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Catalysts
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Novel Catalytic Materials for Hydrogen Storage and Generation
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Novel Catalytic Materials for Hydrogen Storage and Generation

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 949

Special Issue Editor

Prof. Dr. Tarek Abdel-Fattah

E-Mail Website
Guest Editor
Department of Molecular Biology and Chemistry, Christopher Newport University, 1 Avenue of the Arts, Newport News, VA 23606, USA
Interests: hydrogen storage and generation; renewable and sustainable energy; catalytic materials; solar cell; grain boundary; perovskite

Special Issue Information

Dear Colleagues,

This Special Issue is related to hydrogen as a clean energy carrier, which holds significant promise for sustainable energy systems. However, efficient storage and generation of hydrogen present critical challenges. Recent advancements in novel materials offer promising solutions, enhancing both storage capacity and generation efficiency. The following are examples of a few materials related to this Special Issue:

  1. Metal–organic frameworks (MOFs): MOFs are crystalline materials composed of metal ions coordinated to organic ligands, creating porous structures. They are highly tunable, allowing for precise control over pore size and surface area. This tunability enables MOFs to achieve high hydrogen storage capacities at relatively low pressures. For instance, certain MOFs can store up to 7.5 wt% of hydrogen at cryogenic temperatures, making them competitive with traditional storage methods.
  2. Solid-state hydrogen storage: Solid-state hydrogen storage involves the absorption of hydrogen into solid materials such as metal hydrides, complex hydrides, and chemical hydrides. Metal hydrides like magnesium hydride (MgH2) offer high hydrogen densities and are relatively safe.
  3. Carbon-based nanomaterials: Carbon nanostructures, including graphene, carbon nanotubes (CNTs), and fullerenes, exhibit potential for hydrogen storage due to their high surface areas and favorable adsorption properties. Functionalization of these materials with metal nanoparticles can significantly enhance their hydrogen uptake.
  4. Novel catalysts for hydrogen generation: For hydrogen generation, particularly through water splitting, novel catalysts are crucial. Transition metal dichalcogenides (TMDs), such as MoS2, have emerged as effective electro-catalysts for the hydrogen evolution reaction (HER). These materials are abundant and inexpensive compared to platinum, offering a cost-effective alternative with competitive performance. Furthermore, advancements in catalyst design, including nanostructuring and defect engineering, are enhancing the efficiency of the HER.
  5. Advanced electrolytes: In hydrogen generation via electrolysis, the development of advanced electrolytes is essential. For example, proton exchange membranes (PEMs) benefit from solid polymer electrolytes that offer high proton conductivity and stability. Recent research focuses on improving the durability and efficiency of these membranes, as well as exploring anion exchange membranes (AEMs) that operate in alkaline conditions, potentially reducing system costs.

Therefore, this Special Issue aims to integrate these novel materials into hydrogen storage and generation systems, representing a significant step toward realizing a hydrogen-based energy future.

Prof. Dr. Tarek Abdel-Fattah
Guest Editor

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. Catalysts 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 2200 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

  • sustainability and renewables
  • hydrogen storage
  • hydrogen generation
  • heterogeneous catalysis
  • electrolysis
  • water splitting

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Published Papers (1 paper)

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Research

20 pages, 7534 KiB  
Article
Investigation of the Performances of TiO2 and Pd@TiO2 in Photocatalytic Hydrogen Evolution and Hydrogenation of Acetylenic Compounds for Application in Photocatalytic Transfer Hydrogenation
by Eldar T. Talgatov, Akzhol A. Naizabayev, Alima M. Kenzheyeva, Zhannur K. Myltykbayeva, Atıf Koca, Farida U. Bukharbayeva, Sandugash N. Akhmetova, Raiymbek Yersaiyn and Assemgul S. Auyezkhanova
Catalysts 2024, 14(10), 665; https://doi.org/10.3390/catal14100665 - 26 Sep 2024
Viewed by 704
Abstract
The development of effective bifunctional catalysts demonstrating high performance in both photocatalytic hydrogen evolution and selective hydrogenation of unsaturated compounds is of great interest for photocatalytic transfer hydrogenation. In this work, TiO2 and Pd@TiO2 catalysts were studied in two separate processes: [...] Read more.
The development of effective bifunctional catalysts demonstrating high performance in both photocatalytic hydrogen evolution and selective hydrogenation of unsaturated compounds is of great interest for photocatalytic transfer hydrogenation. In this work, TiO2 and Pd@TiO2 catalysts were studied in two separate processes: photocatalytic H2 evolution and conventional hydrogenation reactions. Photocatalytic properties of titanium dioxide synthesized by a simple precipitation method were compared with those of commercial ones. Commercial anatase with a lower agglomeration degree showed better activity in H2 evolution. Further modification of the commercial anatase with Pd resulted in increasing its activity, achieving an H2 evolution rate of 760 μmol/h gcat. The Pd catalysts supported on different TiO2 samples were tested in hydrogenation of acetylenic compounds. The activity of the Pd@TiO2 catalysts was found to be dependent on the photocatalytic properties of TiO2 supports. XPS studies of Pd catalysts indicated that commercial anatase with better photocatalytic properties provided easier reduction of Pd2+ to active Pd0 particles. The Pd catalyst supported on commercial anatase demonstrated the highest activity in the hydrogenation process. The WC≡C rate achieved 2.6 × 10−6, 9.0 × 10−6 and 35.7 × 10−6 mol/s for hydrogenation of 2-hexyne-1-ol, 5-hexyne-1-ol and 2-hexyne, respectively. The selectivity of the catalyst to target olefinic compounds was 94–96%. In addition, the hydrogenation rate was found to be significantly affected by reaction conditions such as hydrogen concentration and solvent composition. The WC≡C rate decreased linearly with decreasing hydrogen concentration in a H2:He gas mixture (30–100 vol%). Performing the reaction in 0.10 M NaOH ethanolic solution resulted in increasing the WC≡C rate and selectivity of the process. The Pd catalyst was reused in an alkali medium (NaOH in ethanol) for 35 runs without significant degradation in its catalytic activity. Thus, the results obtained in this work can be useful in photocatalytic transfer hydrogenation. Full article
(This article belongs to the Special Issue Novel Catalytic Materials for Hydrogen Storage and Generation)
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