Regulated Dual Defects of Bridging Organic and Terminal Inorganic Ligands in Iron‐based Metal‐Organic Framework Nodes for Efficient Photocatalytic Ammonia Synthesis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 8, 2024

Engineering advantageous defects to construct well-defined active sites in catalysts is promising but challenging achieve efficient photocatalytic NH

Language: Английский

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Stabilizing Ni²⁺ in Hollow Nano MOF/Polymetallic Phosphides Composites for Enhanced Electrochemical Performance in 3D‐Printed Micro‐Supercapacitors

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: March 26, 2024

Polymetallic phosphides exhibit favorable conductivities. A reasonable design of nano-metal-organic frame (MOF) composite morphologies and in situ introduction polymetallic into the framework can effectively improve electrolyte penetration rapid electron transfer. To address existing challenges, Ni, with a strong coordination ability N, is introduced to partially replace Co nano-Co-MOF composite. The hollow nanostructure stabilized through CoNi bimetallic low-temperature controllable phosphide generation rate. Co, P atoms, generated during reduction, enhance transfer rate within framework. X-ray absorption fine structure (XAFS) characterization results further confirm existence Ni-N, Ni-Ni, Co-Co structures nanocomposite. changes each component charge-discharge process electrochemical reactions are investigated using diffraction (XRD). Theoretical calculations that conductivity. VZNPGC//MXene MSCs, constructed active materials derived from nano MOF composites synthesized Ni

Language: Английский

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The Role of Point Defects in Heterojunction Photocatalysts: Perspectives and Outlooks

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: July 22, 2024

Abstract The development of efficient photocatalysts is a mainstay for the advancement photocatalytic technology. Heterojunction can overcome inherent limitations single photocatalysts, integrating advantages each component, and achieving separation photogenerated charges, making them research focus in field photocatalysis. role point defects reactions diverse significantly influence performance photocatalysts. This review comprehensively summarizes latest advancements defect engineering modulation heterojunction First, types their impact on processes are introduced. Subsequently, common presented. Then, accordance with recent progress, regulatory mechanisms within outlined, particular functions surface/interfacial properties charge transfer processes. Finally, challenges faced by optimizing promising solutions proposed. provides an in‐depth understanding expectation offering insights into highly active materials.

Language: Английский

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Unveiling the Mechanism of Aerobic Photocatalytic Nitrogen Fixation over Dynamic Structural Renovation on Bi₂MO₆ (M = Mo, W)

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(18), P. 13542 - 13549

Published: Aug. 28, 2024

The aerobic photocatalytic nitrogen reduction reaction (pNRR) is the synthesis of ammonia with air (N2/O2) instead a high-purity source, which can avoid use high-cost separation equipment, thus reducing production cost synthetic ammonia. Nevertheless, mechanism effect oxygen (O2) on structure and catalytic performance photocatalysts in pNRR still unclear. Herein, trace Bi0 loaded Bi2MO6 (M = Mo, W) was ingeniously synthesized by solvothermal strategy, demonstrated superior performance. elucidated quasi situ X-ray photoelectron spectroscopy, electron spin resonance density functional theory calculation. presence O2 inhibited formation excess competing for photogenerated electrons generating ·O2–, dynamically renovated catalyst. polarization dipole field induced an appropriate amount boosted photocarrier spatial separation/transfer pNRR.

Language: Английский

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Defect modulation of MIL-68(Fe) MOFs by Cu doping for boosting photocatalytic N2 fixation

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 432, P. 115436 - 115436

Published: March 11, 2024

Language: Английский

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Defect Engineering on Metal-Organic Frameworks for Enhanced Photocatalytic Reduction of Cr(VI)

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: unknown, P. 105174 - 105174

Published: Sept. 1, 2024

Language: Английский

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Oxygen Vacancy in Accelerating the Electrocatalytic Small Molecule Oxidation Properties

Electrochemical Energy Reviews, Journal Year: 2025, Volume and Issue: 8(1)

Published: Feb. 27, 2025

Language: Английский

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Synergistic plasmon resonance hybridization of iron‐dispersed MoO_3−x/MXene for enhanced nitrogen photothermal reduction

AIChE Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract Plasmonic photochemical N 2 fixation has received widespread attention owing to the attractive plasmonic enhancement effects in improving solar‐to‐NH 3 conversion efficiency. However, weak adsorption affinity metallic photocatalysts and insurmountable interfacial barriers metal–semiconductor lead rapid charge carrier recombination instead of participating ‐to‐NH conversion. Herein, a photothermal catalyst Fe‐dispersed MoO 3− x /MXene with synergistic plasmon resonance hybridization structure is fabricated for fixation. The hybrid derived from MXene induce strong optical response across ultraviolet–visible‐near‐infrared range generation energetic carriers, induced effect further accelerates electron extraction, transport, surface reaction kinetics. Moreover, abundant oxygen vacancies Fe sites can intensify donate electrons into anti‐bonding system stimulative NH coupling process. A high NH formation rate 87.1 μmol g −1 h achieved under solar‐level illumination.

Language: Английский

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Enhancing the stability and efficiency of eye-sensitized solar cells with MIL-125 metal-organic framework as an electrolyte additive

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 18, 2025

This study investigates how to improve the stability of liquid electrolyte (LE) dye-sensitized solar cells (DSSCs) by incorporating a titanium-based metal-organic framework (MIL-125). MIL-125, created through coordination Ti4+ ions with benzene-1,4-dicarboxylic acid, forms structure that can effectively accommodate I−/I3− electrolytes, resulting in MIL-125@electrolyte assembly. innovative assembly successfully prevents leakage while preserving LE properties. The examines enhances both and power conversion efficiency (PCE) DSSCs. inclusion large-surface-area MIL-125 improves ionic conductivity, reduces charge transfer resistance, stops leakage. optimized achieves high PCE 10.51%, peak value 10.99%, notable short-circuit current density 20.97 mA/cm², peaking at 22.27 under standard AM 1.5, 100 mW/cm² conditions. It maintains about 75% its after 1400 h approximately 23 °C. For indoor applications using LED lighting, quasi-solid-state DSSC reaches record 27.6%, an average 25.9%, 6000 lx illumination.

Language: Английский

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Regulating concentration of surface oxygen vacancies in Bi2MoO6/Bi-MOF for boosting photocatalytic ammonia synthesis

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 433, P. 115489 - 115489

Published: April 10, 2024

Language: Английский

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