Unraveling the Transformation from Type-II to Z-Scheme in Perovskite-Based Heterostructures for Enhanced Photocatalytic CO₂ Reduction

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(5), P. 3303 - 3314

Published: Jan. 25, 2024

The ability to create perovskite-based heterostructures with desirable charge transfer characteristics represents an important endeavor render a set of perovskite materials and devices tunable optoelectronic properties. However, due similar material selection band alignment in type-II Z-scheme heterostructures, it remains challenging obtain favorable electron pathway for photocatalysis. Herein, we report robust tailoring effective via transformation highly efficient selective photocatalytic CO2 reduction. Specifically, CsPbBr3/TiO2 CsPbBr3/Au/TiO2 are synthesized then investigated by ultrafast spectroscopy. Moreover, taking as examples, operando experiments theoretical calculations confirm that the heterostructure could be readily transformed into through establishing low-resistance Ohmic contact, which indicates fast is crucial construction, further demonstrated CsPbBr3/Ag/TiO2 CsPbBr3/MoS2 heterostructures. In contrast pristine CsPbBr3 CsPbBr3/TiO2, exhibits 5.4- 3.0-fold enhancement consumption rate DFT situ diffuse reflectance infrared Fourier transform spectroscopy unveil superior CO selectivity attributed lower energy *CO desorption than hydrogenation *HCO. This meticulous design sheds light on modification multifunctional enlightens conscious optimization semiconductor-based catalysis applications.

Language: Английский

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Internal Electric Field and Interfacial Bonding Engineered Step‐Scheme Junction for a Visible‐Light‐Involved Lithium–Oxygen Battery

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(12)

Published: Jan. 12, 2022

Li-O2 batteries have aroused considerable interest in recent years, however they are hindered by high kinetic barriers and large overvoltages at cathodes. Herein, a step-scheme (S-scheme) junction with hematite on carbon nitride (Fe2 O3 /C3 N4 ) is designed as bifunctional catalyst to facilitate oxygen redox for visible-light-involved battery. The internal electric field interfacial Fe-N bonding the heterojunction boost separation directional migration of photo-carriers establish spatially isolated centers, which photoelectrons C3 holes Fe2 remarkably accelerate discharge charge kinetics. These enable battery present an elevated voltage 3.13 V under illumination, higher than equilibrium potential 2.96 dark, 3.19 V, well superior rate capability cycling stability. This work will shed light rational cathode design metal-O2 batteries.

Language: Английский

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Review on MXene/TiO2 nanohybrids for photocatalytic hydrogen production and pollutant degradations

Journal of environmental chemical engineering, Journal Year: 2022, Volume and Issue: 10(2), P. 107211 - 107211

Published: Jan. 21, 2022

Language: Английский

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Tracking charge transfer pathways in SrTiO3/CoP/Mo2C nanofibers for enhanced photocatalytic solar fuel production

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2022, Volume and Issue: 43(2), P. 507 - 518

Published: Jan. 17, 2022

Language: Английский

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In situ cascade growth-induced strong coupling effect toward efficient photocatalytic hydrogen evolution of ReS2/ZnIn2S4

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 328, P. 122493 - 122493

Published: Feb. 20, 2023

Language: Английский

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