Nitrogen doped three-dimensionally interconnected macroporous/mesoporous carbon nanofibers as free-standing electrode for room temperature sodium sulfur batteries

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: 152, P. 111997 - 111997

Published: Jan. 17, 2025

Language: Английский

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Separator decoration with nitrogen-doped porous carbon derived from resin for highly efficient polysulfides confinement in lithium sulfur batteries

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 112, P. 115566 - 115566

Published: Jan. 28, 2025

Language: Английский

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Carbon Surface Chemistry: Benchmark for the Analysis of Oxygen Functionalities on Carbon Materials

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

The explicit roles of the hardly avoidable oxygen species on carbon materials in various fields remain contentious due to limitations characterization techniques, which lead a lack fundamental understanding surface chemistry. This study delves exhaustively into comprehension features different oxygen-modified carbons through dynamic evolution surficial functional groups. Significant differences thermal stability and electronic properties among are elucidated via situ characterizations theoretical calculations, providing reliable benchmark for identifying groups materials. chemical simultaneously investigated show influence structures, redox stability, scalable metal adsorption. These findings not only consider common misconception that produced under conditions possess identical but also raise awareness chemistry atomic level.

Language: Английский

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Electrocatalyst for the oxygen reduction reaction (ORR): towards an active and stable electrocatalyst for low-temperature PEM fuel cell

Ionics, Journal Year: 2024, Volume and Issue: 30(11), P. 6757 - 6787

Published: Aug. 17, 2024

Language: Английский

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Electrocatalytic and Photocatalytic N2 Fixation Using Carbon Catalysts

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(1), P. 65 - 65

Published: Jan. 2, 2025

Carbon catalysts have shown promise as an alternative to the currently available energy-intensive approaches for nitrogen fixation (NF) urea, NH3, or related nitrogenous compounds. The primary challenges NF are natural inertia of molecules and competitive hydrogen evolution reaction (HER). Recently, carbon-based materials made significant progress due their tunable electronic structure ease defect formation. These properties significantly enhance electrocatalytic photocatalytic reduction (NRR) activity. While transition metal-based solved kinetic constraints activate bonds via donation-back-π approach, there is a problem: d-orbital electrons these metal atoms tend generate H-metal bonds, inadvertently amplifying unwanted HER. Because this, timely review defective electrocatalysts imperative. Such will succinctly capture recent developments in both experimental theoretical fields. It delve into multiple engineering advance development ideal photocatalysts. Furthermore, this carefully explore correlation between photocatalysts Finally, novel introduced obtain more efficient performance NF, paving way sustainable future.

Language: Английский

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Enhanced Fe^IV═O Generation via Peroxymonosulfate Activation by an Edge‐Site Engineered Single‐Atom Iron Catalyst

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

Published: Jan. 19, 2025

Abstract As an oxidant, the ferryl‐oxo complex (Fe IV ═O) offers excellent reactivity and selectivity for degrading recalcitrant organic contaminants. However, enhancing Fe ═O generation on heterogeneous surfaces remains challenging because underlying formation mechanism is poorly understood. This study introduces edge defects onto a single‐atom catalyst (FeNC‐edge) to promote via peroxymonosulfate (PMS) activation. In presence of PMS, FeNC‐edge at low dose (20 mg L −1 , equivalent 0.14 Fe) exhibits unprecedented activity contaminant degradation. Electrochemical analysis, in situ Raman spectroscopy, probe experiments confirm that enhanced surface FeNC‐edge. Density functional theory calculations reveal introduced sites concentrate electron density active atoms, facilitating charge transfer from PMS. Notably, immobilized polymeric membrane functioned as continuous‐flow oxidation system with efficient recycling minimal leaching.

Language: Английский

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Cation‐Vacancy Engineering in Cobalt Selenide Boosts Electrocatalytic Upcycling of Polyester Thermoplastics at Industrial‐Level Current Density

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 26, 2025

Abstract The past decades have witnessed the increasing accumulation of plastics, posing a daunting environmental crisis. Among various solutions, converting plastics into value‐added products presents significant endeavor. Here, an electrocatalytic upcycling route that efficiently converts waste poly(butylene terephthalate) high‐value succinic acid with high Faradaic efficiency 94.0% over cation vacancies‐rich cobalt selenide catalyst is reported, showcasing unprecedented activity (1.477 V vs. RHE) to achieve industrial‐level current density 1.5 A cm −2 , and featuring robust operating durability (≈170 h). In particular, when combining butane‐1,4‐diol monomer oxidation (BOR) hydrogen evolution using vacancy‐engineered as bifunctional catalyst, relatively low cell voltage 1.681 required reach 400 mA manifesting energy‐saving ≈15% compared pure water splitting. mechanism reaction pathways BOR are first revealed through theoretical calculations in‐situ spectroscopic investigations. generality this evidenced by its powerful other polyester thermoplastics such succinate) poly(ethylene terephthalate). These strategies can be coupled reduction small molecules (e.g., H 2 O, CO NO 3 − ), shedding light on production chemicals.

Language: Английский

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Ultrathin porous nitrogen-doped carbon nanosheets with rich defects for efficient Cr(VI) reduction

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125174 - 125174

Published: Feb. 1, 2025

Language: Английский

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Evaluation of Structure-Activity Relationship for Nitrogen-Doped Carbon-Based Metal-Free Electrocatalysts using Electrochemiluminescence

Talanta, Journal Year: 2025, Volume and Issue: 291, P. 127861 - 127861

Published: March 1, 2025

Language: Английский

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Multifunctional Carbon‐Based Metal‐Free Catalysts for Cascade Electrochemical‐Chemical Coupling Catalyses

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Abstract Cascade electrochemical‐chemical coupling (CECC) involves sequential electrochemical and chemical reactions, using intermediates from processes as reactants for subsequent transformations to enhance the efficiency selectivity sustainable syntheses of complex chemicals. Despite its economic environmental benefits, CECC still faces multiple challenges, including a low utilization intermediate reactants, competitive side difficulties in design scale‐up catalysts, leading yield. To ensure economically viable CECC, it is imperative rationally develop cost‐efficient high‐performance such carbon‐based metal‐free electrocatalysts (C‐MFECs) certain carbon‐supported transition metal with high activity atomic precision desirable products. In this review, an overview recent advancements doping C‐MFECs provided enhancing their catalytic toward CECC. Three major systems based on are discussed; they hydrogen peroxide coupling, carbon dioxide upgrading, redox‐mediated systems. Current challenges future perspectives emerging field also addressed.

Language: Английский

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