Recent Advances of Magnetite (Fe3O4)-Based Magnetic Materials in Catalytic Applications

Magnetochemistry, Journal Year: 2023, Volume and Issue: 9(4), P. 110 - 110

Published: April 20, 2023

Catalysts play a critical role in producing most industrial chemicals and are essential to environmental remediation. Under the demands of sustainable development, environment protection, cost-related factors, it has been suggested that catalysts sufficiently separable conveniently recyclable catalysis process. Magnetite (Fe3O4) nanomaterials provide possible way achieve this goal, due their magnetism, chemical stability, low toxicity, economic viability, etc. Therefore, Fe3O4-based materials emerging as an important solid support load heterogeneous immobilize homogeneous catalysts. Moreover, addition magnetic character will not only make recovery much easier but also possibly endow with desirable properties, such magnetothermal conversion, Lewis acid, mimetic enzyme activity, Fenton activity. The following review comprises short survey recent reports catalytic applications materials. It contains seven sections, introduction into theme, remediation, electrocatalysis, organic synthesis, synthesis biodiesel, cancer treatment, conclusions about reported research perspectives for future developments. Elucidation functions mechanisms Fe3O4 nanoparticles (NPs) these may benefit acquisition robust affordable protocols, leading good activity enhanced recoverability.

Language: Английский

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Coupling NiSe₂ Nanoparticles with N-Doped Porous Carbon Enables Efficient and Durable Electrocatalytic Hydrogen Evolution Reaction at pH Values Ranging from 0 to 14

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 7(1), P. 1138 - 1145

Published: Dec. 20, 2023

Integrating metal-based species with a carbon matrix is promising approach for fabricating inexpensive, durable, and efficient electrocatalysts. Herein, NiSe2-decorated N-doped polyhedra (NC) are prepared as electrocatalysts hydrogen evolution reaction (HER) by template-assisted approach. The optimal NC-NiSe2 delivers extraordinary catalytic activities toward HER in wide pH range, overpotentials of 127 mV 0.5 M H2SO4, 226 1 PBS, 205 KOH to drive current density 10 mA cm–2. In addition, this catalyst undergoes fast kinetics via Volmer–Heyrovsky mechanism exhibits excelent long-term durability 48 h the full media. During electrocatalysis, when electrons pass through NC surface NiSe2 particles, water molecules at active sites reduced, then released. excellent activity mainly benefit from hierarchically porous architecture well synergistic interaction nanoparticles matrix, which not only significantly boost electronic conductivity generate plentiful but also guarantee chemical structural stabilities species. This work unravels deep insights into exploration carbon-supported metal chalcogenides highly full-pH values.

Language: Английский

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Mo-doped Ni3S4 nanosheets grown on carbonized wood as highly efficient and durable electrocatalysts for water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 339, P. 123123 - 123123

Published: July 20, 2023

Language: Английский

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Nanomagnetic tetraaza (N₄ donor) macrocyclic Schiff base complex of copper(ii): synthesis, characterizations, and its catalytic application in Click reactions

Nanoscale Advances, Journal Year: 2023, Volume and Issue: 5(23), P. 6594 - 6605

Published: Jan. 1, 2023

In this research, a novel nanomagnetic tetra-azamacrocyclic Schiff base complex of copper(ii) was produced via post-synthetic surface modification an Fe3O4 by silane-coupling agent that contains acetylacetone functionalities at the end its chain. Moreover, target Cu involves tetradentate ligand obtained from template reaction with o-phenylenediamine and Cu(NO3)2·3H2O. Furthermore, prepared nominated as [Fe3O4@TAM-Schiff-base-Cu(II)]. The Fourier-transform infrared (FT-IR) analysis indicates presence Schiff-base-Cu in catalyst. X-ray spectroscopy (EDS) TGA reveal approximately 6-7% catalyst comprises hydrocarbon moieties. scanning electron microscope (SEM) transmission microscopy (TEM) images demonstrate uniformly shaped particles, nearly spherical nature, sizes ranging 9 to 18 nm. [Fe3O4@TAM-Schiff-base-Cu(II)] applied for click synthesis diverse range 5-substituted-1H-tetrazoles PEG-400 green medium. Regarding electrical properties Cu(ii) complex, tetra-aza (N4 donor) macrocyclic N-rich reasonable - leading excellent capacity catalyze these organic transformations. Finally, high magnetization value (44.92 emu g-1) enables recycling least four times without compromising catalytic efficiency.

Language: Английский

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Spatially Separated Cu/Ru on Ordered Mesoporous Carbon for Superior Ammonia Electrosynthesis from Nitrate over a Wide Potential Window

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(36), P. 24966 - 24977

Published: Aug. 28, 2024

Nitrate (NO3–) in wastewater poses a serious threat to human health and the ecological environment. The electrocatalytic NO3– reduction ammonia (NH3) reaction (NO3–RR) emerges as promising carbon-free energy route for enabling removal sustainable NH3 synthesis. However, it remains challenge achieve high Faraday efficiencies at wide potential window due complex multiple-electron process. Herein, spatially separated dual-metal tandem electrocatalysts made of nitrogen-doped ordered mesoporous carbon support with ultrasmall high-content Cu nanoparticles encapsulated inside large low-content Ru dispersed on external surface (denoted Ru/Cu@NOMC) are designed. In NO3–RR, sites can quickly convert adsorbed NO2– (*NO2–), while efficiently produce active hydrogen (*H) enhance kinetics converting *NO2– sites. Due synergistic effect between sites, Ru/Cu@NOMC exhibits maximum Faradaic efficiency (FENH3) approximately 100% −0.1 V vs reversible electrode (RHE) yield rate 1267 mmol gcat–1 h–1 −0.5 RHE. Finite element method (FEM) simulation electrochemical situ Raman spectroscopy revealed that framework intermediate concentration confinement effect. Thanks Cu–Ru mesopore effect, 500 mV FENH3 over 90% superior stability production 156 h be achieved catalyst.

Language: Английский

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State-of-the-art advancements in metal−organic framework nanoarchitectures for catalytic applications

Applied Materials Today, Journal Year: 2024, Volume and Issue: 38, P. 102224 - 102224

Published: May 5, 2024

Language: Английский

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Insights into direct/synergetic processes for high-efficiency steam reforming of methanol over Pt-In2O3/CeO2 catalysts: The effect of support structural properties

Fuel, Journal Year: 2024, Volume and Issue: 362, P. 130760 - 130760

Published: Jan. 6, 2024

Language: Английский

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Enhanced performance of hydrothermally synthesized zinc vanadium oxide nanoparticles for supercapacitor and photocatalytic applications

Journal of the Indian Chemical Society, Journal Year: 2024, Volume and Issue: 101(10), P. 101247 - 101247

Published: July 9, 2024

Language: Английский

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Strong Interaction between Molybdenum Compounds and Mesoporous CMK‐5 Supports Boosts Hydrogen Evolution Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: July 16, 2024

Abstract Strong metal‐support interaction (SMSI) between transition metal nanoparticles and carbon matrix offers significant structure advantages due to the ability modulate electronic of nanoparticles, increase density active sites, improve conductivity catalysts. Here, ultrafine metallic molybdenum compounds (MoP, Mo 2 C, MoS ) strongly coupled with mesoporous CMK‐5 are synthesized. The confinement growth in pores produces encapsulated affording facilitated electron transfer, enhancing HER activity induced by SMSI effect. hierarchical nanostructure strong interactions substrate molybdenum‐based allow efficient mass/electron transport improving catalytic hydrogen evolution reaction (HER) activity. effective exchange species support is studied X‐ray photoelectron spectroscopy (XPS) measurement, confirming presence resulting MoP/CMK‐5 catalyst exhibits outstanding performance alkaline (65 mV@10 mA cm −2 ), acidic (123 simulated seawater electrolytes (103 making it one most promising catalysts reported for HER. This work provides guidance on designing high‐performance electrocatalysts enhancement electrochemical reaction.

Language: Английский

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In situ growth of Ni/Ni3S2–MoO2 nanocrystals on carbon cloth for the enhanced electrocatalytic oxidation of methanol

Applied Surface Science, Journal Year: 2023, Volume and Issue: 640, P. 158348 - 158348

Published: Sept. 1, 2023

Language: Английский

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