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research article
Proton insertion in polycrystalline WO3 studied with electron spectroscopy and semi-empirical calculations
Proton insertion in polycryst. tungsten oxide has been studied with photoelectron spectroscopy and semi-empirical calcns. The W 4f spectra show growth of W5+ and W4+ oxidn. states as a function of inserted proton content in the crystal lattice. A concomitant growth of bandgap structure displays two sep. peaks. Semi-empirical calcns. using the periodic large unit cell (LUC) method suggest the growth of W4+ states based on the total energy variation with respect to the no. of protons/unit cell. At this stage the general picture of insertion is that of a multiphase system contg. regions of different x values.
Type
research article
Authors
Henningsson, A.
•
Stashans, A.
•
Sandell, A.
•
Rensmo, H.
•
Soedergren, S.
•
Lindstroem, H.
•
Vayssieres, L.
•
•
Lunell, S.
•
Siegbahn, H.
Publication date
2004
Published in
Volume
47
Start page
23
End page
36
Subjects
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
July 6, 2015
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