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Fast low temperature synthesis of layered perovskite heterojunctions for overall water splitting

Title data

Hofmann, Anja ; Weiß, Morten ; Marschall, Roland:
Fast low temperature synthesis of layered perovskite heterojunctions for overall water splitting.
In: JPhys Energy. Vol. 3 (6 November 2020) Issue 1 . - No. 014002.
ISSN 2515-7655
DOI: https://doi.org/10.1088/2515-7655/abc07a

Abstract in another language

The Ba5Ta4O15-Ba3Ta5O15-BaTa2O6 heterojunction was synthesized for the first time at ambient pressure and mild temperatures without further need of calcination. By systematically adjusting the synthesis parameters, the composition of the composite could be tailored. Detailed Rietveld refinement revealed the highest amount of by-phases for the non-calcined sample with around 12 of Ba3Ta5O15 and 12 of BaTa2O6, respectively. Ba5Ta4O15 represented the main phase for all samples. The non-calcined heterojunction showed the highest activity in photocatalytic hydrogen production with 2360 µmol h−1m−2 corresponding to 1180 µmol h−1 without any co-catalyst. A Rh-Cr2O3 co-catalyst was photodeposited on all samples depending on the surface area for overall water splitting. All samples were active in overall water splitting. This novel synthesis strategy paves the way towards a general low-cost and energy-saving synthesis route to achieve highly crystalline and highly active metal oxide semiconductor photocatalysts.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry III
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry III > Chair Physical Chemistry III - Univ.-Prof. Dr. Roland Marschall
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 17 Nov 2020 07:32
Last Modified: 17 Nov 2020 07:32
URI: https://eref.uni-bayreuth.de/id/eprint/59866