Selective oxygen reduction reaction: mechanism understanding, catalyst design and practical application

Chemical Science, Год журнала: 2024, Номер 15(29), С. 11188 - 11228

Опубликована: Янв. 1, 2024

The oxygen reduction reaction (ORR) is a key component for many clean energy technologies and other industrial processes. However, the low selectivity sluggish kinetics of ORR catalysts have hampered conversion efficiency real application these new mentioned before. Recently, tremendous efforts been made in mechanism understanding, electrocatalyst development system design. Here, comprehensive critical review provided to present recent advances field electrocatalytic ORR. two-electron four-electron transfer catalytic mechanisms evaluation parameters are discussed first. Then, up-to-date synthetic strategies

Язык: Английский

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Advancing H₂O₂ electrosynthesis: enhancing electrochemical systems, unveiling emerging applications, and seizing opportunities

Chemical Society Reviews, Год журнала: 2024, Номер 53(16), С. 8137 - 8181

Опубликована: Янв. 1, 2024

Hydrogen peroxide (H

Язык: Английский

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Recent advances and challenges of double-atom catalysts in diverse environmental applications: A state-of-the-art review

Coordination Chemistry Reviews, Год журнала: 2025, Номер 532, С. 216545 - 216545

Опубликована: Фев. 19, 2025

Язык: Английский

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Site-designed dual-active-center catalysts for co-catalysis in advanced oxidation processes

npj Materials Sustainability, Год журнала: 2025, Номер 3(1)

Опубликована: Янв. 7, 2025

Abstract Advanced Oxidation Processes (AOPs) are promising for treating persistent pollutants, yet challenges arise due to the step-wise oxidants activation process, which traditional single-active-center catalysts struggle facilitate effectively. Recently, dual-active-center have emerged as a solution by enabling synergistic reactions. This review covers advances in these catalysts, their co-catalytic mechanisms, and applications electro-Fenton, photocatalytic, peroxymonosulfate-, pollutant-as-electron-donor based Fenton-like processes, along with active site design considerations future challenges.

Язык: Английский

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Accelerated O2 adsorption and stabilized *OOH for electrocatalytic H2O2 production

Journal of Material Science and Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Atomically Dispersed Co/Mo Sites Anchored on Mesoporous Carbon Hollow Spheres for Highly Selective Oxygen Reduction to Hydrogen Peroxide in Acidic Media

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 14, 2025

Abstract Two‐electron oxygen reduction reaction (2e − ORR) in acidic media is a promising route for the decentralized and on‐site hydrogen peroxide (H 2 O ) generation. Nevertheless, strong interaction between active sites * OOH intermediates usually induces O─O bond cleavage to convert 2e pathway into sluggish 4e ORR. Therefore, it highly necessary optimize electronic structure of ORR electrocatalysts regulation adsorption energy. Herein, we propose utilization atomically dispersed Co/Mo anchored on mesoporous carbon hollow spheres (Co/Mo‐MCHS) via template‐engaged strategy selective H acid. Benefitting from electron‐donating effect Mo atoms, an enriched electron density around Co center Co/Mo‐MCHS observed, resulting optimal key approach apex volcano plot. Moreover, introduction species simultaneously suppresses electroreduction as‐obtained sites. As consequence, delivers high selectivity 90–95% The flow cell based catalyst achieves remarkable yield 2102 mg 150 h. this can be extended other early transition metal elements with similar modifier effects.

Язык: Английский

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Tuning the Formation Kinetics of *OOH Intermediate with Hollow Bowl-Like Carbon by Pulsed Electroreduction for Enhanced H₂O₂ Production

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 28, 2025

The electrochemical synthesis of hydrogen peroxide (H2O2) via the two-electron oxygen reduction reaction (2e- ORR) is a promising alternative to conventional anthraquinone method. However, due local alkalinization near catalyst surface, restricted replenishment and insufficient activated water molecule supply limit formation key *OOH intermediate. Herein, pulsed electrocatalysis approach based on structurally optimized S/N/O tridoped hollow carbon bowl has been proposed overcome this challenge. In an H-type electrolytic cell, method achieves superior H2O2 yield rate 55.6 mg h-1 mgcat.-1, approximately 1.6 times higher than potentiostatic (34.2 mgcat.-1), while maintaining Faradaic efficiency above 94.6%. situ characterizations, finite element simulations, density functional theory analyses unveil that application potentials mitigates OH- concentration, enhances activation proton generation, facilitates production within bowl-like structure. These effects synergistically accelerate kinetics intermediate by efficient generation *O2 *H2O intermediates, leading yields. This work develops strategy tune catalytic environments for diverse applications.

Язык: Английский

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Metal–Organic Frameworks Derived Carbon‐Supported Metal Electrocatalysts for Energy‐Related Reduction Reactions

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(38)

Опубликована: Июнь 21, 2024

Electrochemical reduction reactions, as cathodic processes in many energy-related devices, significantly impact the overall efficiency determined mainly by performance of electrocatalysts. Metal-organic frameworks (MOFs) derived carbon-supported metal materials have become one star electrocatalysts due to their tunable structure and composition through ligand design screening. However, for different electroreduction required active species vary phase component, electronic state, catalytic center configuration, hence requiring effective customization. From this perspective, review comprehensively analyzes structural principles, loading strategies, practical performance, complex mechanisms, thereby providing insights guidance future rational such catalysts.

Язык: Английский

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In situ/Operando Investigation for Heterogeneous Electro-Catalysts: From Model Catalysts to State-of-the-Art Catalysts

ACS Energy Letters, Год журнала: 2024, Номер 9(9), С. 4414 - 4440

Опубликована: Авг. 17, 2024

Electrochemical reactions, including water splitting, oxygen reduction, hydrogen oxidation, carbon dioxide nitrogen oxide etc., are critical for sustainable energy conversion and storage. Achieving high efficiency in these reactions requires catalysts with superior activity, selectivity, stability, often realized through nanostructured metal catalysts. However, practical challenges such as low selectivity catalytic degradation persist. In situ operando characterization techniques offer real-time insights into catalyst behavior under reaction conditions, enabling a deeper understanding of structure–performance relationships and, therefore, guiding the design optimization electro-catalysts. This review discusses common situ/operando techniques, highlights their applications model catalysts, single-atom single-crystal further explores combinational analysis to study complex nanocatalysts. Finally, we provide suggestions perspectives on development advance field electrochemical catalysis.

Язык: Английский

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Metal-organic-framework-derived dual-atom catalysts: from synthesis to electrocatalytic applications

Materials Science and Engineering R Reports, Год журнала: 2024, Номер 162, С. 100886 - 100886

Опубликована: Ноя. 23, 2024

Язык: Английский

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