University of Oulu

Zhao, H., Chordiya, K., Leukkunen, P. et al. Dimethylammonium iodide stabilized bismuth halide perovskite photocatalyst for hydrogen evolution. Nano Res. 14, 1116–1125 (2021).

Dimethylammonium iodide stabilized bismuth halide perovskite photocatalyst for hydrogen evolution

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Author: Zhao, He1; Chordiya, Kalyani2,3; Leukkunen, Petri4;
Organizations: 1Environmental and Chemical Engineering Research Unit, University of Oulu, P. O. Box 4300, FI-90014, Oulu, Finland
2ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics ter 13, 6720, Szeged, Hungary
3Institute of Physics, University of Szeged, Dóm tér 9, H-6720, Szeged, Hungary
4Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
5Optoelectronics and Measurement Techniques Unit, University of Oulu, FI-90570, Oulu, Finland
6Present address: VTT Technical Research Centre of Finland, FI-90590, Oulu, Finland
7Microelectronics Research Unit, University of Oulu, P. O. Box 4500, FI-90014, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.2 MB)
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Language: English
Published: Springer Nature, 2020
Publish Date: 2020-11-19


Metal halide perovskites have emerged as novel and promising photocatalysts for hydrogen generation. Currently, their stability in water is a vital and urgent research question. In this paper a novel approach to stabilize a bismuth halide perovskite [(CH₃)₂NH₂]₃[BiI₆] (DA₃BiI₆) in water using dimethylammonium iodide (DAI) without the assistance of acids or coatings is reported. The DA₃BiI6 powder exhibits good stability in DAI solutions for at least two weeks. The concentration of DAI is found as a critical parameter, where the I- ions play the key role in the stabilization. The stability of DA₃BiI6 in water is realized via a surface dissolution–recrystallization process. Stabilized DA₃BiI₆ demonstrates constant photocatalytic properties for visible light-induced photo-oxidation of I⁻ ions and with PtCl₄ as a co-catalyst (Pt-DA₃BiI₆), photocatalytic H₂ evolution with a rate of 5.7 μmol⋅h-1 from HI in DAI solution, obtaining an apparent quantum efficiency of 0.83% at 535 nm. This study provides new insights on the stabilization of metal halide perovskites for photocatalysis in aqueous solution.

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Series: Nano research
ISSN: 1998-0124
ISSN-E: 1998-0000
ISSN-L: 1998-0124
Volume: 14
Pages: 1116 - 1125
DOI: 10.1007/s12274-020-3159-0
Type of Publication: A1 Journal article – refereed
Field of Science: 1172 Environmental sciences
216 Materials engineering
Funding: This work was supported by the Kvantum Institute Emerging Project at the University of Oulu and Academy of Finland ELECTRA-project (No. 2430291511). ELI-ALPS is supported by the European Union and co-financed by the European Regional Development Fund (No. GINOP-2.3.6-15-2015-00001). M. U. K. also acknowledges funding from PaNOSC European project. Open access funding provided by University of Oulu including Oulu University Hospital.
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