Hydrogen evolution with CsPbBr3 perovskite nanocrystals under visible light in solution

Pavliuk, Mariia V.; Abdellah, Mohamed; Sá, Jacinto

doi:10.1016/j.mtcomm.2018.05.001

Cited by 36 publications

(33 citation statements)

References 62 publications

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“…1e). The corresponding photoluminescence (PL) spectrum unfolded a narrow emission at 520 nm, agreeing with previous reports 21,31 . Accordingly, the QDs solution showed a bright green fluorescence under 365 nm UV light (inset of Fig.…”

Section: Resultssupporting

confidence: 91%

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

et al. 2020

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Exploring photocatalysts to promote CO2 photoreduction into solar fuels is of great significance. We develop TiO2/perovskite (CsPbBr3) S-scheme heterojunctions synthesized by a facile electrostatic-driven self-assembling approach. Density functional theory calculation combined with experimental studies proves the electron transfer from CsPbBr3 quantum dots (QDs) to TiO2, resulting in the construction of internal electric field (IEF) directing from CsPbBr3 to TiO2 upon hybridization. The IEF drives the photoexcited electrons in TiO2 to CsPbBr3 upon light irradiation as revealed by in-situ X-ray photoelectron spectroscopy analysis, suggesting the formation of an S-scheme heterojunction in the TiO2/CsPbBr3 nanohybrids which greatly promotes the separation of electron-hole pairs to foster efficient CO2 photoreduction. The hybrid nanofibers unveil a higher CO2-reduction rate (9.02 μmol g–1 h–1) comparing with pristine TiO2 nanofibers (4.68 μmol g–1 h–1). Isotope (13CO2) tracer results confirm that the reduction products originate from CO2 source.

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Section: Resultssupporting

confidence: 91%

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

et al. 2020

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“…first reported the MAPbI 3 as a photocatalyst for the solar‐driven splitting of HI solution, [ 8 ] which stimulates the photocatalytic application of halide perovskite‐based materials. [ 21–34 ] For instance, Wu et al. constructed a MAPbI 3 /rGO composite using facile photoreduction method, and achieved a much higher photocatalytic HI splitting efficiency than the pristine MAPbI 3 due to the efficient extraction of photogenerated electrons by rGO.…”

Section: Introductionmentioning

confidence: 99%

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Cai

Teng

et al. 2020

Adv Funct Materials

108

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Halide perovskite like methylammonium lead iodide perovskite (MAPbI3) with its prominent optoelectronic properties has triggered substantial concerns in photocatalytic H2 evolution. In this work, to attain preferable photocatalytic performance, a MAPbI3/cobalt phosphide (CoP) hybrid heterojunction is constructed by a facile in situ photosynthesis approach. Systematic investigations reveal that the CoP nanoparticle can work as co‐catalyst to not only extract photogenerated electrons effectively from MAPbI3 to improve the photoinduced charge separation, but also facilitate the interfacial catalytic reaction. As a result, the as‐achieved MAPbI3/CoP hybrid displays a superior H2 evolution rate of 785.9 µmol h−1 g−1 in hydroiodic acid solution within 3 h, which is ≈8.0 times higher than that of pristine MAPbI3. Furthermore, the H2 evolution rate of MAPbI3/CoP hybrid can reach 2087.5 µmol h−1 g−1 when the photocatalytic reaction time reaches 27 h. This study employs a facile in situ photosynthesis strategy to deposit the metal phosphide co‐catalyst on halide perovskite nanocrystals to conduct photocatalytic H2 evolution reaction, which may stimulate the intensive investigation of perovskite/co‐catalyst hybrid systems for future photocatalytic applications.

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“…Inspired by these pioneering works, various materials have been further employed for incorporation with MHPs to improve the activity and stability in aqueous solutions, such as black phosphorus (BP)/MAPbI 3 , g‐C 3 N 4 /MAPbBr 3 , and multicomponent CsPbBr 3 /Ru−TiO 2 heterojunctions. To date, the highest H 2 generation rate of 7.3 mmol g −1 h −1 was achieved over BP/MAPbI 3 hybrid materials.…”

Section: Engineering Mhps For Photocatalysismentioning

confidence: 99%

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

et al. 2020

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Artificial photosynthesis has attracted increasing attention due to recent environmental and energy concerns. Metal halide perovskites (MHPs) demonstrating excellent optoelectronic properties have currently emerged as novel and efficient photocatalytic materials. Herein, the structural features of MHPs that are responsible for the photoinduced charge separation and charge migration properties are briefly introduced, and then important and necessary photophysical and photochemical aspects of MHPs related to photoredox catalysis are summarized. Subsequently, the applications of MHPs for solar energy harvesting and photocatalytic conversion, including H2 evolution, CO2 reduction, degradation of organic pollutants, and photoredox organic synthesis, are extensively demonstrated, with a focus on strategies for improving the performance (e.g., selectivity, activity, stability, recyclability, and environmental compatibility) of these MHP‐based photocatalytic systems. To conclude, existing challenges and prospects on the future development of MHP‐based materials towards photoredox catalysis applications are detailed.

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Hydrogen evolution with CsPbBr3 perovskite nanocrystals under visible light in solution

Cited by 36 publications

References 62 publications

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

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Hydrogen evolution with CsPbBr3 perovskite nanocrystals under visible light in solution

Cited by 36 publications

References 62 publications

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

In Situ Photosynthesis of an MAPbI3/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

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In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution