Special Issue "Nanostructured Electrochemical Devices"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 20 November 2021.

Special Issue Editor

Prof. Rosalinda Inguanta
E-Mail Website
Guest Editor
University of Palermo, Department of Engeneering (DI), Palermo, Italy
Interests: nanomaterials; electrochemical devices; sensors; batteries; electrolyzers; solar cells; galvanic deposition; template electrosynthesis; biocoatings; metal recovery from e-weste

Special Issue Information

Dear Colleagues:

Nanotechnologies are currently envisaged to revolutionize medicine, manufacturing, energy production, and other fundamental features of everyday life in the 21st Century.

Nanomaterials are very promising for enhancing device performances for sensing, sustainable energy production, and energy conversion and storage, as extensively reported in the literature. In this field, one of the most severe challenges is to find suitable methods for fabricating nanomaterials. Over the years, numerous preparation methods have been proposed in the literature, but not all of them are easily scalable and economically advantageous for industrial application. In this context, electrochemical deposition in a template is a facile method for fabricating either two- or one-dimensional nanostructured materials because it allows easily adjusting the fundamental parameters controlling their final features. In addition, electrochemical processes are usually cheap and environmentally friendly, and they can be easily scaled up from lab to industrial level. For these reasons, different electrodeposition methods were studied (galvanic deposition, galvanostatic, potentiostatic, and cyclovoltammetric deposition) for the synthesis of different types of nanomaterials for application in electrochemical sensing, in batteries (lead–acid, lithium–ion, and so on), in solar cells, and in electrochemical water splitting. Further, nanotechnology is advantageous for improving the performances of electrochemical devices. The use of nanostructured materials is in fact a strategy employed by several researchers because electrochemical activity strongly depends on the electrode surface area, which is one of the principal characteristics of the low sized materials. In fact, a high specific surface ensures a complete utilization degree of the electroactive area of the nanostructured device. In addition, in the case of electrodes with ordered arrays of nanowires or nanotubes, the spatial orientation/arrangement of array and the corresponding interactions between the neighboring nano-units have a large influence on the overall device performance.

Prof. Rosalinda Inguanta
Guest Editor

Keywords

  • nanomaterials
  • electrochemical devices
  • sensors
  • batteries
  • electrolyzers
  • solar cells

Published Papers (1 paper)

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Research

Open AccessFeature PaperArticle
Hydrothermal Cobalt Doping of Titanium Dioxide Nanotubes towards Photoanode Activity Enhancement
Materials 2021, 14(6), 1507; https://doi.org/10.3390/ma14061507 - 19 Mar 2021
Viewed by 327
Abstract
Doping and modification of TiO2 nanotubes were carried out using the hydrothermal method. The introduction of small amounts of cobalt (0.1 at %) into the structure of anatase caused an increase in the absorption of light in the visible spectrum, changes in [...] Read more.
Doping and modification of TiO2 nanotubes were carried out using the hydrothermal method. The introduction of small amounts of cobalt (0.1 at %) into the structure of anatase caused an increase in the absorption of light in the visible spectrum, changes in the position of the flat band potential, a decrease in the threshold potential of water oxidation in the dark, and a significant increase in the anode photocurrent. The material was characterized by the SEM, EDX, and XRD methods, Raman spectroscopy, XPS, and UV-Vis reflectance measurements. Electrochemical measurement was used along with a number of electrochemical methods: chronoamperometry, electrochemical impedance spectroscopy, cyclic voltammetry, and linear sweep voltammetry in dark conditions and under solar light illumination. Improved photoelectrocatalytic activity of cobalt-doped TiO2 nanotubes is achieved mainly due to its regular nanostructure and real surface area increase, as well as improved visible light absorption for an appropriate dopant concentration. Full article
(This article belongs to the Special Issue Nanostructured Electrochemical Devices)
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