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Editorial Board Members’ Collection Series: Nanomaterials for Electrochemical Energy Production and Storage

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

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 2392

Special Issue Editors


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Guest Editor
Department of Chemistry, National Institute for Materials Advancement, Pittsburg State University, Pittsburg, KS 66762, USA
Interests: green energy production and storage using conducting polymers and composites; electrocatalysts; fuel cells; supercapacitors; batteries; nanomaterials; optoelectronics; photovoltaics devices; organic–inorganic hetero-junctions for sensors; nanomagnetism; bio-based polymers
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Republic of Korea
Interests: electrochemical energy storage and conversion system; energy nanomaterials; nanocarbons and carbon fibers; functional nanofibers; supercapacitors; electrocatalysts; metal nanoparticles; biosensors; fuel cells; layer-by-layer self-assembled thin films and capsules; nanostructured molecular nanocomposites; hydrogels; hybrid POSS materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials are largely credited for the advancement of science and technologies. Many materials have unique properties and characteristics at the nanoscale. Due to these unique features, nanomaterials are used in all fields of science and technology. Their properties can be further tuned by altering their morphology, designing nanocomposites, altering their phases, and modifying their electronic environment. Such tunability results in enhanced electrochemical behavior, which makes nanomaterials highly suitable for electrochemical energy applications. For example, nanostructured electrocatalysts show improved performance in the production of hydrogen and oxygen via the water-splitting process. The use of nanomorphology has been shown to provide sites with high catalytic activity, and tuning their electronic environment can further enhance their catalytic activity. This Special Issue, entitled “Nanomaterials for Electrochemical Energy Production and Storage”, welcomes original research and review articles highlighting the use and role of nanomaterials for energy applications.

Dr. Ram K. Gupta
Prof. Dr. Byoung-Suhk Kim
Guest Editors

Manuscript Submission Information

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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

  • electrochemical energy
  • fuel cells
  • solar cells
  • batteries
  • supercapacitors
  • electrocatalysts
  • hydrogen evolution
  • oxygen evolution
  • energy storage
  • nanomaterials
  • carbons
  • metal oxides
  • chalcogenides
  • thin films
  • 2D materials
  • layered materials

Published Papers (2 papers)

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Research

19 pages, 9493 KiB  
Article
IrO2 Oxygen Evolution Catalysts Prepared by an Optimized Photodeposition Process on TiO2 Substrates
by Angeliki Banti, Christina Zafeiridou, Michail Charalampakis, Olga-Niki Spyridou, Jenia Georgieva, Vasileios Binas, Efrosyni Mitrousi and Sotiris Sotiropoulos
Molecules 2024, 29(10), 2392; https://doi.org/10.3390/molecules29102392 - 19 May 2024
Viewed by 586
Abstract
Preparing high-performance oxygen evolution reaction (OER) catalysts with low precious metal loadings for water electrolysis applications (e.g., for green hydrogen production) is challenging and requires electrically conductive, high-surface-area, and stable support materials. Combining the properties of stable TiO2 with those of active [...] Read more.
Preparing high-performance oxygen evolution reaction (OER) catalysts with low precious metal loadings for water electrolysis applications (e.g., for green hydrogen production) is challenging and requires electrically conductive, high-surface-area, and stable support materials. Combining the properties of stable TiO2 with those of active iridium oxide, we synthesized highly active electrodes for OER in acidic media. TiO2 powders (both commercially available Degussa P-25® and hydrothermally prepared in the laboratory from TiOSO4, either as received/prepared or following ammonolysis to be converted to titania black), were decorated with IrO2 by UV photodeposition from Ir(III) aqueous solutions of varied methanol scavenger concentrations. TEM, EDS, FESEM, XPS, and XRD measurements demonstrate that the optimized version of the photodeposition preparation method (i.e., with no added methanol) leads to direct deposition of well-dispersed IrO2 nanoparticles. The electroactive surface area and electrocatalytic performance towards OER of these catalysts have been evaluated by cyclic voltammetry (CV), Linear Sweep Voltammetry (LSV), and Electrochemical Impedance Spectroscopy (EIS) in 0.1 M HClO4 solutions. All TiO2-based catalysts exhibited better mass-specific (as well as intrinsic) OER activity than commercial unsupported IrO2, with the best of them (IrO2 on Degussa P-25® ΤiO2 and laboratory-made TiO2 black) showing 100 mAmgIr−1 at an overpotential of η = 243 mV. Chronoamperometry (CA) experiments also proved good medium-term stability of the optimum IrO2/TiO2 electrodes during OER. Full article
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13 pages, 4094 KiB  
Article
Electrocatalytic Performance of MnMoO4-rGO Nano-Electrocatalyst for Methanol and Ethanol Oxidation
by Parisa Salarizadeh, Sadegh Azizi, Hossein Beydaghi, Ahmad Bagheri and Mohammad Bagher Askari
Molecules 2023, 28(12), 4613; https://doi.org/10.3390/molecules28124613 - 7 Jun 2023
Cited by 2 | Viewed by 1373
Abstract
Today, finding low-cost electro-catalysts for methanol and ethanol oxidation with high performance and stability is one of the new research topics. A nanocatalyst based on metal oxides in the form of MnMoO4 was synthesized by a hydrothermal method for methanol (MOR) and [...] Read more.
Today, finding low-cost electro-catalysts for methanol and ethanol oxidation with high performance and stability is one of the new research topics. A nanocatalyst based on metal oxides in the form of MnMoO4 was synthesized by a hydrothermal method for methanol (MOR) and ethanol (EOR) oxidation reactions. Adding reduced graphene oxide (rGO) to the catalyst structure improved the electrocatalytic activity of MnMoO4 for the oxidation processes. The crystal structure and morphology of the MnMoO4 and MnMoO4-rGO nanocatalysts were investigated by physical analyses such as scanning electron microscopy and X-ray diffraction. Their abilities for MOR and EOR processes in an alkaline medium were evaluated by performing electrochemical tests such as cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. MnMoO4-rGO showed oxidation current densities of 60.59 and 25.39 mA/cm2 and peak potentials of 0.62 and 0.67 V in MOR and EOR processes (at a scan rate of 40 mV/s), respectively. Moreover, stabilities of 91.7% in MOR and 88.6% in EOR processes were obtained from the chronoamperometry analysis within 6 h. All these features make MnMoO4-rGO a promising electrochemical catalyst for the oxidation of alcohols. Full article
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