Yolk-shell electron-rich Ru@hollow pyridinic-N-doped carbon nanospheres with tunable shell thickness and ultrahigh surface area for biomass-derived levulinic acid hydrogenation under mild conditions

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 355, С. 124193 - 124193

Опубликована: Май 12, 2024

Язык: Английский

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Advances in Stability of NiFe‐Based Anodes toward Oxygen Evolution Reaction for Alkaline Water Electrolysis

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 23, 2024

Abstract Alkaline electrolysis plays a crucial role in sustainable energy solutions by utilizing electrolytic cells to produce hydrogen gas, providing clean and efficient method for storage conversion. Efficient, stable, low‐cost electrocatalysts the oxygen evolution reaction (OER) are essential facilitate alkaline water on commercial scale. Nickel‐iron‐based (NiFe‐based) transition metal considered most promising non‐precious catalysts OER due their low cost, abundance, tunable catalytic properties. Nevertheless, majority of existing NiFe‐based suffer from limited activity poor stability, posing significant challenge meeting industrial applications. This also highlights common situation where emphasis material receives attention, while equally critical stability aspect is often underemphasized. Initiating with comprehensive exploration materials, this article first summarizes debate surrounding determination active sites electrocatalysts. Subsequently, degradation mechanisms recently reported outlined, encompassing assessments both chemical mechanical endurance, along approaches enhancing stability. Finally, suggestions put forth regarding considerations design electrocatalysts, focus heightened

Язык: Английский

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Fabricating Multivariate Metal–Organic Frameworks by Metal Site Reduction as Green Catalyst for CO₂ Conversion

ACS Sustainable Chemistry & Engineering, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Язык: Английский

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Magnetic Hollowed CoFe Alloy@C Prism Catalyst for N-Alkylation of Alcohols and Amines

Inorganic Chemistry, Год журнала: 2025, Номер 64(10), С. 4784 - 4790

Опубликована: Март 5, 2025

A novel magnetic hollowed CoFe@C-650 prism catalyst has been successfully prepared and applied in the N-alkylation of alcohols amines through a hydrogen borrowing strategy. The demonstrates good to excellent activities reaction with broad substrate scope afford up 99% yield target products. preliminary mechanistic study reveals that high valent Co species may promote adsorption conversion alcohols, while Fe assists hydrogenating imine intermediates.

Язык: Английский

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Development of new supported catalysts for the continuous alkylation of amines with alcohols

Fine Chemical Technologies, Год журнала: 2025, Номер 20(1), С. 18 - 26

Опубликована: Март 5, 2025

Objectives. The work set out to develop catalysts based on nickel and copper obtained by active phase chemical reduction investigate their activity including the influence of type supports course alkylation amines with primary or secondary alcohols in a plug-flow reactor fixed catalyst bed. Methods. reactions were carried continuous mode bed an appropriate plug flow microcatalytic apparatus at 160–240°C. NaX zeolite, magnesium oxide, γ-Al 2 O 3 used as supports. After preparing impregnation from excess solution metal salts, was reduced sodium tetrahydridoborate aqueous solution. composition resulting products analyzed gas–liquid chromatography, while structure confirmed gas chromatography-mass spectrometry. alkylating agents ethanol, 2-propanol, 1-butanol, 1-pentanol, benzyl alcohol, 1-octanol; alkylated 1-butylamine, 1-hexylamine, 1-octylamine, aniline, morpholine, piperidine, hexamethyleneimine. Results. catalyzed (nickel copper) nanoparticles supported oxide MgO, atmospheric hydrogen pressure 160–240°C leads formation predominantly mono- N -alkylated yields up 99%. Conclusions. Nickel (or various are effective for synthesis tertiary reactor.

Язык: Английский

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Electrochemical Synthesis of Metasequoia‐Like Reduced Graphene Oxide Coated Cobalt‐Silver Catalyst for Stable and Efficient Electrocatalytic Nitrate Reduction to Ammonia

Small, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 5, 2024

Abstract Electrocatalytic nitrate (NO 3 − ) reduction to ammonia (NH is a green and efficient NH synthesis technology. Metallic silver (Ag) one of the well‐known electrocatalysts for NO reduction. However, under alkaline conditions, its poor water‐splitting ability fails provide sufficient protonic hydrogen required synthesis, resulting in low selectivity. Additionally, metal catalysts are prone leaching oxidation during electrocatalysis, stability. Herein, cobalt (Co) into Ag (CoAg) catalyst doped, which not only increases selectivity by 34.4%, but also reduces potential 0.1 V. Meanwhile, reduced graphene oxide (rGO) as protective “armor” used encapsulate CoAg (rGO 2.92 @CoAg). The rGO @CoAg shows excellent stability over 300 hours (h) continuous reaction. Co contents after tests decreases 4.3% 3.1%, respectively, much lower than those without (90.8%, 52.6%). Moreover, high Faradaic efficiency (99.3%) yield rate (1.47 mmol h −1 cm −2 ). Therefore, performance strong obtained doping coating, provides theoretical basis practical industrial application.

Язык: Английский

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Application of mechanical separation method with filtration for nanodispersed FeNi powders with carbon coating

Fullerenes Nanotubes and Carbon Nanostructures, Год журнала: 2024, Номер unknown, С. 1 - 6

Опубликована: Сен. 15, 2024

Язык: Английский

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Fe-promoted Ni catalyst supported on KCC-1 for enhancing synthetic natural gas (SNG) production

Fuel, Год журнала: 2024, Номер 385, С. 134193 - 134193

Опубликована: Дек. 27, 2024

Язык: Английский

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