Supercharging the future: MOF-2D MXenes supercapacitors for sustainable energy storage

Journal of Energy Storage, Год журнала: 2024, Номер 80, С. 110303 - 110303

Опубликована: Янв. 6, 2024

Язык: Английский

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

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Март 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.

Язык: Английский

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Enhanced electroproduction of hydrogen peroxide with oxidized boron-doped carbon catalysts synthesized from gaseous CO2

Journal of CO2 Utilization, Год журнала: 2024, Номер 84, С. 102833 - 102833

Опубликована: Июнь 1, 2024

As an eco-friendly alternative to the conventional anthraquinone process, electrochemical production of hydrogen peroxide (H2O2) through oxygen reduction reaction has been attracting attention. The goal this work is derive a carbon-based material from carbon dioxide (CO2) achieve high performance in H2O2 production. Doping heterogeneous element such as on catalyst mainly explored increase selectivity and activity, but little research conducted enhancing catalytic activity with oxidized boron insertion. This study proposes porous materials synthesized CO2 electrocatalysts. Polyethylene oxide (PEO) was thermally treated together boron-oxygen bonding sites. result, having functional groups BC2O BCO2 showed (1.25 mA cm−2) (∼90 %) over wide voltage range two-electron ORR (Oxygen Reduction Reaction) at alkaline media. Furthermore, H-cell where 0.4 V vs. RHE applied, average rate maintained 452.96 mmol g−1 h−1 for four hours faraday efficiency 90 %.

Язык: Английский

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Solid-phase microwave synthesis of high-entropy graphene quantum dots as metal-free electrochemical catalysts

Applied Surface Science, Год журнала: 2023, Номер 648, С. 159061 - 159061

Опубликована: Дек. 3, 2023

Язык: Английский

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Selective two-electron and four-electron oxygen reduction reactions using Co-based electrocatalysts

Chemical Society Reviews, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Recent progress made in Co-based electrocatalysts for selective four-electron (4e − ) and two-electron (2e electrocatalytic oxygen reduction reactions is reviewed.

Язык: Английский

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Metal–Organic-Framework-Derived Nitrogen-Doped Carbon-Matrix-Encapsulating Co0.5Ni0.5 Alloy as a Bifunctional Oxygen Electrocatalyst for Zinc–Air Batteries

Materials, Год журнала: 2024, Номер 17(11), С. 2629 - 2629

Опубликована: Май 29, 2024

The development of low-cost, high-performance oxygen electrocatalysts is great significance for energy conversion and storage. As a potential substitute precious metal electrocatalysts, the construction efficient cost-effective conducive to promoting widespread application zinc-air batteries. Herein, Co

Язык: Английский

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Cobalt–Copper-Embedded Nitrogen-Doped Carbon Nanostructures Derived from Zeolite Imidazolate Frameworks as Electrocatalysts for the Oxygen Reduction Reaction

ACS Omega, Год журнала: 2024, Номер 9(27), С. 29431 - 29441

Опубликована: Июнь 26, 2024

In recent years, researchers have focused on developing zeolite imidazolate frameworks (ZIFs) as an alternative to Pt electrocatalysts for various applications, including water splitting, lithium-air batteries, zinc-air and fuel cells. this study, we synthesized CoCu-ZIF be used a precursor in the development of cathode catalysts oxygen reduction reaction (ORR) Hydrazine played crucial role maintaining uniformity particle size ZIF-67 structures. Moreover, it facilitated rapid formation structures at higher temperatures. A unique pseudorhombic dodecahedral morphology was obtained Co/Cu molar ratio 7:3. Among all N-doped carbon nanostructures embedded with Co Cu nanoparticles, CoCu@NC-750, pyrolyzed 750 °C, showed superior ORR catalytic performance. This catalyst exhibited notably half-wave potential 0.816 V demonstrated clear 4-electron transfer mechanism. The overpotential CoCu@NC-750 shifted by only 11 mV over 10,000 cyclic voltammetry cycles, whereas 55 shift observed Pt/C. ∼0.8% decrease current density during 12-h ORR, contrast 8.3% decline shown activity stability can attributed factors such adsorption induced layer due localized changes electron enhanced bimetallic core. Our findings suggest that is promising Pt/C cell cathodes.

Язык: Английский

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Higher-Valent Nickel Oxides with Enhanced Two-Electron Oxygen Reduction in Advanced Electro-Fenton System for Organic Pollutants Degradation

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124666 - 124666

Опубликована: Окт. 1, 2024

Язык: Английский

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Reconstructed fluorine doped perovskites for electrocatalytic urea production through reaction pathways with CO2 and nitrate ions

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124974 - 124974

Опубликована: Дек. 1, 2024

Язык: Английский

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Optimal MEA structure and operating conditions for fuel cell reactors with hydrogen peroxide and power cogeneration

Journal of Physics Energy, Год журнала: 2023, Номер 6(1), С. 015022 - 015022

Опубликована: Дек. 14, 2023

Abstract The cogeneration of hydrogen peroxide (H 2 O ) and power in proton exchange membrane fuel cell (PEMFC) reactors via two-electron oxygen reduction reaction on the cathode is an economical, low-carbon, green route for on-site production H . However, practice, that cannot be collected timely will accumulate self-decompose catalyst layer (CL), reducing generation efficiency. Thus, accelerating mass transport within CL critical to efficient PEMFC. Herein, we investigated effects electrode assembly (MEA) fabrication process, thickness, carrier water flow rate performance a PEMFC reactor. results show catalyst-coated membrane-type MEA exhibits high output due its lower resistance. formed with dense structure significantly limits collection gas diffusion (GDE)-type macroporous structures CL, facilitating entry drainage. In particular, carbon cloth GDE thin could construct rich macroscopic liquid channels, thus maximizing , but impede performance. These suggest construction well-connected interface between (PEM) establishment pore are keys improve

Язык: Английский

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