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

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(5), С. 3303 - 3314

Опубликована: Янв. 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.

Язык: Английский

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Directed Electron Delivery from a Pb‐Free Halide Perovskite to a Co(II) Molecular Catalyst Boosts CO₂ Photoreduction Coupled with Water Oxidation

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(21)

Опубликована: Фев. 29, 2024

Abstract The development of high‐performance photocatalytic systems for CO 2 reduction is appealing to address energy and environmental issues, while it challenging avoid using toxic metals organic sacrificial reagents. We here immobilize a family cobalt phthalocyanine catalysts on Pb‐free halide perovskite Cs AgBiBr 6 nanosheets with delicate control the anchors catalysts. Among them, molecular hybrid photocatalyst assembled by carboxyl achieves optimal performance an electron consumption rate 300±13 μmol g −1 h visible‐light‐driven ‐to‐CO conversion coupled water oxidation O , over 8 times unmodified (36±8 ), also far surpassing documented (<150 ). Besides improved intrinsic activity, electrochemical, computational, ex‐/in situ X‐ray photoelectron absorption spectroscopic results indicate that electrons photogenerated at Bi atoms can be directionally transferred catalyst via which strongly bind atoms, substantially facilitating interfacial transfer kinetics thereby photocatalysis.

Язык: Английский

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Atomically Contacted Cs₃Bi₂Br₉ QDs@UiO‐66 Composite for Photocatalytic CO₂ Reduction

Small, Год журнала: 2024, Номер 20(34)

Опубликована: Апрель 9, 2024

Abstract Metal halide perovskite quantum dots (QDs) are widely studied in the field of photocatalytic CO 2 due to their strong light absorption and long carrier migration length. However, it can not exhibit high catalytic performance because radiative recombination lack effective sites. organic frameworks (MOFs) encapsulated QDs only solve aforementioned problems, but also maintain own unique characteristics with ultra‐high specific surfaces area abundant metal In this work, lead‐free bismuth‐based into Zr‐based MOF (UiO‐66), which combines advantages power conversion efficiency surface porosity UiO‐66. addition, benefiting from close contact between Cs 3 Bi Br 9 UiO‐66 enables photogenerated electrons be rapidly transferred MOF. As a result, @UiO‐66 composite exhibits higher yield for reduction than that prepared large‐sized

Язык: Английский

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Perovskite Paradigm Shift: A Green Revolution with Lead-Free Alternatives in Photocatalytic CO₂ Reduction

ACS Energy Letters, Год журнала: 2024, Номер 9(4), С. 1932 - 1975

Опубликована: Апрель 4, 2024

Carbon dioxide (CO2), an archetypal greenhouse gas, can be transformed into valuable fuels through photocatalysis, presenting auspicious avenue for combating global climate change and energy crisis. While halide perovskites have sparked substantial research interest, concerns over lead toxicity spurred exploration of their lead-free counterparts CO2 photoreduction. This comprehensive Review navigates the fundamentals reduction, delving basic principles, mechanisms, relevant operando techniques. It then introduces diverse structures (LFHPs), synthesis methodologies, intrinsic properties that render them suitable Subsequently, unfolds application modification strategies light-driven conversion, highlighting breakthroughs shedding light on potential mechanisms. Finally, current challenges to tailor LFHPs robust photocatalytic reduction are critically discussed, offering insights future in this realm. aims illuminate path toward sustainable bridging knowledge gaps inspiring innovations a greener carbon-neutral tomorrow.

Язык: Английский

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Efficient photocatalytic selective oxidation of benzyl alcohol by nano-Pd/TiO2−x with synergistic effect of oxygen vacancy and shell structure

Journal of Alloys and Compounds, Год журнала: 2024, Номер 979, С. 173555 - 173555

Опубликована: Янв. 21, 2024

Язык: Английский

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CO₂ to dimethyl ether (DME): structural and functional insights of hybrid catalysts

Catalysis Science & Technology, Год журнала: 2024, Номер 14(6), С. 1387 - 1427

Опубликована: Янв. 1, 2024

Designing robust hybrid/bifunctional catalysts for CO 2 to DME is of increasing importance in energy and environmental science simultaneously address two important global challenges: carbon emission reduction alternative fuel development.

Язык: Английский

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Halogen Sites Regulation in Lead-Free AgSb-based Perovskites for Efficient Photocatalytic CO2 Reduction

DeCarbon, Год журнала: 2025, Номер unknown, С. 100095 - 100095

Опубликована: Янв. 1, 2025

Язык: Английский

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C₆₀ and Derivatives Boost Electrocatalysis and Photocatalysis: Electron Buffers to Heterojunctions

Advanced Energy Materials, Год журнала: 2023, Номер 13(46)

Опубликована: Окт. 27, 2023

Abstract Buckminsterfullerene (C 60 ) and derivatives are significant in the synthesis of efficient electrocatalysts photocatalysts. This is because electron acceptor properties distinctive heterostructure(s) physicochemical characteristics. High‐performance photocatalysts important therefore conversions for clean energy. Here a critical assessment advances use C as heterostructures “electron buffers” catalysts reported. Methodologies preparing composite assessed categorized microscopic mechanisms boosting catalytic performance through materials including, semiconductors, carbon‐based metal‐free materials, metal nanoclusters, single atoms, metal–organic skeletons established. Important characterizations used with derivative composites contrasted practical challenges to development determined. A prospective on future directions likely outcomes high efficiency provided. It concluded that advantageous advanced structural integrity boosted transport. The findings expected be interest benefit researchers manufacturers formation buffer areas significantly performance.

Язык: Английский

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Boosted photocatalytic H2 production over p-n S-scheme heterojunction of 0D Ni3V2O8 quantum dots decorated on ultra-thin 2D g-C3N4 nanosheets

Journal of environmental chemical engineering, Год журнала: 2023, Номер 12(1), С. 111841 - 111841

Опубликована: Дек. 29, 2023

Язык: Английский

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Recent progress in metal halide perovskite-based photocatalysts: physicochemical properties, synthetic strategies, and solar-driven applications

Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(41), С. 22058 - 22086

Опубликована: Янв. 1, 2023

Metal halide perovskite (MHP) materials have garnered significant interest in the realm of energy conversion and storage amid push for carbon-neutral solutions due to tunable band gap, high light collection efficiency, photogenerated carrier mobility, defect tolerance.

Язык: Английский

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