Self‐Reconstructed Spinel with Enhanced SO₄²⁻ Adsorption and Highly Exposed Co³⁺ From Heterostructure Boosts Activity and Stability at High Current Density for Overall Water Splitting

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Abstract Developing overall water splitting non‐noble metal electrocatalysts achieving long‐term stability with high activity at industrial‐grade current density remains challenging. Herein, a self‐reconstruction strategy of Co 9 S 8 ‐Ni 3 2 /NCF is employed to fabricate Ni x 3‐x O 4 ‐Ov‐ in which partial replaced by the structure. The reconstructed ‐Ov can enhance adsorbing ability leached from initial phase compared spinel, exceeding 1000‐h oxygen evolution reaction (OER) and 600‐h 1000 mA cm −2 excellent activity. In situ Raman X‐ray photoelectron spectroscopy (XPS) results indicate that substitution for atoms enhances adsorption capacity on ‐Ov, facilitating formation high‐density 3+ active sites (400) expedited interfacial electron transfer densities. Density functional theory (DFT) calculations reveal stabilizes surface vacancies optimizes energy intermediates, thereby improving both catalytic performance. findings provide new insights into overcoming activity‐stability trade‐off contribute design

Язык: Английский

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Fabrication of TiO₂/MOF Type II Heterojunction by Growth of TiO₂ on Cr-Based MOF for Enhanced Photocatalytic Hydrogen Production

Crystal Growth & Design, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

MOF-based heterojunctions can significantly enhance the efficiency of photocatalytic hydrogen production; however, construction efficient remains a formidable challenge. In this study, we successfully developed series Type II by growing TiO2 on Cr-based MOF, thereby regulating generation, separation, and transportation photogenerated charge carriers to improve evolution performance. Among these, 23%TiO2/MIL-101(Cr) photocatalyst exhibited highest production activity, achieving 884.01 μmol g–1 in just 5 h, which is 6.8 6.0 times that pure MIL-101(Cr) TiO2, respectively. Additionally, demonstrated excellent cyclic stability. Tiny particles were proven mainly deposited surface N2 sorption isotherm analyses, transmission electron microscopy (TEM), high-resolution TEM, high-angle annular dark field scanning microscopy, etc. Characterization techniques such as situ XPS confirmed formation TiO2/MIL-101(Cr) heterostructure. Band structure analysis indicates meets thermodynamic requirements for production. Furthermore, transient photocurrent measurements, electrochemical impedance analysis, photoluminescence reveal possesses superior capabilities carrier transport, resulting from kinetic perspective. This research offers valuable insights into preparation development photocatalysts

Язык: Английский

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Directed Regulation of Proton Transport Pathways in MOF-808

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

The directed regulation of proton transport pathways in conductors, facilitated by the well-defined crystal structures metal–organic frameworks (MOFs), is important for development advanced materials. In this study, MOF-808-2.5SO4-His synthesized progressive modification on framework using functional molecules. incorporation sulfate and imidazole groups into results a high conductivity 1.37 × 10–2 S cm–1 at 70 °C 98% relative humidity (RH). analysis temperature-dependent indicates that facilitates through Grotthuss mechanism RH temperature range 30–70 °C. Additionally, exhibits good cycling stability durability performance. This feasible approach enhances comprehension transfer promotes viable strategies controllable construction conductors.

Язык: Английский

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Enhanced CO₂ Capture and Separation with Amino Poly(carboxylic acid) Ionic Liquids@MIL-101: Tailored Functionality for Superior Performance

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Язык: Английский

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Cu/Cu₂O/NH₂-MIL-88B (Fe) heterojunction as the photocatalyst to remove hexavalent chromium heavy metal ions in water

RSC Advances, Год журнала: 2025, Номер 15(4), С. 2462 - 2469

Опубликована: Янв. 1, 2025

Cu/Cu 2 O/NH -MIL-88B (Fe) heterojunction material under the condition of pH = 2, ethanol as a sacrificial agent, dark adsorption for 60 min, photocatalytic reduction 150 rate Cr( vi ) was 96.3%.

Язык: Английский

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Research progress in photocatalytic carbon dioxide reduction performance of covalent organic frameworks

Scientia Sinica Chimica, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Bringing Porous Framework Materials toward Photocatalytic H₂O₂ Production

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

Photocatalytic H2O2 production driven by renewable solar energy is a promising and sustainable approach, with porous framework materials such as metal-organic frameworks (MOFs), covalent organic (COFs), hydrogen-bonded (HOFs) emerging highly efficient catalysts. This Review first presents the current research state of in photosynthesis, focusing on progress across different mechanism insights gained through advanced techniques. Furthermore, systematic categorization material modifications aimed at enhancing photocatalytic efficiency provided, linking structural to improved performance. Key factors charge carrier separation transfer, reaction pathways, stability are comprehensively analyzed. Finally, challenges related stability, scalability, cost-effectiveness, discussed alongside opportunities for future advancements. aims provide into understanding optimizing scalable photosynthesis.

Язык: Английский

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Achieving Dynamic Circularly Polarized Luminescence with 2D Hydrogen‐Bonded Organic Frameworks

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Significant advances have been made in the preparation and application of luminescent hydrogen-bonded organic frameworks (HOFs) recent years. These materials exhibit unique structural flexibility accommodating guest molecules, rendering them promising candidates for dynamic applications. Herein, a 2D HOF material is presented, constructed by binary assembly 5,5'-bis(azanediyl)oxalyl diisophthalic acid tetra(pyrid-4-ylphenyl)ethylene to achieve circularly polarized luminescence (CPL) with aid chiral guests. Efficient chirality transfer CPLs are realized incorporating carvone molecules into 1D channels HOFs through hydrogen bonding. As result interlayer contraction upon desorption, these display emission colors varying from cyan yellow. The method bonding-enhanced host-guest combination desorption-triggered provides simple chiroptical properties porous materials.

Язык: Английский

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A porous anthraquinone-porphyrin-based covalent organic framework for photocatalytic oxidation of amines to aldehydes

Journal of Molecular Structure, Год журнала: 2025, Номер unknown, С. 142061 - 142061

Опубликована: Март 1, 2025

Язык: Английский

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Boosting photocatalytic H2 evolution on g-C3N4 through Cu/Ni dual cocatalysts: Unraveling synergistic root on charge dynamics and *H adsorption/desorption

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163200 - 163200

Опубликована: Апрель 1, 2025

Язык: Английский

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