Understanding Advanced Transition Metal‐Based Two Electron Oxygen Reduction Electrocatalysts from the Perspective of Phase Engineering

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 8, 2024

Abstract Non‐noble transition metal (TM)‐based compounds have recently become a focal point of extensive research interest as electrocatalysts for the two electron oxygen reduction (2e − ORR) process. To efficiently drive this reaction, these TM‐based must bear unique physiochemical properties, which are strongly dependent on their phase structures. Consequently, adopting engineering strategies toward structure has emerged cutting‐edge scientific pursuit, crucial achieving high activity, selectivity, and stability in electrocatalytic This comprehensive review addresses intricate field applied to non‐noble 2e ORR. First, connotation fundamental concepts related kinetics thermodynamics succinctly elucidated. Subsequently, focus shifts detailed discussion various approaches, including elemental doping, defect creation, heterostructure construction, coordination tuning, crystalline design, polymorphic transformation boost or revive ORR performance (selectivity, stability) catalysts, accompanied by an insightful exploration phase‐performance correlation. Finally, proposes fresh perspectives current challenges opportunities burgeoning field, together with several critical directions future development electrocatalysts.

Language: Английский

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Polymethylhydrosiloxane-modified gas-diffusion cathode for more efficient and durable H2O2 electrosynthesis in the context of water treatment

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 343, P. 123467 - 123467

Published: Nov. 4, 2023

On-site H2O2 electrosynthesis via two-electron oxygen reduction reaction (ORR) is attracting great interest for water treatment. The use of carbon black-based gas-diffusion electrodes (GDEs) especially appealing, but their activity, selectivity and long-term stability must be improved. Here, a facile GDEs modification strategy using trace polymethylhydrosiloxane (PMHS) allowed outstanding production, outperforming the conventional polytetrafluoroethylene (PTFE)-GDE (1874.8 vs 1087.4 mg L-1 at 360 min). superhydrophobicity conferred by PMHS endowed catalytic layer with high faradaic efficiencies (76.2%-89.7%) during operation 60 h. electrochemical tests confirmed activity PMHS-modified GDE. Moreover, efficient degradation several micropollutants electro-Fenton process demonstrated potential new An in-depth understanding roles functional groups provided from DFT calculations: −CH3 contribute to form superhydrophobic interface, whereas Si-H as-formed Si-O-C sites modulate coordination environment active centers.

Language: Английский

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Hydrogen peroxide electrogeneration from O2 electroreduction: A review focusing on carbon electrocatalysts and environmental applications

Chemosphere, Journal Year: 2024, Volume and Issue: 352, P. 141456 - 141456

Published: Feb. 15, 2024

Language: Английский

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Roles of Oxygen‐Containing Functional Groups in Carbon for Electrocatalytic Two‐Electron Oxygen Reduction Reaction

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(29)

Published: March 15, 2024

Recent years have witnessed great research interests in developing high-performance electrocatalysts for the two-electron (2e

Language: Английский

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Carbon powder from sugarcane bagasse: controlled synthesis for on-demand H2O2 electrogeneration

Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 122715 - 122715

Published: Feb. 1, 2025

Language: Английский

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Using Au NPs anchored on ZrO2/carbon black toward more efficient H2O2 electrogeneration in flow-by reactor for carbaryl removal in real wastewater

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 452, P. 139598 - 139598

Published: Oct. 8, 2022

Language: Английский

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Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂

ChemPhotoChem, Journal Year: 2022, Volume and Issue: 7(5)

Published: Dec. 28, 2022

Abstract Hydrogen peroxide (H 2 O ) can be considered as one of the world's indispensable chemicals. However, synthetic process prompt several severe environmental and human health issues. solar H production may provide opportunities to mitigate such Graphitic carbon nitride (g‐C 3 N 4 has emerged promising material for photocatalytic applications due its unique properties. Although tremendous efforts in engineering g‐C have been proposed improve catalytic results, materials obtained still some Additionally, mechanisms behind by using are not yet fully understood. Herein, we conducted a literature survey reviewing ‐based materials. The essential aspects current challenges generation discussed, which insight researchers overcome barriers develop sustainable methods production.

Language: Английский

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Valorization of polluted biomass waste for manufacturing sustainable cathode materials for the production of hydrogen peroxide

Electrochimica Acta, Journal Year: 2023, Volume and Issue: 456, P. 142383 - 142383

Published: April 10, 2023

A circular economy approach was followed to convert biomass wastes polluted with metals (obtained from phytoremediation processes) generate electroactive carbon materials be used in the electrochemical production of hydrogen peroxide. Carbon were pretreated using hydrothermal carbonization at 200ºC and 130 g soil mL−1 water post treated through pyrolysis different temperatures (300ºC, 500ºC 1000ºC) chemical precursors as KOH or H3PO4. These would modify paper (CP) cathodes substitute commonly black (CB), that comes fossil fuels. Porosity, thermochemical behavior, electrical conductivity, electrocatalytic response H2O2 accumulation tests evaluated determine potential performance these Delays mass losses observed thermogravimetric studies indicate improvement thermal stability which are related highest conductivity (that correspond hydrochar pyrolyzed 1000 ºC). High specific surface areas (1097 704 m2/g) also found hydrochars values even superior commercial CB. Results show all activated present activity towards peroxide chemically can achieve a 70% obtained Moreover, it presence synthesized may promote Fenton-like reaction, increasing by 40% generation hydroxyl radicals respect This paramount finding opens window for use this waste produce sustainable electrode upgraded advanced oxidation processes.

Language: Английский

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Technoeconomic Assessment of Electrochemical Hydrogen Peroxide Production with Gas Diffusion Electrodes under Scenarios Relevant to Practical Water Treatment

ACS ES&T Engineering, Journal Year: 2023, Volume and Issue: 3(11), P. 1800 - 1812

Published: Aug. 23, 2023

Recent studies have shown that electrochemically producing hydrogen peroxide (H2O2) with gas diffusion electrodes (GDEs) directly in the water to be treated by H2O2-based advanced oxidation processes (AOPs) is problematic practical applications because of quick deterioration GDE stability strong oxidants (e.g., hydroxyl radicals) and fouling complex constituents Ca2+ Mg2+). Therefore, this study tested electrosynthesis H2O2 GDEs electrolyte solutions a separate reactor as an alternative for on-site production treatment. Results show many configurations operational parameters electrode distance, current densities, electrolytes, backpressure) intertwine influences on overall performance terms rates efficiencies, stability, operating cost, capital cost. Under optimized conditions determined (4 mm 150–200 mA/cm2 1 M Na2SO4, 30 kPa backpressure), ∼29,000–34,000 mg/L could produced 57.3–68.3 mg/h/cm2 apparent efficiencies 55%–61% during divided cell, maintained stable over ∼350–1000 h before penetrated due electrocapillary effect. The including electricity, water, oxygen consumed process, was ∼1.32–1.48 $/kgH2O2, cost ∼0.30–0.46 $/kgH2O2. results suggest it technoeconomically feasible scale up electrolytes produce site some treatment applications, e.g., micropollutant removal drinking AOPs. Additional are needed further extend lifetime improving fabrications operations prevent penetration electrosynthesis.

Language: Английский

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Bifunctional reality of Gd doping to boost the photocatalytic H2O2 production of Au/BiVO4

Applied Surface Science, Journal Year: 2024, Volume and Issue: 656, P. 159664 - 159664

Published: Feb. 10, 2024

Language: Английский

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