Catalysis by Metals and Metal Oxides

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

Deadline for manuscript submissions: 5 September 2025 | Viewed by 619

Special Issue Editor


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LAQV/REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, Largo da Torre, 2829-516 Caparica, Portugal
Interests: gold; nanoparticles; catalysis; carbon; oxides; oxidation; heterogenization; alcohols; alkanes
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Special Issue Information

Dear Colleagues,

We are pleased to announce a Special Issue dedicated to the topic of “Catalysis by Metals and Metal Oxides”. We invite researchers from academia and industry to contribute original research articles and reviews that explore the latest advancements in metal and metal oxide catalysis, as well as their applications in energy, environment, and chemical processes.

Scope of the Special Issue:

This Special Issue aims to highlight recent developments in the understanding and application of metal and metal oxide catalysts across a wide range of reactions. We welcome papers that focus on, but are not limited to, the following areas:

  • Design and synthesis of metal and metal oxide catalysts;
  • Novel metal oxide materials for catalysis;
  • Catalytic properties of transition metals and their complexes;
  • Surface modifications and nanostructuring of metal oxides;
  • Mechanistic insights into metal and metal oxide catalysis;
  • Reaction pathways, intermediates, and active sites;
  • Characterization techniques to probe metal and metal oxide surfaces;
  • Role of electronic and structural effects in catalysis;
  • Catalytic applications;
  • Catalysis in energy production and conversion (e.g., hydrogenation, fuel cells, batteries);
  • Environmental catalysis (e.g., CO2 reduction, VOC removal, NOx reduction);
  • Industrial catalytic processes (e.g., fine chemical production, polymerization reactions);
  • Green chemistry and sustainable catalytic processes;
  • Emerging topics in metal and metal oxide catalysis;
  • Bimetallic catalysts and hybrid materials;
  • Photocatalysis and electrocatalysis involving metals and metal oxides;
  • Advances in catalysis under extreme conditions (high pressure, temperature, etc.).

If you would like to submit papers to this Special Issue or have any questions, please contact the in-house editor, Ms. Rita Lin (rita.lin@mdpi.com).

Dr. Sónia Carabineiro
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

  • catalysis
  • metals
  • metal oxides
  • nanocatalysts
  • synthesis
  • characterization

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Published Papers (2 papers)

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Research

19 pages, 35077 KiB  
Article
X-Ray Emissions from Hydrogen Rydberg Matter Detected Using Timepix3 CdTe Detector
by Sindre Andre Zeiner-Gundersen and Sveinn Olafsson
Catalysts 2025, 15(6), 526; https://doi.org/10.3390/catal15060526 - 26 May 2025
Viewed by 30
Abstract
This study investigates the X-ray emissions from Hydrogen Rydberg Matter (HRM) using a state of-the-art Timepix3 detector with a Cadmium Telluride (CdTe) sensor, which offers imaging operation. The experimental setup featured an ultra-high vacuum (UHV) chamber containing potassium-doped iron oxide catalytic source, exposed [...] Read more.
This study investigates the X-ray emissions from Hydrogen Rydberg Matter (HRM) using a state of-the-art Timepix3 detector with a Cadmium Telluride (CdTe) sensor, which offers imaging operation. The experimental setup featured an ultra-high vacuum (UHV) chamber containing potassium-doped iron oxide catalytic source, exposed to hydrogen or deuterium gas flowing through the source. A 1064 nm pulsed YAG laser was used to stimulate the HRM. The Timepix detector was calibrated with Cs-137 662 keV and 21 keV source. Results show a prominent emission peak in the 25–50 keV range, with significant contributions at 406 keV identified through aluminum foil attenuation experiments. These findings advance our understanding of radiation phenomena in hydrogen-loaded systems and suggest new avenues for exploring the unique emissions from HRM, potentially impacting material science and catalysis. Full article
(This article belongs to the Special Issue Catalysis by Metals and Metal Oxides)
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27 pages, 8137 KiB  
Article
Graphene Oxide-Supported Metal Catalysts for Selective Hydrogenation of Cinnamaldehyde: Impact of Metal Choice and Support Structure
by Martina Pitínová, Iryna Danylo, Ayesha Shafiq, Tomáš Hartman, Mariia Khover, Berke Sevemez, Lukáš Koláčný and Martin Veselý
Catalysts 2025, 15(5), 470; https://doi.org/10.3390/catal15050470 - 10 May 2025
Viewed by 345
Abstract
This study explores the selective hydrogenation of cinnamaldehyde using a series of metal catalysts supported on reduced graphene oxide (rGO) and conventional activated carbon (AC). Catalysts based on Pt, Pd, Rh, Ru, and Co were synthesized with controlled metal loading and characterized by [...] Read more.
This study explores the selective hydrogenation of cinnamaldehyde using a series of metal catalysts supported on reduced graphene oxide (rGO) and conventional activated carbon (AC). Catalysts based on Pt, Pd, Rh, Ru, and Co were synthesized with controlled metal loading and characterized by XRD, SEM-EDS, XRF, and TEM. Among all tested materials, Pd supported on rGO synthesized via the Tour method (Pd/rTOGO) exhibited the highest catalytic activity, achieving 62% conversion of cinnamaldehyde and superior selectivity toward hydrocinnamaldehyde (HCAL). The support material had a significant influence on performance, especially for Pd catalysts, where 2D rGO outperformed 3D AC in both conversion and selectivity. In contrast, other metals (Pt, Rh, Ru, Co) showed only modest activity and limited selectivity tuning via support choice. Notably, GC-MS analysis revealed the formation of a previously underreported side product, 3-isopropoxy-propan-1-yl benzene (ether), likely formed via reductive etherification in isopropanol. The combined kinetic and selectivity data enabled the proposal of reaction pathways, including rapid transformation of cinnamylalcohol (COL) to hydrocinnamal alcohol (HCOL) and HCAL to ether. These findings emphasize the importance of support structure and surface functionality, particularly in 2D carbon materials, for designing efficient and selective hydrogenation catalysts. Full article
(This article belongs to the Special Issue Catalysis by Metals and Metal Oxides)
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