Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 45, Pages 13385-13389Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506797
Keywords
anatase; H-2 evolution; nanopowders; nitrogen stabilization; titanium
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Funding
- ERC
- DFG
- EAM cluster of excellence
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A simple strategy is used to thermally oxidize TiN nanopowder (approximate to 20nm) to an anatase phase of a TiO2:Ti3+:N compound. In contrast to the rutile phase of such a compound, this photocatalyst provides activity for hydrogen evolution under AM1.5 conditions, without the use of any noble metal co-catalyst. Moreover the photocatalyst is active and stable over extended periods of time (tested for 4months). Importantly, to achieve successful conversion to the active anatase polymorph, sufficiently small starting particles of TiN are needed. The key factor for catalysis is the stabilization of the co-catalytically active Ti3+ species against oxidation by nitrogen present in the starting material.
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