TY  - JOUR
AU  - Rogala, M.
AU  - Bihlmayer, G.
AU  - Dabrowski, P.
AU  - Rodenbücher, C.
AU  - Wrana, D.
AU  - Krok, F.
AU  - Klusek, Z.
AU  - Szot, K.
TI  - Self-reduction of the native TiO2 (110) surface during cooling after thermal annealing – in-operando investigations
JO  - Scientific reports
VL  - 9
IS  - 1
SN  - 2045-2322
CY  - [London]
PB  - Macmillan Publishers Limited, part of Springer Nature
M1  - FZJ-2019-05355
SP  - 12563
PY  - 2019
AB  - We investigate the thermal reduction of TiO2 in ultra-high vacuum. Contrary to what is usually assumed, we observe that the maximal surface reduction occurs not during the heating, but during the cooling of the sample back to room temperature. We describe the self-reduction, which occurs as a result of differences in the energies of defect formation in the bulk and surface regions. The findings presented are based on X-ray photoelectron spectroscopy carried out in-operando during the heating and cooling steps. The presented conclusions, concerning the course of redox processes, are especially important when considering oxides for resistive switching and neuromorphic applications and also when describing the mechanisms related to the basics of operation of solid oxide fuel cells.
LB  - PUB:(DE-HGF)16
C6  - pmid:31467321
UR  - <Go to ISI:>//WOS:000483017100042
DO  - DOI:10.1038/s41598-019-48837-3
UR  - https://juser.fz-juelich.de/record/866184
ER  -