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

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 52, P. 127 - 143

Published: Sept. 1, 2023

Language: Английский

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Reversing Free‐Electron Transfer of MoS_2+x Cocatalyst for Optimizing Antibonding‐Orbital Occupancy Enables High Photocatalytic H₂ Evolution

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(25)

Published: April 25, 2023

The interaction between a co-catalyst and photocatalyst usually induces spontaneous free-electron transfer them, but the effect regulation of direction on hydrogen-adsorption energy active sites have not received attention. Herein, to steer in favorable for weakening S-Hads bonds sulfur-rich MoS2+x , an electron-reversal strategy is proposed first time. core-shell Au@MoS2+x cocatalyst was constructed TiO2 optimize antibonding-orbital occupancy. Research results reveal that embedded Au can reverse electron generate electron-rich S(2+δ)- sites, thus increasing occupancy cocatalyst. Consequently, increase effectively destabilizes H 1s-p antibonding orbital weakens bond, realizing expedited desorption Hads rapidly lot visible H2 bubbles. This work delves deep into latent carrier cocatalytic activity.

Language: Английский

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Increasing the Photocatalytic Hydrogen Generation Activity of CdS Nanorods by Introducing Interfacial and Polarization Electric Fields

Small, Journal Year: 2023, Volume and Issue: 19(46)

Published: July 20, 2023

Cadmium sulfide (CdS) is a photocatalyst widely used for efficient H2 production under visible light irradiation, due to its narrow bandgap and suitable conduction band position. However, the fast recombination of carriers results in their low utilization. In order improve photocatalytic hydrogen production, it reports successful introduction metallic Cd S vacancies on CdS nanorods (CdS NRs) by facile situ chemical reduction method, using thermal treatment process. This procedure generates interfacial polarization electric fields, that significantly performance NRs sodium sulfite aqueous solutions, irradiation (λ >420 nm). The these fields believed charge separation facilitate faster migration, resulting optimized catalyst, with evolution rate up 10.6 mmol-1 g-1 h-1 apparent quantum efficiency (AQE) 12.1% (420 nm), which 8.5 times higher than CdS. work provides useful method introduce metal photocatalysts build local high-performance production.

Language: Английский

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Charging d‐Orbital Electron of ReS_2+x Cocatalyst Enables Splendid Alkaline Photocatalytic H₂ Evolution

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(36)

Published: May 14, 2023

Abstract Rhenium disulfide (ReS 2 ) holds expansive perspective in photocatalytic water‐splitting field, but its H ‐production rate is severely impeded by the strong hydroxyl (OH ad adsorption on catalytic Re atoms. Herein, an ingenious strategy about charging d ‐orbital electrons of ReS 2+x cocatalyst integrating metallic Au explicitly clarified to effectively accelerate OH desorption for promoting alkaline ‐evolution activity. To this end, core‐shell Au@ReS nanostructures as cocatalysts are skillfully fabricated onto TiO a directional assembly pathway. Experimental and theoretical data validate free‐electron transfer from core S‐rich shell, thus essentially d‐orbital atoms construct active (4‐ δ )+ sites. The charged electron state raises antibonding occupancy OH bonds, thereby accelerating endowing efficient production water splitting. Moreover, can capture photogenerated unveiled operando Kelvin probe force microscopy. Consequently, optimized /Au@ReS photocatalyst achieves exceptional 6013.45 µmol h −1 g with releasing visual bubbles media. This research furnishes original insights orbital optimize strength between intermediates

Language: Английский

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Self-optimized H-adsorption affinity of CuRu alloy cocatalysts towards efficient photocatalytic H2 evolution

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 174, P. 168 - 175

Published: Aug. 26, 2023

Language: Английский

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Dual cocatalysts for photocatalytic hydrogen evolution: Categories, synthesis, and design considerations

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 54, P. 137 - 160

Published: Nov. 1, 2023

Language: Английский

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Directing charge transfer in a chemical-bonded Ni/Cd0.7Mn0.3S Schottky heterojunction for selective photocatalytic oxidation of benzyl alcohol structural organic platform molecules coupled with hydrogen evolution reaction

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 345, P. 123641 - 123641

Published: Dec. 30, 2023

Language: Английский

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Highly intra- and inter-plane crystalline ReS /g-C3N4: Facile synthesis and boosted photocatalytic H2 evolution

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147711 - 147711

Published: Nov. 27, 2023

Language: Английский

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Dual built-in spontaneous electric fields in an S-scheme heterojunction for enhanced photocatalytic H₂O₂ production

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(9), P. 2514 - 2521

Published: Jan. 1, 2024

A facile photodeposition method was used to selectively modify Cu 2 O and MnOOH on BiVO 4 . The improved H -production activity mainly attributed the dual built-in electric field in /Cu S-scheme heterojunction.

Language: Английский

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Synergistically regulating d-band centers of heterojunction redox sites by ligand effect for photocatalytic H2 evolution

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 524 - 531

Published: Jan. 23, 2024

Language: Английский

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