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Magnetochemistry
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Study on the Growth and Performance of Materials under Magnetic...
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Study on the Growth and Performance of Materials under Magnetic Field

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

Deadline for manuscript submissions: closed (20 February 2023) | Viewed by 5066

Special Issue Editors

Dr. Lin Hu

E-Mail Website
Guest Editor
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
Prof. Dr. Qianwang Chen

grade E-Mail Website
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)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnetic fields have long been considered significant means to investigate the magnetic properties of materials. With the development of growth and assembly methods, magnetic field, similar to conventional reaction conditions such as temperature, pressure, and surfactant, has been developed as a new parameter for growing and assembling special structures  (mainly through magneto-hydrothermal synthesis, magnetic-field-assisted laser deposition, etc.). Moreover, some advanced experiments have recently revealed fascinating magnetically induced enhancements in photoelectrocatalysis, batteries and so on, which received a great deal of attention due to their efficiency, tunability, and feasibility. Magneto-electrochemistry provides a new, effective, and general strategy to improve the activity of electrode materials and mass transfer, which will be a significant future development direction.

This Special Issue of Magnetochemistry aims to provide a valuable forum for scientists to share their most recent novel findings on the growth and assembly of materials, and on electrode material performance under magnetic fields, as well as their related mechanisms.

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

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  •  magnetic field
  •  magnetic-field-induced synthesis and assembly
  •  magnetohydrodynamics
  •  nucleation and growth
  •  magneto-acceleration of chemical reaction
  •  magnetic alignment of semiconducting polymers
  •  magnetic alignment of carbon-based materials
  •  magneto-electrochemistry
  •  pulsed laser deposition under magnetic field
  •  magnetic nanoparticles
  •  magnetic nanofluids
  •  magnetic ordered materials
  •  magnetic colloidal microstructure
  •  photocatalysis under magnetic field
  •  batteries electrode under magnetic field
  •  electron spin
  •  molecular orbitals

Published Papers (2 papers)

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Research

13 pages, 3049 KiB  
Article
A Strong Magnetic Field Alters the Activity and Selectivity of the CO2RR by Restraining C–C Coupling
by Peichen Wang, Yafei Qu, Xiangfu Meng, Jinwei Tu, Wei Zheng, Lin Hu and Qianwang Chen
Magnetochemistry 2023, 9(3), 65; https://doi.org/10.3390/magnetochemistry9030065 - 26 Feb 2023
Cited by 5 | Viewed by 2187
Abstract
As an external field, a magnetic field can change the electrocatalytic activity of catalysts through various effects. Among them, electron spin polarization on the catalyst surface has attracted much attention. Herein, we investigate the sensitive response behavior of a Cu2O nanocubes [...] Read more.
As an external field, a magnetic field can change the electrocatalytic activity of catalysts through various effects. Among them, electron spin polarization on the catalyst surface has attracted much attention. Herein, we investigate the sensitive response behavior of a Cu2O nanocubes to an in situ magnetic field. Under a 3 T strong magnetic field, the total transferred electron quantity in IT test (−1.1 VRHE) and the current density in the polarization curve increase by 28.7% and 54.7%, respectively, while the onset potential decreases significantly by 114 mV. Moreover, it was found that product selectivity was also altered by the magnetic field. The Faraday efficiency of C1 increases substantially, along with the inhibition of C2+ reaction paths and the HER. Our experimental results and DFT calculation demonstrate that a hybrid magnetic effect accelerates the CO2RR kinetic and generates spin polarization of the catalyst surface. The polarized surface changes the binding energy of *OCHO/*COOH and inhibits singlet C–C coupling, which restrains the C2+ reduction path and thus more CO2 is reduced to HCOOH. Full article
(This article belongs to the Special Issue Study on the Growth and Performance of Materials under Magnetic Field)
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11 pages, 2051 KiB  
Article
Control of Molecular Orientation and Carrier Transport of Thiophene-Based Semiconducting Polymer via Superparamagnetic Nanoparticles Fe3O4@C-Assisted Magnetic Alignment Method
by Di Hui, Tian Li, Chun Ye and Guoxing Pan
Magnetochemistry 2022, 8(6), 64; https://doi.org/10.3390/magnetochemistry8060064 - 10 Jun 2022
Viewed by 2232
Abstract
Realizing the high molecular orientation and structurally ordered microstructure of organic semiconductor polymer thin films is beneficial for enhancing the charge transport of conjugated polymers and achieving high-performance organic electronic devices. In this work, we successfully developed large-area highly aligned films of a [...] Read more.
Realizing the high molecular orientation and structurally ordered microstructure of organic semiconductor polymer thin films is beneficial for enhancing the charge transport of conjugated polymers and achieving high-performance organic electronic devices. In this work, we successfully developed large-area highly aligned films of a thiophene-based polymer, namely poly(2,5-bis(3-alkylthiophen-2-yl) thieno [3,2-b] thiophene) (PBTTT), using the magnetic alignment method at a low magnetic field (0.12 T), which was assisted by superparamagnetic nanoparticles Fe3O4@C. The aligned microstructure of the composite films is confirmed by systematic analysis that includes polarized optical microscopy, polarized UV–visible absorption spectroscopy, and an atomic force microscope. Organic field effect transistors based on magnetic aligned composite film exhibit a 2.8-fold improvement in carrier mobility compared with the unaligned films. We hold a formation mechanism that the rapid magnetically induced self-assembly property of Fe3O4@C and its intermolecular interaction with polymer chains are key to the new method of preparing oriented thin films. Full article
(This article belongs to the Special Issue Study on the Growth and Performance of Materials under Magnetic Field)
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