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Heterogeneous reaction between Li and anatase TiO2 nanoparticles under ultra-high vacuum

Sandell, A. ; Walle, L. E. ; Blomquist, Jakob LU ; Uvdal, Per LU and Borg, A. (2013) In Physical Chemistry Chemical Physics 15(29). p.12283-12290
Abstract
We demonstrate heterogeneous chemistry between Li and anatase TiO2 nanoparticles under UHV. The reduction of TiO2 upon formation of lithium oxide proceeds via two different schemes: one that reduces Ti4+ to Ti3+ and one that reduces Ti4+ directly to Ti2+. The second scheme sets in only after a critical degree of reduction (i.e. Li amount) has been reached (Li/Ti = 0.28) and is associated with restructuring of the film. Two films with different morphologies were compared and the results demonstrate that the reaction between Li and larger TiO2 structures (30-50 nm) is kinetically restricted while such effects were significantly less prominent for small particles (10 nm).
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Chemistry Chemical Physics
volume
15
issue
29
pages
12283 - 12290
publisher
Royal Society of Chemistry
external identifiers
  • wos:000321271300033
  • scopus:84880001924
  • pmid:23775224
ISSN
1463-9084
DOI
10.1039/c3cp51600h
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Max-laboratory (011012005), Chemical Physics (S) (011001060)
id
0f88f349-df9d-40ac-8d29-e385a160293e (old id 3979382)
date added to LUP
2016-04-01 13:58:38
date last changed
2022-02-19 08:30:42
@article{0f88f349-df9d-40ac-8d29-e385a160293e,
  abstract     = {{We demonstrate heterogeneous chemistry between Li and anatase TiO2 nanoparticles under UHV. The reduction of TiO2 upon formation of lithium oxide proceeds via two different schemes: one that reduces Ti4+ to Ti3+ and one that reduces Ti4+ directly to Ti2+. The second scheme sets in only after a critical degree of reduction (i.e. Li amount) has been reached (Li/Ti = 0.28) and is associated with restructuring of the film. Two films with different morphologies were compared and the results demonstrate that the reaction between Li and larger TiO2 structures (30-50 nm) is kinetically restricted while such effects were significantly less prominent for small particles (10 nm).}},
  author       = {{Sandell, A. and Walle, L. E. and Blomquist, Jakob and Uvdal, Per and Borg, A.}},
  issn         = {{1463-9084}},
  language     = {{eng}},
  number       = {{29}},
  pages        = {{12283--12290}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Physical Chemistry Chemical Physics}},
  title        = {{Heterogeneous reaction between Li and anatase TiO2 nanoparticles under ultra-high vacuum}},
  url          = {{http://dx.doi.org/10.1039/c3cp51600h}},
  doi          = {{10.1039/c3cp51600h}},
  volume       = {{15}},
  year         = {{2013}},
}