Fullerene–Graphene Acceptor Drives Ultrafast Carrier Dynamics for Sustainable CdS Photocatalytic Hydrogen Evolution

Advanced Functional Materials, Год журнала: 2022, Номер 32(23)

Опубликована: Март 14, 2022

Abstract Ultrafast excited‐state decay and intrinsic charge carrier recombination restrain the photoactivity enhancement for solar‐to‐H 2 production. Here, a CdS‐fullerene/graphene (CdS‐F/G) photocatalyst is synthesized enhancing visible‐light‐driven hydrogen generation from earth‐abundant water. The CdS‐F/G shows ultrafast interfacial electrons/holes transfer holes self‐trapping process in photocatalysis. in‐situ dynamic study transient absorption spectroscopy reveals sub‐microsecond‐lived excited states (≈172.6 ns), electron (≈30.3 ps), hole trapping (≈44.0 ps) photocatalyst. efficient active species transportation prolonged lifetime significantly enhance separation state survival, increasing photostability. Consequently, visible‐light activity (>400%) of H evolution reaction (HER) obtained at with high stability (>36 h). 127.2 µmol h −1 g performance corresponding to quantum efficiency 7.24% 420 nm not only higher than case pristine CdS (29.2 ) but also much that CdS‐Pt (73.8 ). cost‐effective exhibits great potential sustainable high‐efficiency photocatalytic water splitting into clean energy carriers. Moreover, optimized electronic structure associated promotes overall O generation.

Язык: Английский

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Phosphorus-enriched platinum diphosphide nanodots as a highly efficient cocatalyst for photocatalytic H2 evolution of CdS

Chemical Engineering Journal, Год журнала: 2022, Номер 439, С. 135758 - 135758

Опубликована: Март 12, 2022

Язык: Английский

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Research progress in metal sulfides for photocatalysis: From activity to stability

Chemosphere, Год журнала: 2022, Номер 303, С. 135085 - 135085

Опубликована: Май 23, 2022

Язык: Английский

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Efficient Photocatalytic Hydrogen Evolution by Modulating Excitonic Effects in Ni‐Intercalated Covalent Organic Frameworks

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

Опубликована: Фев. 15, 2023

Abstract Covalent organic frameworks (COFs) as appealing platforms have received tremendous interest in the field of photocatalytic H 2 evolution owing to their well‐defined structures and tailor‐made function. However, excitonic effects resulting from Coulomb interactions between electron–hole pairs are key rate‐determining processes hydrogen evolution, which usually ignored. Thus, it is profound significance highly desired, but still a challenge, explore new routes modulate dissociation COFs for boosting photocatalysis. To address this Ni‐intercalated fluorenone‐based (Ni‐COF‐SCAU‐1) at imine linkage, proposed first time, demonstrated exhibit enhanced polarization electric field; thus, facilitating Hall electron mobility singlet excitons into free charge carriers under photoexcitation participate surface reaction. Benefiting these results, Ni‐COF‐SCAU‐1 displays production rate 197.46 mmol·g −1 h visible light irradiation with an apparent quantum efficiency (AQE) up 43.2% 420 nm. This work offers in‐depth understanding crucial role interlayer atomic interface improving paves way regulation COFs.

Язык: Английский

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Manipulating the Spin State of Co Sites in Metal–Organic Frameworks for Boosting CO₂ Photoreduction

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(5), С. 3241 - 3249

Опубликована: Янв. 26, 2024

Photocatalytic CO2 reduction holds great potential for alleviating global energy and environmental issues, where the electronic structure of catalytic center plays a crucial role. However, spin state, key descriptor properties, is largely overlooked. Herein, we present simple strategy to regulate states Co centers by changing their coordination environment exchanging species into stable Zn-based metal–organic framework (MOF) afford Co-OAc, Co-Br, Co-CN photoreduction. Experimental DFT calculation results suggest that distinct sites give rise different charge separation abilities barriers adsorption/activation in photocatalysis. Consequently, optimized Co-OAc with highest spin-state presents an excellent photocatalytic activity 2325.7 μmol·g–1·h–1 selectivity 99.1% CO, which are among best all reported MOF photocatalysts, absence noble metal additional photosensitizer. This work underlines MOFs as ideal platform manipulation toward improved

Язык: Английский

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Promoting body carriers migration of CdS nanocatalyst by N-doping for improved hydrogen production under simulated sunlight irradiation

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 313, С. 121470 - 121470

Опубликована: Май 3, 2022

Язык: Английский

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Single-atom catalysts for high-efficiency photocatalytic and photoelectrochemical water splitting: distinctive roles, unique fabrication methods and specific design strategies

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(13), С. 6835 - 6871

Опубликована: Янв. 1, 2022

A comprehensive review about the recent advances of single-atom catalysts for photocatalytic and photoelectrochemical water splitting is presented by highlighting distinctive roles, unique fabrication methods specific design strategies.

Язык: Английский

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High-crystalline g-C3N4 photocatalysts: Synthesis, structure modulation, and H2-evolution application

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Год журнала: 2023, Номер 52, С. 127 - 143

Опубликована: Сен. 1, 2023

Язык: Английский

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A review of step-scheme photocatalysts

Applied Materials Today, Год журнала: 2022, Номер 29, С. 101609 - 101609

Опубликована: Авг. 18, 2022

Язык: Английский

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Localized Surface Plasmon Resonance Promotes Metal–Organic Framework‐Based Photocatalytic Hydrogen Evolution

Advanced Functional Materials, Год журнала: 2023, Номер 33(33)

Опубликована: Апрель 25, 2023

Abstract Combining metal nanoparticles (NPs) featured with localized surface plasmon resonance (LSPR) metal–organic framework (MOF)‐based photocatalysts is a novel means for achieving efficient separation of electron–hole pairs. Herein, the Au@NH 2 ‐UiO‐66/CdS composites are successfully synthesized by encapsulating Au NPs LSPR into NH ‐UiO‐66 nanocage, further growing CdS on ‐UiO‐66, which exhibits higher photocatalytic activity in hydrogen evolution reaction under visible‐light irradiation than that and CdS, respectively. Transient absorption measurements reveal MOF not only transit station electrons generated from to Au, but also receiver hot plasmonic Au@MOF/CdS composites. Thus, LSPR‐induced electron transfer an important manifestation prolong carrier lifetime enhance performance. This work provides insights investigating photoinduced dynamics nanomaterials effects enhancing MOF‐based

Язык: Английский

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