Green Synthesis of Nitrogen-Doped Graphene Quantum Dots by Recycling Waste Graphite and Impact of Oxygen Adsorption on Enhancing Photoluminescence

Surfaces and Interfaces, Год журнала: 2025, Номер unknown, С. 106342 - 106342

Опубликована: Март 1, 2025

Язык: Английский

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Functional Group Engineering of Single‐Walled Carbon Nanotubes for Anchoring Copper Nanoparticles Toward Selective CO₂ Electroreduction to C₂ Products

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Abstract Electroreduction of carbon dioxide (CO 2 ) is a key strategy for achieving net‐zero emissions. Copper (Cu)‐based electrocatalysts have shown promise CO conversion into valuable chemicals but are hindered by limited C 2+ product selectivity due to competing hydrogen evolution and ineffective dimerization adsorbed intermediate ( * CO). Here, functional‐group‐directed reported enhance using single‐walled nanotubes (SWCNTs) as supports. The catalytic performance Cu nanoparticles strongly influenced the type density functional groups on SWCNTs. Optimized Cu/amine‐functionalized SWCNTs achieved Faradaic efficiency 66.2% partial current −270 mA cm −2 products within flow cell, outperforming Cu/SWCNTs Cu/cyano‐functionalized Density theory calculations revealed that electron‐donating amine can facilitate electron transfer from graphite sheet atoms, thereby shifting d‐band center upward. This shift enhances its hydrogenation derivative adsorption promotes water splitting, leading an increased tendency generation products. In situ infrared Raman spectroscopy confirm enhancement CHO coverage, facilitating C─C coupling. work provides molecular framework exploring interactions between active metals in electrolysis, offering insights designing catalysts broad range electrocatalytic processes.

Язык: Английский

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Rationally Designing Efficient Biomass Carbon Electrocatalysts for H₂O₂ Synthesis and Near-Neutral Zn–Air Batteries with Preliminary Machine Learning Guidance

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Biomass-based carbon materials are considered promising metal-free catalysts for the 2e- oxygen reduction reaction (ORR) to synthesize H2O2 and act as air electrodes in Zn-air batteries. However, optimization of catalyst structure is a complex process due diversity biomass precursors synthesis parameters. Machine learning, new artificial intelligence technology, has recently been used various fields owing its ability rapidly analyze large amounts data guide material synthesis. Consequently, we constructed machine learning model based on previously reported experimental guided fabrication boron-doped ORR. The achieved catalytic performance exceeded most ORR terms selectivity (90-95% broad potentials 0.30-0.68 V vs reversible hydrogen electrode), stability (maintaining over 90% 12 h), yield (3450 mmol gcatalyst-1 h-1), Faraday efficiency (over 90%). We applied batteries showed high capacity (2856 mAh g-1) twice that traditional commercial metal catalysts. Therefore, this study proposed an effective biomass-based field electrocatalysis.

Язык: Английский

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Highly selective electrosynthesis of hydrogen peroxide with tellurium nanoparticles encapsulated in ultrathin graphitic carbon shells

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162752 - 162752

Опубликована: Апрель 1, 2025

Язык: Английский

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Boosting photogenerated charge accumulation of oxidated carbon nitride nanotubes for efficient CO2 photoreduction

Science China Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 14, 2025

Язык: Английский

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Dual-ligand engineered CoNi alloy/N-doped carbon nanotubes bifunctional ORR/OER electrocatalyst for long-lifespan rechargeable Zn-air batteries

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 683, С. 631 - 640

Опубликована: Дек. 7, 2024

Язык: Английский

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A novel ratiometric electrochemical aptasensor based on graphene quantum dots/Cu-MOF nanocomposite for the on-site determination of Staphylococcus aureus

Journal of Hazardous Materials, Год журнала: 2024, Номер 485, С. 136845 - 136845

Опубликована: Дек. 13, 2024

Язык: Английский

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Harnessing graphene quantum dots for the selective and sensitive detection of dye contaminants

Diamond and Related Materials, Год журнала: 2024, Номер unknown, С. 111914 - 111914

Опубликована: Дек. 1, 2024

Язык: Английский

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