Advances in Nanostructured Electrode Materials: Design and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: 10 July 2024 | Viewed by 910

Special Issue Editor


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Guest Editor
Department of Civil, Energy, Environmental and Materials Engineering, Università degli Studi Mediterranea di Reggio Calabria, Reggio Calabria, Italy
Interests: nanocomposites; nanoparticles; graphene oxide; graphene-based materials; synthesis; structural characterization; green chemistry; heterogeneous catalysis; selective hydrogenation; environmental catalysis
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Special Issue Information

Dear Colleagues,

The development of novel nanostructured materials is a cornerstone of emerging electrochemical technologies that provide clean and environmentally friendly solutions to meet end user requirements. Nanocomposites play a key role in the adoption of such technologies due to their unique and sometimes enhanced properties and because of the possibility of suitably tuning their structural and functional properties. Furthermore, nanostructured electrode materials are key in terms of significantly advancing the performance, efficiency, and safety technology. This Special Issue aims to depict the state-of-the-art design, synthesis and characterization of various nanostructured electrode materials, as well as their electrochemical applications in the fields of electrocatalysis, energy conversion, energy storage, and environmental protection.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but not limited to) the following:

  • Design and synthesis of nanostructured materials.
  • Functional nanomaterials.
  • Development of the different classes of multicomponent materials.
  • Nanoalloy.
  • Advanced characterization for understanding the electrochemical behavior and structure-property relationships of electrode materials.
  • Applications of nanostructured materials, including energy storage and conversion devices, electrocatalysis, water-splitting process for hydrogen production, photocatalysis, removal of pollutants.

We look forward to receiving your contributions.

Dr. Maria Grazia Musolino
Guest Editor

Manuscript Submission Information

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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. Nanomaterials is an international peer-reviewed open access semimonthly 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 2900 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

  • nanostructured materials
  • nanomaterials
  • nanocomposites
  • electrode materials
  • synthesis
  • characterization
  • functional materials
  • cathode
  • anode
  • applications

Published Papers (2 papers)

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Research

12 pages, 6788 KiB  
Article
Uniaxial Magnetization and Electrocatalytic Performance for Hydrogen Evolution on Electrodeposited Ni Nanowire Array Electrodes with Ultra-High Aspect Ratio
by Yumu Sako, Ryusei Saeki, Masamitsu Hayashida and Takeshi Ohgai
Nanomaterials 2024, 14(9), 755; https://doi.org/10.3390/nano14090755 - 25 Apr 2024
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Abstract
Ni nanowire array electrodes with an extremely large surface area were made through an electrochemical reduction process utilizing an anodized alumina template with a pore length of 320 µm, pore diameter of 100 nm, and pore aspect ratio of 3200. The electrodeposited Ni [...] Read more.
Ni nanowire array electrodes with an extremely large surface area were made through an electrochemical reduction process utilizing an anodized alumina template with a pore length of 320 µm, pore diameter of 100 nm, and pore aspect ratio of 3200. The electrodeposited Ni nanowire arrays were preferentially oriented in the (111) plane regardless of the deposition potential and exhibited uniaxial magnetic anisotropy with easy magnetization in the axial direction. With respect to the magnetic properties, the squareness and coercivity of the electrodeposited Ni nanowire arrays improved up to 0.8 and 550 Oe, respectively. It was also confirmed that the magnetization reversal was suppressed by increasing the aspect ratio and the hard magnetic performance was improved. The electrocatalytic performance for hydrogen evolution on the electrodeposited Ni nanowire arrays was also investigated and the hydrogen overvoltage was reduced down to ~0.1 V, which was almost 0.2 V lower than that on the electrodeposited Ni films. Additionally, the current density for hydrogen evolution at −1.0 V and −1.5 V vs. Ag/AgCl increased up to approximately −580 A/m2 and −891 A/m2, respectively, due to the extremely large surface area of the electrodeposited Ni nanowire arrays. Full article
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11 pages, 4865 KiB  
Article
Ultra-Low Thermal Conductivity and Improved Thermoelectric Performance in Tungsten-Doped GeTe
by Zhengtang Cai, Kaipeng Zheng, Chun Ma, Yu Fang, Yuyang Ma, Qinglin Deng and Han Li
Nanomaterials 2024, 14(8), 722; https://doi.org/10.3390/nano14080722 - 20 Apr 2024
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Abstract
Compared to SnTe and PbTe base materials, the GeTe matrix exhibits a relatively high Seebeck coefficient and power factor but has garnered significant attention due to its poor thermal transport performance and environmental characteristics. As a typical p-type IV–VI group thermoelectric material, W-doped [...] Read more.
Compared to SnTe and PbTe base materials, the GeTe matrix exhibits a relatively high Seebeck coefficient and power factor but has garnered significant attention due to its poor thermal transport performance and environmental characteristics. As a typical p-type IV–VI group thermoelectric material, W-doped GeTe material can bring additional enhancement to thermoelectric performance. In this study, the introduction of W, Ge1−xWxTe (x = 0, 0.002, 0.005, 0.007, 0.01, 0.03) resulted in the presence of high-valence state atoms, providing additional charge carriers, thereby elevating the material’s power factor to a maximum PFpeak of approximately 43 μW cm−1 K−2, while slightly optimizing the Seebeck coefficient of the solid solution. Moreover, W doping can induce defects and promote slight rhombohedral distortion in the crystal structure of GeTe, further reducing the lattice thermal conductivity κlat to as low as approximately 0.14 W m−1 K−1 (x = 0.002 at 673 K), optimizing it to approximately 85% compared to the GeTe matrix. This led to the formation of a p-type multicomponent composite thermoelectric material with ultra-low thermal conductivity. Ultimately, W doping achieves the comprehensive enhancement of the thermoelectric performance of GeTe base materials, with the peak ZT value of sample Ge0.995W0.005Te reaching approximately 0.99 at 673 K, and the average ZT optimized to 0.76 in the high-temperature range of 573–723 K, representing an increase of approximately 17% compared to pristine GeTe within the same temperature range. Full article
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