@article{90fc42721fdb45b1b26fb2ff61003ce7,
title = "In Situ Formation of Bismuth-Based Perovskite Heterostructures for High-Performance Cocatalyst-Free Photocatalytic Hydrogen Evolution",
abstract = "Solar-to-fuel conversion with organic–inorganic hybrid halide perovskites has attracted growing attention as a result of their excellent optoelectronic properties as well as the low temperature of the solution based fabrication process. However, the most comprehensively developed hybrid perovskite materials are comprised of the toxic metal lead, raising concerns about environmental health threats. Herein, a lead-free bismuth (Bi)-based hybrid perovskite showing in situ growth of heterojunctions is successfully developed at the interface of methylammonium bismuth iodide (MA3Bi2I9) and tri(dimethylammonium) hexa-iodobismuthate (DMA3BiI6) by a facile solvent engineering technique. The air-stable MA3Bi2I9/DMA3BiI6 perovskite heterostructure with enhanced photoinduced charge separation exhibit outstanding visible-light-induced photocatalytic activity for H2 evolution in aqueous hydrogen iodide solution. The powdered MA3Bi2I9/DMA3BiI6 heterostructured composite (BBP-5) shows a H2 evolution rate of 198.2 µmol h−1 g−1 without the addition of Pt co-catalysts under 100 mW cm−2 of visible-light (λ ≥ 420 nm) illumination.",
keywords = "co-catalyst-free, in situ formation, perovskite heterojunctions, photocatalytic hydrogen evolution",
author = "Yunqi Tang and Mak, {Chun Hong} and Rugeng Liu and Zuankai Wang and Li Ji and Haisheng Song and Chunyan Tan and Fr{\'e}d{\'e}ric Barri{\`e}re and Hsu, {Hsien Yi}",
note = "Funding Information: The authors acknowledge financial support from the Research Grants Council of Hong Kong (Grant No. 21203518, 8730049, and 9048121), City University of Hong Kong (Grant Nos. 7005289, 9680208, 9667213, and 9052029), Shenzhen Science Technology and Innovation Commission (Grant No. R‐IND12302), National Natural Science Foundation of China (Grant Nos. 61874165 and 21833009) as well as Major State Basic Research Development Program of China (2019YFB1503401). The authors are grateful to the RGC‐PHC France/Hong Kong PROCORE program for the awarding of a bilateral travel grant (project 42544QK). Funding Information: The authors acknowledge financial support from the Research Grants Council of Hong Kong (Grant No. 21203518, 8730049, and 9048121), City University of Hong Kong (Grant Nos. 7005289, 9680208, 9667213, and 9052029), Shenzhen Science Technology and Innovation Commission (Grant No. R-IND12302), National Natural Science Foundation of China (Grant Nos. 61874165 and 21833009) as well as Major State Basic Research Development Program of China (2019YFB1503401). The authors are grateful to the RGC-PHC France/Hong Kong PROCORE program for the awarding of a bilateral travel grant (project 42544QK). Publisher Copyright: {\textcopyright} 2020 Wiley-VCH GmbH",
year = "2020",
month = dec,
day = "22",
doi = "10.1002/adfm.202006919",
language = "English",
volume = "30",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "52",
}