Recent Achievements in Coatings Electroplating from Non-aqueous Electrolytes

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 4832

Special Issue Editors


E-Mail Website
Guest Editor
Faculty of Non-Ferrous Metals, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
Interests: electrochemistry; electroplating; electrocatalysis; noble-metals alloys; semiconductors synthesis
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Graduate School of Engineering Science, Akita University, Akita 010-8502, Japan
Interests: electrochemistry; electroplating; hydrogen; molten salt; solid electrolyte

Special Issue Information

Dear Colleagues,

Electrochemical synthesis for coatings and thin-film deposition is a popular research trend. The vast majority of galvanic alloys are synthesized from water baths of various compositions and in the presence of complexing substances.

In recent decades, great emphasis has been placed on developing ecological baths based on non-toxic complexing agents such as citrates, gluconates, tartrates, EDTA salts and glutamates. However, because their main component is water, these solutions are often characterized by limited efficiency caused by water’s narrow electrochemical stability window, i.e., the consumption of charge through the decomposition of water. Moreover, this phenomenon significantly limits the number of elements deposited by the cathodic reduction in the form of thin films and coatings. Using non-aqueous baths with a much wider electrolytic stability window may present a solution to this issue.

The most popular system in this category is high-temperature molten salts used in large-scale aluminium production. These types of electrolytes are classified as ionic liquids, which have been rapidly developed over the last two decades due largely to the use of lithium in the production of high-performance lithium-ion batteries.

This Special Issue aims to collect the most valuable and cutting-edge findings related to synthesizing coatings and thin films with various properties and applications that have been electrochemically deposited from non-aqueous electrolytes based on ionic liquids, alcohols, molten salts and other organic solvents.

Topics of interest include:

  • Recent developments in multi-functional coating synthesis from organic/ inorganic electrolytes;
  • Investigations of the metal ion complexing and electrolyte formation in non-aqueous systems;
  • Electrochemical behaviour of different organic/inorganic solvents in the metal plating process;
  • Novel binary/ternary / multi-elemental alloys electrodeposition from non-aqueous solutions and their characterization;
  • Achievements in molten salt electrochemistry from the lab and industrial scale;
  • Ionic liquids for electrochemistry—synthesis, characterization and application.

Dr. Dawid Kutyła
Dr. Michihisa Fukumoto
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. Coatings 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 2600 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

  • non-aqueous solutions
  • coatings’ electrodeposition
  • ionic liquids
  • molten salts
  • inorganic electrolytes

Published Papers (3 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

25 pages, 6461 KiB  
Article
The Influence of the Magnetic Field on Ni Thin Film Preparation by Electrodeposition Method and Its Electrocatalytic Activity towards Hydrogen Evolution Reaction
by Safya Elsharkawy, Dawid Kutyła and Piotr Zabinski
Coatings 2023, 13(10), 1816; https://doi.org/10.3390/coatings13101816 - 23 Oct 2023
Cited by 3 | Viewed by 1544
Abstract
Ni thin films were synthesized through the electrodeposition method from three different electrolytes (acetate, borate, and citrate). Furthermore, they were assessed as electrocatalysts for hydrogen evolution reaction (HER) in 1 M NaOH. Herein, various electrodeposition parameters, such as the pH of the electrolytes, [...] Read more.
Ni thin films were synthesized through the electrodeposition method from three different electrolytes (acetate, borate, and citrate). Furthermore, they were assessed as electrocatalysts for hydrogen evolution reaction (HER) in 1 M NaOH. Herein, various electrodeposition parameters, such as the pH of the electrolytes, the deposition potential, and the influence of the magnetic field, were measured. We compared the different morphologies and characteristics depending on the thin film electrodeposition process parameters. Moreover, we studied the material’s wettability changes based on the electrolyte’s composition and the applied external magnetic field. It was found that the deposited Ni thin film from the citrate electrolyte under the influence of the magnetic field in the perpendicular direction to the electrode surface had the best catalytic performance to HER. It possessed an overpotential value of 231 mV and a Tafel slope of 118 mV dec−1. The deposition process was accomplished by using the chronoamperometry technique. Measuring scanning electron microscope and X-ray diffraction were used to characterize the fabricated films’ surface morphologies and crystalline structures. Full article
Show Figures

Figure 1

9 pages, 4524 KiB  
Article
Effect of Pt Addition on the Formation of Ni–Pt Porous Layer
by Kano Nakajima, Hiroki Takahashi and Michihisa Fukumoto
Coatings 2022, 12(11), 1645; https://doi.org/10.3390/coatings12111645 - 30 Oct 2022
Cited by 1 | Viewed by 1202
Abstract
A Ni–Pt alloy porous layer was formed by electrodepositing Pt using Ni as the substrate sample, followed by Al-depositing and Al-dissolving. The Pt was electrolyzed using an aqueous solution as the medium, and the Al-depositing and Al-dissolving were treated using a molten salt [...] Read more.
A Ni–Pt alloy porous layer was formed by electrodepositing Pt using Ni as the substrate sample, followed by Al-depositing and Al-dissolving. The Pt was electrolyzed using an aqueous solution as the medium, and the Al-depositing and Al-dissolving were treated using a molten salt as the medium. The molten salt used was NaCl–KCl with 3.5 mol% AlF3 added. It was found that Pt electrodeposition formed on the surface had a finer structure. Furthermore, it was clarified that the lower the electrodeposition potential, the thicker the Ni-Pt alloy porous layer. The cathode polarization curve was measured in KOH solution, and the hydrogen gas was determined when a constant voltage electrolysis was performed with a hydrogen detection gas sensor using a tubular yttria-stabilized zirconia (8 mol% Y2O3–ZrO2). Full article
Show Figures

Figure 1

14 pages, 4232 KiB  
Article
Formation of LaNi5 Hydrogen Storage Alloy by Electrodeposition of La Using Molten Salt
by Michihisa Fukumoto, Kano Nakajima and Hiroki Takahashi
Coatings 2022, 12(9), 1268; https://doi.org/10.3390/coatings12091268 - 31 Aug 2022
Cited by 2 | Viewed by 1515
Abstract
A hydrogen storage alloy was formed by electrodepositing La using a molten salt. La was electrodeposited using Ni as a substrate in NaCl-KCl-5.0 mol% LaF3 molten salt at electrodeposition temperatures of 750 °C and 900 °C. The electrodeposition potential was −2.25 V. [...] Read more.
A hydrogen storage alloy was formed by electrodepositing La using a molten salt. La was electrodeposited using Ni as a substrate in NaCl-KCl-5.0 mol% LaF3 molten salt at electrodeposition temperatures of 750 °C and 900 °C. The electrodeposition potential was −2.25 V. The LaNi5 hydrogen storage alloy was then prepared by the electrodeposition of La and the mutual diffusion of the Ni substrate. As a result, it was clarified that La can be electrodeposited by using a molten salt. Single-phase LaNi5 was produced at 750 °C rather than at 900 °C. It became possible to uniformly form LaNi5, an intermetallic compound, on the substrate surface. The prepared hydrogen storage alloy was exposed to Ar-10%H2 to store hydrogen; at this time, hydrogen was stored by changing the sample temperature. The discharged hydrogen was measured by a gas sensor. It was clarified that the hydrogen storage and hydrogen discharge were the highest in the sample obtained by electrodepositing La for 1 h at 750 °C. LaNi5 formed by electrodeposition showed hydrogen storage properties, and this method was found to be effective even for samples with complex shapes. Full article
Show Figures

Figure 1

Back to TopTop