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Journals
Catalysts
Special Issues
New Horizons for Heterogeneous Catalysts
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New Horizons for Heterogeneous Catalysts

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

Deadline for manuscript submissions: closed (15 November 2021) | Viewed by 10266

Special Issue Editors

Prof. Dr. Jaroslaw Polanski

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Guest Editor
Faculty of Science and Technology, Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
Interests: heterogeneous catalysis; nanocatalysis; porous solids; catalytic carbon (di)oxide methanation; catalytic biomass conversion
Special Issues, Collections and Topics in MDPI journals
Dr. Piotr Bartczak

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Guest Editor
Faculty of Science and Technology, Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
Interests: catalytic organic synthesis; preparation of nanostructures, including nanocatalysts; catalytic synthesis in gase phase
Special Issues, Collections and Topics in MDPI journals
Dr. Tomasz Siudyga

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Guest Editor
Faculty of Science and Technology, Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
Interests: removing pollutants in air and industrial gases; catalytic conversion of carbon dioxide; hydrogen production in catalytic processes; synthesis of fuels from wastes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are at the point where, looking back, we can see how much nanotechnology has developed since Feynman's time. Keeping in mind what has been achieved in this area to date, we still see "plenty of room at the bottom". With each step, we move the horizon, noticing new and practical applications for novel nano-catalytic systems.

Particularly interesting are aspects of catalytic reactions, such as the synthesis of clean fuels (for example hydrogen), the reduction of air and water pollutants, and selective organic synthesis in line with the principles of green chemistry and atomic economy.

This Special Issue is focused on advanced nanomaterials for energy industry, environmental protection, and chemical synthesis. If you have a proposal for a new article that promotes this topic, or your research is moving towards the horizon of new nano-catalyst applications, you are invited to send us this material for inclusion in our Special Issue.

Prof. Dr. Jaroslaw Polanski
Dr. Piotr Bartczak
Dr. Tomasz Siudyga
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. 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 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

  • nanomaterials
  • heterogeneous catalysis
  • clean fuels
  • catalytic hydrogen production
  • water purification
  • air purification
  • DeNOx reaction
  • photocatalysis
  • electrocatalysis
  • green synthesis

Published Papers (4 papers)

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12 pages, 3876 KiB  
Article
Morphology and Catalytic Performance of MoS2 Hydrothermally Synthesized at Various pH Values
by Seung-Jae Lee, Yang-Seung Son, Jin-Hoon Choi, Seong-Soo Kim and Sung-Youl Park
Catalysts 2021, 11(10), 1229; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11101229 - 12 Oct 2021
Cited by 13 | Viewed by 2304
Abstract
Although preparation conditions are known to affect the morphology and catalytic performance of hydrothermally synthesized MoS2, the influence of pH remains unclear. Herein, unsupported MoS2 was prepared from ammonium tetrathiomolybdate (ATTM) by a hydrothermal reaction at various pH values under [...] Read more.
Although preparation conditions are known to affect the morphology and catalytic performance of hydrothermally synthesized MoS2, the influence of pH remains unclear. Herein, unsupported MoS2 was prepared from ammonium tetrathiomolybdate (ATTM) by a hydrothermal reaction at various pH values under a reaction pressure of 2 MPa. The physical and chemical properties of the MoS2 samples were characterized, and the catalytic performance for CO methanation was examined. With increasing pH, the morphology of the MoS2 particles transformed from aggregates of irregular grain-like particles to flower-like particles through the agglomeration of fine mesoporous nanoflakes. Hydrothermal synthesis at a pH of 9.5 increased the MoS2 crystallinity by enhancing the stacking of the (0 0 2) lattice plane. The MoS2 samples prepared at pH 7.0 and 9.5 showed increased CO conversion during methanation, which was associated with a low concentration of Mo5+ species and the presence of surface sulfate species. Thus, a high pH during catalyst preparation may promote the complete decomposition of ATTM to MoS2 and the formation of sulfur vacancies, which can facilitate methanation. Full article
(This article belongs to the Special Issue New Horizons for Heterogeneous Catalysts)
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15 pages, 3332 KiB  
Article
Low-Temperature Synthesis and Catalytic Activity of Cobalt Ferrite in Nitrous Oxide (N2O) Decomposition Reaction
by Kristina Denisova, Alexander A. Ilyin, Ruslan Rumyantsev, Julia Sakharova, Alexander P. Ilyin and Natalya Gordina
Catalysts 2021, 11(8), 889; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11080889 - 22 Jul 2021
Cited by 4 | Viewed by 2152
Abstract
Cobalt ferrite (CoFe2O4) nanoparticles were synthesized and investigated as a catalyst in the reaction of nitrous oxide (N2O) decomposition. Cobalt ferrite was synthesized by solid–phase interaction at 1100 °C and by preliminary mechanochemical activation in a roller-ring [...] Read more.
Cobalt ferrite (CoFe2O4) nanoparticles were synthesized and investigated as a catalyst in the reaction of nitrous oxide (N2O) decomposition. Cobalt ferrite was synthesized by solid–phase interaction at 1100 °C and by preliminary mechanochemical activation in a roller-ring vibrating mill at 400 °C. The nanoparticles were characterized by X-ray diffraction (XRD), synchronous thermal analysis (TG and DSC) and scanning electron microscopy (SEM). A low-temperature nitrogen adsorption/desorption test was used to evaluate the catalytic activity of the cobalt ferrite nanoparticles. Correlations between the structure and catalytic properties of the catalysts are reported. The highest catalytic activity of CoFe2O4 in the reaction of nitrous oxide decomposition was 98.1% at 475 °C for cobalt ferrite obtained by mechanochemical activation. Full article
(This article belongs to the Special Issue New Horizons for Heterogeneous Catalysts)
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10 pages, 1889 KiB  
Article
On the Oxygen Reduction Reaction Mechanism Catalyzed by Pd Complexes on 2D Carbon. A Theoretical Study
by Marco Bonechi, Walter Giurlani, Martina Vizza, Matteo Savastano, Andrea Stefani, Antonio Bianchi, Claudio Fontanesi and Massimo Innocenti
Catalysts 2021, 11(7), 764; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11070764 - 24 Jun 2021
Cited by 7 | Viewed by 2891
Abstract
Oxygen Reduction Reaction (ORR) is the bottle-neck strategic reaction ruling the fuel cell efficiency process. The slow kinetics of the reaction require highly effective electrocatalysts for proper boosting. In this field, composite catalysts formed by carbon nanotubes functionalized with palladium(II) complexes showed surprising [...] Read more.
Oxygen Reduction Reaction (ORR) is the bottle-neck strategic reaction ruling the fuel cell efficiency process. The slow kinetics of the reaction require highly effective electrocatalysts for proper boosting. In this field, composite catalysts formed by carbon nanotubes functionalized with palladium(II) complexes showed surprising catalytic activity comparable to those of a commercial Pt electrode, but the catalytic mechanisms of these materials still remain open to discussion. In this paper, we propose the combination of experimental and theoretical results to unfold the elementary reaction steps underlying the ORR catalysis. Full article
(This article belongs to the Special Issue New Horizons for Heterogeneous Catalysts)
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10 pages, 8873 KiB  
Article
H2-Rich and Tar-Free Downstream Gasification Reaction of EFB by Using the Malaysian Dolomite as a Secondary Catalyst
by Mohammed Mahmoud Ahmad Al-Obaidi, Nor Shafizah Ishak, Salmiaton Ali, Nor Anisa Arifin, Raja Mohamad Hafriz Raja Shahruzzaman, Wan Azlina Wan Abdul Karim Ghani, Taufiq-Yap Yun Hin and Abdul Halim Shamsuddin
Catalysts 2021, 11(4), 447; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11040447 - 30 Mar 2021
Cited by 13 | Viewed by 2104
Abstract
In this study, Malaysian dolomites as secondary catalysts are placed at the downstream of the fluidized-bed gasifier. Three types of Malaysian dolomites with different elemental ratios of CaO-MgO content denoted as P1, P2, and P3 are investigated with EFB gasification reaction at different [...] Read more.
In this study, Malaysian dolomites as secondary catalysts are placed at the downstream of the fluidized-bed gasifier. Three types of Malaysian dolomites with different elemental ratios of CaO-MgO content denoted as P1, P2, and P3 are investigated with EFB gasification reaction at different cracking temperatures (700–900 °C). The performance of the catalysts with a variation of catalyst to biomass weight ratio (C/B) (0.05 to 0.30 w/w) is evaluated. The findings showed that the total gas yield increased by 20%, hydrogen increased by 66%, along with an almost 99% reduction in tar content with P1 catalyst with the following reaction conditions: gasification temperature of 850 °C, equivalence ratio (ER) of 0.25, and cracking temperature of 900 °C. Malaysia dolomite could be a secondary catalyst to provide a better alternative, tar-free hydrogen-rich gas with the possibility of regeneration and re-use. Full article
(This article belongs to the Special Issue New Horizons for Heterogeneous Catalysts)
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