Small, Journal Year: 2024, Volume and Issue: 20(27)
Published: Jan. 24, 2024
It is a challenge to regulate charge separation dynamics and redox reaction kinetics at the atomic level synergistically boost photocatalytic hydrogen (H
Language: Английский
Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(23)
Published: March 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.
Language: Английский
Citations
126
Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 439, P. 135758 - 135758
Published: March 12, 2022
Language: Английский
Citations
122
Chemosphere, Journal Year: 2022, Volume and Issue: 303, P. 135085 - 135085
Published: May 23, 2022
Language: Английский
Citations
120
Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(13)
Published: Feb. 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.
Language: Английский
Citations
100
Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(13), P. 6835 - 6871
Published: Jan. 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.
Language: Английский
Citations
93
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(5), P. 3241 - 3249
Published: Jan. 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
Language: Английский
Citations
91
CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 52, P. 127 - 143
Published: Sept. 1, 2023
Language: Английский
Citations
90
Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 313, P. 121470 - 121470
Published: May 3, 2022
Language: Английский
Citations
88
Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)
Published: April 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
Language: Английский
Citations
82
Applied Materials Today, Journal Year: 2022, Volume and Issue: 29, P. 101609 - 101609
Published: Aug. 18, 2022
Language: Английский
Citations
81