Single-atom catalysts for photocatalytic energy conversion

Joule, Journal Year: 2022, Volume and Issue: 6(1), P. 92 - 133

Published: Jan. 1, 2022

Artificial photocatalytic energy conversion represents a highly intriguing strategy for solving the crisis and environmental problems by directly harvesting solar energy. The development of efficient photocatalysts is central task pushing real-world application reactions. Due to maximum atomic utilization efficiency distinct advantages outstanding catalytic activity, single-atom catalysts (SACs) have emerged as promising candidates photocatalysts. In current review, recent progresses challenges on SACs systems are presented. Fundamental principles focusing charge separation/transfer molecular adsorption/activation photocatalysis systemically explored. We outline how isolated reactive sites facilitate photogenerated electron–hole transfer promote construction photoactivation cycles. widespread adoption in diverse reactions also comprehensively introduced. By presenting these advances addressing some future with potential solutions related integral over SACs, we expect shed light forthcoming research conversion.

Language: Английский

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Engineering Single-Atom Active Sites on Covalent Organic Frameworks for Boosting CO₂ Photoreduction

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(37), P. 17097 - 17109

Published: Sept. 6, 2022

Solar carbon dioxide (CO2) conversion is an emerging solution to meet the challenges of sustainable energy systems and environmental/climate concerns. However, construction isolated active sites not only influences catalytic activity but also limits understanding structure-catalyst relationship CO2 reduction. Herein, we develop a universal synthetic protocol fabricate different single-atom metal (e.g., Fe, Co, Ni, Zn, Cu, Mn, Ru) anchored on triazine-based covalent organic framework (SAS/Tr-COF) backbone with bridging structure metal-nitrogen-chlorine for high-performance Remarkably, as-synthesized Fe SAS/Tr-COF as representative catalyst achieved impressive CO generation rate high 980.3 μmol g-1 h-1 selectivity 96.4%, over approximately 26 times higher than that pristine Tr-COF under visible light irradiation. From X-ray absorption fine analysis density functional theory calculations, superior photocatalytic performance attributed synergic effect atomically dispersed host, decreasing reaction barriers formation *COOH intermediates promoting adsorption activation well desorption. This work affords rational design state-of-the-art catalysts at molecular level provides in-depth insights efficient conversion.

Language: Английский

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Covalent organic frameworks for photocatalysis: Synthesis, structural features, fundamentals and performance

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214889 - 214889

Published: Oct. 15, 2022

Language: Английский

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Metalated covalent organic frameworks: from synthetic strategies to diverse applications

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(15), P. 6307 - 6416

Published: Jan. 1, 2022

This review highlights the recent advances of metalated covalent organic frameworks, including synthetic strategies and applications, discusses current challenges future directions.

Language: Английский

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Piezo‐Photocatalytic Synergy in BiFeO₃@COF Z‐Scheme Heterostructures for High‐Efficiency Overall Water Splitting

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(44)

Published: Sept. 13, 2022

Solar-driven overall water splitting is an ideal way to generate renewable energy while still challenging. For the first time, this work combined covalent organic frameworks (COFs) and piezoelectric material by linkages form Z-scheme core@shell heterostructure for splitting. Benefiting from synergistic effect between polarized electric field photo-generated charges, as well precise adjustment of shell thickness, carrier separation utilization efficiency greatly improved. The optimal BiFeO3 @TpPa-1-COF photocatalyst revealed hydrogen (H2 ) oxygen (O2 production rates 1416.4 708.2 μmol h-1 g-1 under excitation ultrasonication coupled with light irradiation, which best performance among various piezo- COF-based photocatalysts. This provides a new sight practical application highly efficient photocatalytic

Language: Английский

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W–N Bonds Precisely Boost Z-Scheme Interfacial Charge Transfer in g-C₃N₄/WO₃ Heterojunctions for Enhanced Photocatalytic H₂ Evolution

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(16), P. 9994 - 10003

Published: Aug. 2, 2022

Exploring and achieving precise electron-transfer channels in the interface of Z-scheme heterojunctions are essential have been considered as immense challenges. A strategy to precisely connect valence band (VB) site g-C3N4 (CN) with conduction (CB) WO3 through tungsten–nitrogen (W–N) bond was developed create a chemically bonded heterojunction photocatalyst. Because this reason, photogenerated electrons from CB could be accurately directly injected into VB CN, following direct charge separation pathways. The photocatalytic hydrogen production rate optimal CNWB 482 μmol h–1, 4.3 times higher than that CN/WO3 without an N–W (CNWU). also shows better evolution activity previous systems. Theoretical experimental results further confirm newly formed bonds become metallic, which act atomic-level interfacial accelerate electron transfer shorten distance, thus substantially boosting H2 generation. This work paves way design synthesize atomic precision for interesting applications future.

Language: Английский

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Single atoms meet metal–organic frameworks: collaborative efforts for efficient photocatalysis

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(9), P. 3722 - 3749

Published: Jan. 1, 2022

MOF-supported single atom materials offer great potential for design and engineering of advanced photocatalysts energy conversion applications. State-of-the-art prospects in recent breakthroughs are presented this review.

Language: Английский

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Covalent Organic Frameworks for Energy Conversion in Photocatalysis

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(34)

Published: April 24, 2023

Abstract Intensifying energy crises and severe environmental issues have led to the discovery of renewable sources, sustainable conversion, storage technologies. Photocatalysis is a green technology that converts eco‐friendly solar into high‐energy chemicals. Covalent organic frameworks (COFs) are porous materials constructed by covalent bonds show promising potential for converting chemicals owing their pre‐designable structures, high crystallinity, porosity. Herein, we highlight recent progress in synthesis COF‐based photocatalysts applications water splitting, CO 2 reduction, H O production. The challenges future opportunities rational design COFs advanced discussed. This Review expected promote further development toward photocatalysis.

Language: Английский

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Covalent organic frameworks towards photocatalytic applications: Design principles, achievements, and opportunities

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214882 - 214882

Published: Oct. 14, 2022

Language: Английский

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Bifunctional TiO2/COF S-scheme photocatalyst with enhanced H2O2 production and furoic acid synthesis mechanism

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 333, P. 122780 - 122780

Published: April 25, 2023

Language: Английский

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