (010) plane, while in V6O13 they are mainly located on... (More)
The charge distribution around the VO bonds in V2O5, V6O13, and V2O4 was calculated by using an empirical formula. The same expression was also used to calculate the oxygen bond strengths on the surface. The surfaces of lower oxides were treated as though they were in an oxidized state which is believed to correspond to the conditions in oxidation and ammoxidation processes. The result is that O2−, in the form of VO surface groups, is responsible for the catalytic oxidation of hydrocarbons. O− is hindered by the formation of stable OH− groups. The positions of lower valent oxygens are considered to be vacant because of a slow reoxidation rate. In V2O5 the VO groups are located on the (010) plane, while in V6O13 they are mainly located on the (001) surface plane. But in this case the (100) and (010) surface planes also have some VO groups. The catalytic activity of the rutile form of V2O4 is limited by sterical factors, but the (110) surface plane has oxygens pointing perpendicular out of the surface. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Solid State Chemistry
volume
42
issue
3
pages
263 - 275
publisher
Elsevier
external identifiers
  • wos:A1982NR39600005
  • scopus:0020133530
ISSN
0022-4596
DOI
10.1016/0022-4596(82)90005-6
language
English
LU publication?
yes
id
cfd5a725-d50d-467b-bf1d-7e6a4d27232b (old id 3914657)
date added to LUP
2013-07-01 13:40:39
date last changed
2017-07-30 04:44:50
@article{cfd5a725-d50d-467b-bf1d-7e6a4d27232b,
  abstract     = {The charge distribution around the VO bonds in V2O5, V6O13, and V2O4 was calculated by using an empirical formula. The same expression was also used to calculate the oxygen bond strengths on the surface. The surfaces of lower oxides were treated as though they were in an oxidized state which is believed to correspond to the conditions in oxidation and ammoxidation processes. The result is that O2−, in the form of VO surface groups, is responsible for the catalytic oxidation of hydrocarbons. O− is hindered by the formation of stable OH− groups. The positions of lower valent oxygens are considered to be vacant because of a slow reoxidation rate. In V2O5 the VO groups are located on the (010) plane, while in V6O13 they are mainly located on the (001) surface plane. But in this case the (100) and (010) surface planes also have some VO groups. The catalytic activity of the rutile form of V2O4 is limited by sterical factors, but the (110) surface plane has oxygens pointing perpendicular out of the surface.},
  author       = {Andersson, Arne},
  issn         = {0022-4596},
  language     = {eng},
  number       = {3},
  pages        = {263--275},
  publisher    = {Elsevier},
  series       = {Journal of Solid State Chemistry},
  title        = {An Oxidized Surface State Model of Vanadium Oxides and Its Application to Catalysis},
  url          = {http://dx.doi.org/10.1016/0022-4596(82)90005-6},
  volume       = {42},
  year         = {1982},
}