Heterogeneous reaction between Li and anatase TiO2 nanoparticles under ultra-high vacuum
2013 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 15, no 29, 12283-12290 p.Article in journal (Refereed) Published
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).
Place, publisher, year, edition, pages
2013. Vol. 15, no 29, 12283-12290 p.
IdentifiersURN: urn:nbn:se:uu:diva-205415DOI: 10.1039/c3cp51600hISI: 000321271300033OAI: oai:DiVA.org:uu-205415DiVA: diva2:642120