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Heterogeneous reaction between Li and anatase TiO2 nanoparticles under ultra-high vacuum
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
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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
Abstract [en]

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.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-205415DOI: 10.1039/c3cp51600hISI: 000321271300033OAI: oai:DiVA.org:uu-205415DiVA: diva2:642120
Available from: 2013-08-20 Created: 2013-08-16 Last updated: 2017-12-06Bibliographically approved

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Sandell, Anders

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