Journal
MATTER
Volume 3, Issue 3, Pages 935-949Publisher
CELL PRESS
DOI: 10.1016/j.matt.2020.07.004
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Funding
- Australian Research Council [DP170104834]
- Griffith University
- China Scholarship Council [201706120323]
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Photocatalytic water splitting holds a key to realizing the hydrogen economy but faces a grand challenge, namely, the severe charge recombination causes low solar-to-hydrogen (STH) efficiency. This work reports a new form of MAPbI(3) microcrystal (MAPbI(3)-MC)/monolayer MoS2 nanosheets (ML-MoS2) composite photocatalyst with type II heterojunction to effectively suppress the charge recombination for efficient photocatalytic hydrogen generation via HI splitting. The ML-MoS2/MAPbI(3)-MC is made of a large-sized MAPbI(3)-MC light harvester anchored with electrocatalytically active ML-MoS2 nanosheets to form a type II heterojunction that possesses a strong built-in electric field aligned between the spatially well-defined MAPbI(3)-MC andML-MoS2 nanosheets to empower the photocatalyst with superior capability to effectively promote the charge separation. The ML-MoS2/MAPbI(3)-MC brings the hydrogen generation performance of the perovskite-based photocatalysts to a new horizon with a champion STH efficiency of 1.09% and a record hydrogen generation activity of 13.6 mmol g(-1) h(-1) under visible light.
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