Asymmetric Bridging Multi‐Active Sites in a‐NiSeS Cocatalyst for Upgrading Photocatalytic H₂ Evolution

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Cocatalyst‐coupled photocatalytic system offers an attractive tactic to produce eco‐friendly H 2 fuel from renewable water and sunlight. However, the efficiency of single homologous active site in current cocatalysts is seriously restricted by opposite binding‐energy requirement for hydrogen adsorption desorption. Herein, asymmetric strategy bridging multi‐active sites validated break strong relevancy adsorption–desorption rate on designed amorphous NiSeS (a‐NiSeS) cocatalyst. It found that S–Ni–Se modules with self‐optimized electron‐rich S (2+δ)− electron‐deficient Se (2‐δ)− atoms can induce transfer synchronously realizing fast Consequently, TiO /a‐NiSeS photocatalyst delivers a significantly enhanced ‐evolution activity 8216 µmol h −1 g , which 2.5 3.3 times higher than /a‐NiS /a‐NiSe, respectively. The improved ascribed unique synergistic mechanism sites, namely, works as hydrogen‐rich center, thermodynamically neutral bridge functions mediator rapidly transferring while expedites desorption free . This work provides atomic‐level insight into underlying cocatalytic

Language: Английский

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Triggering the Channel‐Sulfur Sites in 1T′‐ReS₂ Cocatalyst toward Splendid Photocatalytic Hydrogen Generation

Small, Journal Year: 2023, Volume and Issue: 19(45)

Published: July 7, 2023

Abstract Electron density manipulation of active sites in cocatalysts is great essential to realize the optimal hydrogen adsorption/desorption behavior for constructing high‐efficient H 2 ‐evolution photocatalyst. Herein, a strategy about weakening metal–metal bond strength directionally optimize electron channel‐sulfur(S) 1T′ Re 1− x Mo S cocatalyst clarified improve their adsorption (S─H bond) rapid ‐production reaction. In this case, ultrathin nanosheet situ anchored on TiO surface form /TiO photocatalyst by facial molten salt method. Remarkably, numerous visual bubbles are constantly generated 0.92 0.08 sample with 10.56 mmol g −1 h rate (apparent quantum efficiency 50.6%), which 2.6 times higher than that traditional ReS sample. Density functional theory and situ/ex X‐ray photoelectron spectroscopy results collectively demonstrate weakened Re─Re via introduction can induce formation unique electron‐deficient channel‐S suitable density, yield thermoneutral S─H bonds superior interfacial ‐generation performance. This work provides fundamental guidance purposely optimizing electronic state manipulating intrinsic bonding structure, opens an avenue designing efficacious photocatalytic materials.

Language: Английский

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Consecutive Regulation of H* Adsorption Equilibrium via Selenium-Enriched Engineering for Boosted Photocatalytic Hydrogen Evolution

ACS Catalysis, Journal Year: 2024, Volume and Issue: unknown, P. 15444 - 15455

Published: Oct. 3, 2024

Language: Английский

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Protruding‐Shaped Co Polarization Field on Ultrathin Covalent Triazine Framework Nanosheets for Efficient CO₂ Photoreduction

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(33)

Published: June 2, 2024

Abstract Single‐atom photocatalysts (SAPs) engineered on various supports offer a promising pathway to efficiently convert CO 2 into high‐valued products. However, most SAPs with near‐planar metal atom coordination structure suffer from low conversion efficiency, mainly due the weak local polarized electric field which retards reaction kinetics. Herein, this study reports for first time photocatalyst simultaneously integrates protruding‐shaped Co single and strong polarization in ultrathin crystalline covalent‐triazine‐framework nanosheets (donate as 1 /CTF‐NSs). Both experimental results theoretical simulations demonstrated that giant is successfully triggered /CTF‐NSs, induced directional charge migration greatly promoted separation of photogenerated carriers. The protruding‐Co centers enhanced overlap between 2p 3d orbitals, thereby facilitating affinity adsorption. Furthermore, fields drove injection substantial number electrons π antibonding leading effective activation reduction molecules. Consequently, as‐synthesized /CTF‐NSs exhibited remarkable production rate 5391 µmol g −1 h high selectivity (97.3%) under visible light irradiation, represents one best molecular framework date.

Language: Английский

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Nanoflower-like graphitic carbon nitride aerogel: Artful cyanuric acid-controlled synthesis and enhanced photocatalytic hydrogen evolution activity

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 654, P. 268 - 278

Published: Oct. 11, 2023

Language: Английский

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Anchoring NiSx (x=0, 1, 2) on porous g-C3N4 (PCN) to enhance photocatalytic H2 production: The effect of S element on H2 evolution

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 79, P. 1357 - 1364

Published: July 14, 2024

Language: Английский

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Platinum-induced nanolization and electron-deficient gold in platinum@gold cocatalyst for efficient photocatalytic hydrogen peroxide production

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 1249 - 1258

Published: Sept. 25, 2024

Language: Английский

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An ultrafast H* migration channel and oxidation activity driven by multifunctional Co atoms on twin Co0.01Mn0.29Cd0.7S homojunction surface for photocatalytic overall water splitting

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 470, P. 143898 - 143898

Published: June 5, 2023

Language: Английский

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2D Molybdenum Carbide MXene Cocatalyst: Synthesis, Modification, and Photocatalysis

Solar RRL, Journal Year: 2023, Volume and Issue: 7(22)

Published: Sept. 17, 2023

Photocatalytic technology is considered as one of effective approaches to address increasingly serious problems environment and energy. To boost the photocatalytic efficiency, innovative cocatalysts have been extensively explored investigated in recent years. Mo 2 C MXene a new two‐dimensional layer cocatalyst gained increasing attentions for promoting performance owing high specific surface area, excellent hydrophilic surface, outstanding metallic conductivity, flexible adjustability sites. However, compared with traditional Ti 3 cocatalyst, has not fully systematically summarized published articles field. In this review, advances about synthesis, modification, applications, our outlook are comprehensively summarized. First, synthetic methods introduced, including top‐down route down‐top route. Moreover, four modification strategies (constructing heterojunction, doping heteroatom, controlling morphology, modifying termination) illustrated. Subsequently, applications H production, CO reduction, pollutants degradation thoroughly discussed. Finally, crucial challenges important outlooks solar‐to‐fuel conversion proposed deliver novel insights design high‐efficiency cocatalyst‐modified photocatalysts.

Language: Английский

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Single-atom Pd anchored in the porphyrin-center of ultrathin 2D-MOFs as the active center to enhance photocatalytic hydrogen-evolution and NO-removal

Chinese Chemical Letters, Journal Year: 2023, Volume and Issue: 35(9), P. 109455 - 109455

Published: Dec. 26, 2023

Language: Английский

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