Recent Progress of Magnetic Field Effect on Catalysts

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Field".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 1630

Special Issue Editors


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Guest Editor
Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China
Interests: material preparation and applications under special conditions, such as magnetic fields (magnetically responsive photonic crystals, magnetic nanoparticle biomedical applications, and nanocatalysis)
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High Magnetic Field Laboratory of Chinese Academy of Sciences, Hefei Institute of Physical Science, Hefei 230031, China
Interests: magnetic-field-induced growth; magneto-electrochemistry; design of magnetic field growth devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Developing new strategies to advance the performance of catalysts is crucial to mitigating multiple contemporary technological challenges. In recent years, research on the intersection of magnetic fields and catalysis has attracted increasing attention, and magnetic field-enhanced catalysis has been employed as a frontier and novel strategy to further improve conventional catalysts' activity, selectivity, and overall efficiency. The unique magnetic field effects in the catalytic process, including the magnetothermal effect, magnetohydrodynamic effect, Lorentz forces, Kelvin forces, Maxwell tension, and spin polarization, can accelerate the reaction rate, relieve the adhesion of bubbles on the electrode, promote the mass transfer, and change the reaction pathway. This results in significantly increased catalytic activities in the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), the CO2 reduction reaction, etc. On the other hand, when a magnetic field is employed in a catalyst synthesis system, the specific structures, such as the morphology, exposed crystal plane, surface electronic structure modulation, and electron spin state, will be adjusted, which can also promote the improvement of catalytic performance. Although considerable progress has been achieved in magnetic field-mediated strategy, there is still much space for future combinations of catalysts with magnetic fields.

This Special Issue of Magnetochemistry aims to publish a collection of research contributions illustrating the recent progress in all aspects of the magnetic field-mediated strategy on catalysts' performance in the topics listed below.

Prof. Dr. Qianwang Chen
Dr. Lin Hu
Guest Editors

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Keywords

  • magnetic field-induced catalyst synthesis

  • magnetic field-enhanced electrocatalytic performance
  • magnetic field-enhanced photocatalytic performance
  • the mechanism of the magnetic field effect
  • in situ characterization under magnetic field
  • catalytic device under magnetic field
  • magnetic catalyst
  • magnetothermal effect
  • magnetohydrodynamic effect

Published Papers (2 papers)

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Research

12 pages, 3422 KiB  
Article
Tuning Structure and Properties of a Ferromagnetic Organic Semiconductor via a Magnetic Field-Modified Reduction Process
by Han Zhou, Zaitian Cheng, Zhiqiang Ai, Xinyao Li, Lin Hu and Fapei Zhang
Magnetochemistry 2024, 10(5), 34; https://doi.org/10.3390/magnetochemistry10050034 - 15 May 2024
Viewed by 575
Abstract
The development of novel synthesis and assembly strategies is critical to achieving a ferromagnetic organic semiconductor with high Curie temperature. In this study, we report a high magnetic field (HMF)-modified solvothermal approach for the reduction in neutral perylene diimide (PDI) into the dianion [...] Read more.
The development of novel synthesis and assembly strategies is critical to achieving a ferromagnetic organic semiconductor with high Curie temperature. In this study, we report a high magnetic field (HMF)-modified solvothermal approach for the reduction in neutral perylene diimide (PDI) into the dianion species to prepare the PDI magnets comprising radical anions after subsequent oxidation processes. The PDI materials, assembled from the dianion solution by an HMF-modified reduction, exhibit a smaller crystallite size and an enlarged distance of the π-π stacking in the PDI aggregates. Furthermore, the PDI magnets obtained from the process under a 9T field reveal weakened ferromagnetism and the rapid degradation of electrical conductivity compared to those prepared without a magnetic field. Based on spectral and structural characterizations, such performance deterioration originates from the enhanced instability of the radical anions exposed to air, as well as the decreased crystallinity for the radical PDIs synthesized from the HMF-modified reduction process. This work demonstrates that magnetic fields offer an effective way in the material synthesis process to manipulate the structure and magnetic properties of the radical-based organic magnets. Full article
(This article belongs to the Special Issue Recent Progress of Magnetic Field Effect on Catalysts)
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14 pages, 4900 KiB  
Article
Preparation of Magnetic Nano-Catalyst Containing Schiff Base Unit and Its Application in the Chemical Fixation of CO2 into Cyclic Carbonates
by Na Kang, Yindi Fan, Dan Li, Xiaoli Jia and Sanhu Zhao
Magnetochemistry 2024, 10(5), 33; https://doi.org/10.3390/magnetochemistry10050033 - 26 Apr 2024
Viewed by 818
Abstract
The development of a catalyst for the conversion of CO2 and epoxides to the corresponding cyclic carbonates is still a very attractive topic. Magnetic nano-catalysts are widely used in various organic reactions due to their magnetic separation and recycling properties. Here, a [...] Read more.
The development of a catalyst for the conversion of CO2 and epoxides to the corresponding cyclic carbonates is still a very attractive topic. Magnetic nano-catalysts are widely used in various organic reactions due to their magnetic separation and recycling properties. Here, a magnetic nano-catalyst containing a Schiff base unit was designed, synthesized and used as a heterogeneous catalyst to catalyze CO2 and epoxides to form cyclic carbonates without solvents and co-catalysts. The catalyst was characterized using Fourier transform infrared (FTIR), X-ray diffraction (XRD), thermogravimetric (TG), VSM, SEM, TEM and BET. The results show that the magnetic nano-catalyst containing the Schiff base unit has a high activity in the solvent-free cycloaddition reaction of CO2 with epoxide under mild conditions, and is easily separated from the reaction mixture driven by external magnetic force. The recovered catalyst maintains a high performance after five cycles. Full article
(This article belongs to the Special Issue Recent Progress of Magnetic Field Effect on Catalysts)
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