Metal Catalyst Discovery, Design and Synthesis

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Materials".

Deadline for manuscript submissions: 31 January 2025 | Viewed by 3158

Special Issue Editors


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Guest Editor
Center for Catalysis and Surface Science, Northwestern University, Evanston, IL 60208, USA
Interests: nanocatalyst; atomic layer deposition; surface science; heterogenous catalysis; oxidative dehydrogenation; biomass conversion; selective hydrogenation

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Guest Editor
Department of Chemistry, Maynooth University, W23 F2K8 Maynooth, Ireland
Interests: computational chemistry; quantum chemistry; theoretical spectroscopy; transition metal chemistry; bioinorganic chemistry; main group chemistry; small molecule activation; organometallic catalysis; electronic structure and bonding of metal clusters

Special Issue Information

Dear Colleagues,

Catalysts remain an indispensable piece of kit in the synthetic chemist’s toolbox that facilitates chemical transformations with efficiency and selectivity. Utilised both in the production of fine and bulk chemicals, an estimated 90% of all chemical products encounter some form of catalyst during their manufacture. Transition metals and their complexes are considered the pillars of this arena owing to their redox properties and proclivity to facilitate bond breaking and formation steps. Their catalytic performance critically depends on the balanced choice of metal centre, coordination sphere, counterions and reaction conditions. With a view to creating greener and more economical chemical processes, there will be a growing emphasis on accelerating the search for sustainable catalyst platforms, encouraging researchers to innovate new strategies. Whilst the development of new catalysts with tailored properties often depends on trial-and-error experimentation, these processes are now routinely directed by computational approaches that provide insight into structures, mechanisms and selectivities of catalytic transformations. Advanced nano-synthetic techniques with cutting-edge characterization tools synergistically coordinate with the established models to lead the designed catalysts to the real world.

This Special Issue delves into the multifaceted realm of catalyst design, exploring state-of-the-art experimental and computational strategies used for the de novo design of catalysts or their optimisation towards enhanced activity, stability, and selectivity. Contributions are invited within a broad thematic scope, including mechanistic studies, process development and synthetic strategies for catalyst design and optimisation.

Dr. Geun-Ho Han
Dr. Tobias Krämer
Guest Editors

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Keywords

  • catalyst design
  • computer-aided design and modeling
  • machine learning
  • biomimetic catalysts
  • cooperativity
  • machine learning
  • reaction mechanism
  • nanosynthesis
  • atomic-level characterization
  • main group metals
  • transition metals
  • synergy between theory and experiment

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Published Papers (2 papers)

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Research

12 pages, 5596 KiB  
Article
ZnO and ZnO/Ce Powders as Tribocatalysts for Removal of Tetracycline Antibiotic
by Dobrina Ivanova, Hristo Kolev, Bozhidar I. Stefanov and Nina Kaneva
Inorganics 2024, 12(9), 244; https://doi.org/10.3390/inorganics12090244 - 5 Sep 2024
Viewed by 873
Abstract
Research on tribocatalysis, which involves the triboelectric effect, is based on the concept that friction between dissimilar materials can generate charges capable of initiating catalytic reactions. This phenomenon holds significant potential for the degradation of wastewater contaminants in the environment. In this study, [...] Read more.
Research on tribocatalysis, which involves the triboelectric effect, is based on the concept that friction between dissimilar materials can generate charges capable of initiating catalytic reactions. This phenomenon holds significant potential for the degradation of wastewater contaminants in the environment. In this study, pure and Ce-modified (2 mol%) ZnO powders were investigated as tribocatalysts for the degradation of doxycycline (DC), a tetracycline antibiotic, in the absence of light. The research demonstrates that friction between the catalyst, the beaker, and the polytetrafluoroethylene (PTFE) magnetic rod induces charge transfer at their interfaces, leading to the breakdown of pollutants. Additionally, doxycycline degradation was observed at three different stirring speeds (100, 300, and 500 rpm). The results confirmed the tribocatalytic effect, showing that DC degradation increases with higher stirring speeds. Using ZnO and ZnO/Ce powders, maximum degradations of 80% and 55%, respectively, were achieved in 24 h at a stirring speed of 500 rpm. The findings of this study suggest that these samples can effectively degrade contaminants in water through the application of mechanical energy. Full article
(This article belongs to the Special Issue Metal Catalyst Discovery, Design and Synthesis)
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17 pages, 3113 KiB  
Article
Compositional and Fabrication Cycle Optimization of Ceria-Zirconia-Supported Mo-Based Catalysts for NH3-SCR NOx Reduction
by Luca Spiridigliozzi, Viviana Monfreda, Serena Esposito, Olimpia Tammaro, Nicola Blangetti, Fabio Alessandro Deorsola and Gianfranco Dell’Agli
Inorganics 2024, 12(8), 217; https://doi.org/10.3390/inorganics12080217 - 10 Aug 2024
Viewed by 623
Abstract
The reduction of nitrogen oxides (NOx), critical pollutants from stationary to mobile sources, mainly relies on the selective catalytic reduction (NH3-SCR) method, employing ammonia to reduce NOx into nitrogen and water. However, conventional catalysts, while effective, pose both [...] Read more.
The reduction of nitrogen oxides (NOx), critical pollutants from stationary to mobile sources, mainly relies on the selective catalytic reduction (NH3-SCR) method, employing ammonia to reduce NOx into nitrogen and water. However, conventional catalysts, while effective, pose both environmental and operational challenges. This study investigates ceria-zirconia-supported molybdenum-based catalysts, exploring the effects of zirconium doping and different catalyst synthesis techniques, i.e., co-precipitation and impregnation. The catalytic performance of the differently prepared samples was significantly influenced by the molybdenum incorporation method and the zirconium content within the ceria-zirconia support. Co-precipitation at higher temperatures resulted in catalysts with better structural attributes but slightly lower catalytic activity compared to those prepared via impregnation. Optimal NOx reduction (close to 100%) was observed at a 15 mol% zirconium doping level when using the impregnation method. Full article
(This article belongs to the Special Issue Metal Catalyst Discovery, Design and Synthesis)
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