Size control of the photo-electrochemical water splitting activity of SrTiO3 nano-cubes

0497727 - ÚFCH JH 2020 RIV GB eng J - Journal Article
Klusáčková, Monika - Nebel, Roman - Minhová Macounová, Kateřina - Klementová, Mariana - Krtil, Petr
Size control of the photo-electrochemical water splitting activity of SrTiO3 nano-cubes.
Electrochimica acta. Roč. 297, FEB 2019 (2019), s. 215-222. ISSN 0013-4686. E-ISSN 1873-3859
R&D Projects: GA ČR(CZ) GA17-12800S; GA MŠMT LM2015087
Institutional support: RVO:61388955 ; RVO:68378271
Keywords : photoelectrochemistry * water spliting * size effects
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis); Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impact factor: 6.215, year: 2019
Method of publishing: Limited access

Size control of the photo-electrochemical activity of a n-semiconductor oxide in water oxidation was demonstrated on size and shape controlled SrTiO3 nano-cubes featuring homogeneous {100} oriented surface. The carbonate free SrTiO3 perovskite nano-cubes were synthesized from titanium(IV) bis(ammonium lactato)dihydroxide solution and strontium nitrate in presence of the structure ordering gelatin. The gelatin content determines the size of the perovskite nano-cubes in the range 10–30 nm SrTiO3 nano-cubes show band gap in the range 3.2–3.3 eV with slight blue shift of the absorption edge for nano-cubes smaller than 20 nm. All materials are active in photo-electrochemical water splitting, their specific activity, however, decreases with decreasing particle size and drop exponentially for nano-cubes smaller than 20 nm.
Permanent Link: http://hdl.handle.net/11104/0290236