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Molecules
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Synthesis and Electrochemical Properties of Transition Metal Nanomaterials
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Synthesis and Electrochemical Properties of Transition Metal Nanomaterials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 5332

Special Issue Editors

Prof. Dr. Hassan Hasan Hammud

E-Mail Website
Guest Editor
Department of Chemistry, King Faisal University, Al-Ahsa, Saudi Arabia
Interests: metal carbon nanomaterials; water treatment; electro catalysis; sensors; supercapacitors
Dr. Nadeem S. Sheikh

E-Mail Website
Guest Editor
Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Gadong BE1410, Brunei
Interests: computational chemistry; organometallics; transition metals; nanocomposites; MWCNTs

Special Issue Information

Dear Colleagues,

The synthesis and application of nanomaterials are of great interest to researchers from different disciplines of science. This is because there is a continuous need to implement nanomaterials that can act as electrocatalysts, electrochemical sensors, and electrodes for batteries, fuel cells, and supercapacitors.

This Special Issue will be focused on the synthesis of transition metal/metal oxide nanomaterials with a particular bent towards those containing carbon matrixes.

The methods used in the preparation of nanomaterials need to be clearly presented with descriptions of the various stages, materials, and equipment involved. Additionally, the characterization of the nanomaterials should reveal their unique structures that affect the properties that make them useful in electrocatalysts, electrochemical sensors, supercapacitors, batteries, and fuel cells. The characterization techniques can be Xrd, SEM, TEM, Raman, XPS, or surface area analysis. Finally, the study of the application of nanomaterials should be described in detail and compared with past work in the same field to assess the values of novel manufactured materials. The applications should mainly be in electrocatalysis and electrochemical sensors but can also be in electrodes for batteries, fuel cells, and supercapacitors.

Prof. Dr. Hassan Hasan Hammud
Dr. Nadeem S. Sheikh
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. Molecules 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 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

  • transition metals
  • nanocarbon
  • support
  • electrocatalysis, electrochemical sensors
  • fuel cells
  • battery
  • supercapacitors
  • pyrolysis
  • hydrothermal synthesis

Published Papers (3 papers)

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Research

14 pages, 5797 KiB  
Article
In Situ Preparation of Three-Dimensional Porous Nickel Sulfide as a Battery-Type Supercapacitor
by Qixun Xia, Lijun Si, Keke Liu, Aiguo Zhou, Chen Su, Nanasaheb M. Shinde, Guangxin Fan and Jun Dou
Molecules 2023, 28(11), 4307; https://doi.org/10.3390/molecules28114307 - 24 May 2023
Cited by 5 | Viewed by 1326
Abstract
A one-step sulfurization method to fabricate Ni3S2 nanowires (Ni3S2 NWs) directly on a Ni foam (NF) was developed as a simple, low-cost synthesis method for use as a supercapacitor (SC), aimed at optimizing energy storage. Ni3 [...] Read more.
A one-step sulfurization method to fabricate Ni3S2 nanowires (Ni3S2 NWs) directly on a Ni foam (NF) was developed as a simple, low-cost synthesis method for use as a supercapacitor (SC), aimed at optimizing energy storage. Ni3S2 NWs have high specific capacity and are considered a promising electrode material for SCs; however, their poor electrical conductivity and low chemical stability limit their applications. In this study, highly hierarchical three-dimensional porous Ni3S2 NWs were grown directly on NF by a hydrothermal method. The feasibility of the use of Ni3S2/NF as a binder-free electrode for achieving high-performance SCs was examined. Ni3S2/NF exhibited a high specific capacity (255.3 mAh g−1 at a current density of 3 A g−1), good rate capability (2.9 times higher than that of the NiO/NF electrode), and competitive cycling performance (capacity retention of specific capacity of 72.17% after 5000 cycles at current density of 20 A g−1). Owing to its simple synthesis process and excellent performance as an electrode material for SCs, the developed multipurpose Ni3S2 NWs electrode is expected to be a promising electrode for SC applications. Furthermore, the synthesis method of self-growing Ni3S2 NW electrodes on 3D NF via hydrothermal reactions could potentially be applied to the fabrication of SC electrodes using a variety of other transition metal compounds. Full article
(This article belongs to the Special Issue Synthesis and Electrochemical Properties of Transition Metal Nanomaterials)
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18 pages, 6263 KiB  
Article
Parametric Study of Gold Nanoparticles Synthesis under Micro-Continuous Flow Conditions
by Mohannad T. Aljarrah, Ala’a M. Alboull, Mohammad S. Alharahsheh, Azad Ashraf and Amith Khandakar
Molecules 2022, 27(24), 8651; https://doi.org/10.3390/molecules27248651 - 7 Dec 2022
Cited by 4 | Viewed by 2111
Abstract
The synthesis of gold nanoparticles (GNPs) using chemical reduction in batch and microreactor methods has been reported. A parametric study of the effect of several parameters on the size of gold nanoparticles was performed in batch synthesis mode using the modified Martin method. [...] Read more.
The synthesis of gold nanoparticles (GNPs) using chemical reduction in batch and microreactor methods has been reported. A parametric study of the effect of several parameters on the size of gold nanoparticles was performed in batch synthesis mode using the modified Martin method. The best-obtained conditions were used to synthesize gold nanoparticles using a glass chip microreactor, and the size of the resulting GNPs from both methods was compared. The presence of polyvinyl alcohol (SC) was used as a capping agent, and sodium borohydride (SB) was used as a reducing agent. Several parameters were studied, including HAuCl4, SC, SB concentrations, the volumetric ratio of SB to gold precursor, pH, temperature, and mixing speed. Various techniques were used to characterize the resulting nanoparticles, including Atomic Absorbance spectroscopy (AAS), Ultraviolet-visible spectroscopy (UV-Vis), and dynamic light scratching (DLS). Optimum conditions were obtained for the synthesis of gold nanoparticles. Under similar reaction conditions, the microreactor consistently produced smaller nanoparticles in the range of 10.42–11.31 nm with a reaction time of less than 1 min. Full article
(This article belongs to the Special Issue Synthesis and Electrochemical Properties of Transition Metal Nanomaterials)
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14 pages, 3043 KiB  
Article
Preparation, Characterization, and Electrochemical Performance of the Hematite/Oxidized Multi-Walled Carbon Nanotubes Nanocomposite
by Hadeel M. Banbela, Laila M. Alharbi, Reema H. Al-Dahiri, Mariusz Jaremko and Mohamed Abdel Salam
Molecules 2022, 27(9), 2708; https://doi.org/10.3390/molecules27092708 - 22 Apr 2022
Cited by 3 | Viewed by 1530
Abstract
In this research work, a hematite (α-Fe2O3) nanoparticle was prepared and then mixed with oxidized multi-walled carbon nanotubes (O-MWCNT) to form a stable suspension of an α-Fe2O3/O-MWCNTs nanocomposite. Different characterization techniques were used to explore [...] Read more.
In this research work, a hematite (α-Fe2O3) nanoparticle was prepared and then mixed with oxidized multi-walled carbon nanotubes (O-MWCNT) to form a stable suspension of an α-Fe2O3/O-MWCNTs nanocomposite. Different characterization techniques were used to explore the chemical and physical properties of the α-Fe2O3/O-MWCNTs nanocomposite, including XRD, FT-IR, UV-Vis, and SEM. The results revealed the successful formation of the α-Fe2O3 nanoparticles, and the oxidation of the MWCNT, as well as the formation of stable α-Fe2O3/O-MWCNTs nanocomposite. The electrochemical behaviour of the α-Fe2O3/O-MWCNTs nanocomposite was investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV), and the results revealed that modification of α-Fe2O3 nanoparticles with O-MWCNTs greatly enhanced electrochemical performance and capacitive behaviour, as well as cycling stability. Full article
(This article belongs to the Special Issue Synthesis and Electrochemical Properties of Transition Metal Nanomaterials)
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