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Catalysts
Special Issues
New Insights into Heterogeneous Catalysis
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New Insights into Heterogeneous Catalysis

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: closed (15 August 2020) | Viewed by 9333

Special Issue Editors

Prof. Dr. Gianguido Ramis

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Guest Editor
Dipartimento di Ingegneria Chimica, Civile ed Ambientale, Università degli Studi di Genova and INSTM Unit Genova, Via all'Opera Pia 15A, 16145 Genova, Italy
Interests: heterogeneous catalytic processes; characterization of surface active sites; SCR of NOx with NH3; catalytic oxidation; catalytic combustion of hydrocarbons and VOCs; C-H bonds activation; H2 production by steam reforming of bio-alcohols; CO2 photoreduction; photocatalytic H2 production
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ilenia Rossetti

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Guest Editor
Dip. Chimica, Università degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy
Interests: photocatalysis; heterogeneous catalysis; process design; valorization of renewable raw materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Heterogeneous catalysis is the basis of more than 90% of industrial chemical processes, and it played an important role in the development of modern chemistry in the last century. A new golden age has recently begun, thanks to its fundamental role in the development of sustainable and green chemistry. Furthermore, advanced characterization tools have allowed boosting the fundamental understanding of catalytic functions.

This Special Issue aims to collect either original research articles or reviews on new aspects and approaches in heterogeneous catalysis. Every target reaction can be of interest, provided that a clear evidence of new methodologies and concepts is presented. The attention should focus preferentially on process development, i.e., contributions on catalytic process design, scale-up issues (including catalysts forming and deactivation/regeneration problems), kinetics, catalytic reactors design and modeling, and economic sustainability, are particularly welcome.

We hope that you will contribute to this issue sharing your valuable expertise.

Prof. Gianguido Ramis
Prof. Ilenia Rossetti
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 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

  • heterogeneous catalysis
  • catalytic processes
  • catalytic reactors
  • catalysts design
  • catalysts deactivation/regeneration
  • industrial catalytic processes
  • kinetics
  • scale-up of catalytic processes
  • economics of catalytic processes

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Published Papers (2 papers)

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Research

17 pages, 3621 KiB  
Article
Mechanistic Study of Silane Alcoholysis Reactions with Self-Assembled Monolayer-Functionalized Gold Nanoparticle Catalysts
by Katsuhiro Isozaki, Tomoya Taguchi, Kosuke Ishibashi, Takafumi Shimoaka, Wataru Kurashige, Yuichi Negishi, Takeshi Hasegawa, Masaharu Nakamura and Kazushi Miki
Catalysts 2020, 10(8), 908; https://doi.org/10.3390/catal10080908 - 9 Aug 2020
Cited by 4 | Viewed by 4718
Abstract
The self-assembled monolayer (SAM)-modified metallic nanoparticles (MNPs) often exhibit improved chemoselectivity in various catalytic reactions by controlling the reactants’ orientations adsorbed in the SAM; however, there have been a few examples showing that the reaction rate, i.e., catalytic activity, is enhanced by the [...] Read more.
The self-assembled monolayer (SAM)-modified metallic nanoparticles (MNPs) often exhibit improved chemoselectivity in various catalytic reactions by controlling the reactants’ orientations adsorbed in the SAM; however, there have been a few examples showing that the reaction rate, i.e., catalytic activity, is enhanced by the SAM-modification of MNP catalysts. The critical parameters that affect the catalytic activity, such as the supports, nanoparticle size, and molecular structures of the SAM components, remain uninvestigated in these sporadic literature precedents. Here, we report the mechanistic investigation on the effects of those parameters on the catalytic activity of alkanethiolate SAM-functionalized gold nanoparticles (AuNPs) toward silane alcoholysis reactions. The evaluation of the catalytic reaction over two-dimensionally arrayed dodecanethiolate SAM-functionalized AuNPs with different supports revealed the electronic interactions between AuNPs and the supports contributing to the rate enhancement. Additionally, an unprecedented size effect appeared—the AuNP with a 20 nm radius showed higher catalytic activity than those at 10 and 40 nm. Infrared reflection–absorption spectroscopy revealed that the conformational change of alkyl chains of the SAM affects the entrapment of reactants and products inside the SAM, and therefore brings about the acceleration effect. These findings provide a guideline for further applying the SAM-functionalization technique to stereoselective organic transformations with designer MNP catalysts. Full article
(This article belongs to the Special Issue New Insights into Heterogeneous Catalysis)
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20 pages, 4959 KiB  
Article
Photoreforming of Glucose over CuO/TiO2
by Elnaz Bahadori, Gianguido Ramis, Danny Zanardo, Federica Menegazzo, Michela Signoretto, Delia Gazzoli, Daniela Pietrogiacomi, Alessandro Di Michele and Ilenia Rossetti
Catalysts 2020, 10(5), 477; https://doi.org/10.3390/catal10050477 - 27 Apr 2020
Cited by 27 | Viewed by 3830
Abstract
Hydrogen production has been investigated through the photoreforming of glucose, as model molecule representative for biomass hydrolysis. Different copper- or nickel-loaded titania photocatalysts have been compared. The samples were prepared starting from three titania samples, prepared by precipitation and characterized by pure Anatase [...] Read more.
Hydrogen production has been investigated through the photoreforming of glucose, as model molecule representative for biomass hydrolysis. Different copper- or nickel-loaded titania photocatalysts have been compared. The samples were prepared starting from three titania samples, prepared by precipitation and characterized by pure Anatase with high surface area, or prepared through flame synthesis, i.e., flame pyrolysis and the commercial P25, leading to mixed Rutile and Anatase phases with lower surface area. The metal was added in different loading up to 1 wt % following three procedures that induced different dispersion and reducibility to the catalyst. The highest activity among the bare semiconductors was exhibited by the commercial P25 titania, while the addition of 1 wt % CuO through precipitation with complexes led to the best hydrogen productivity, i.e., 9.7 mol H2/h kgcat. Finally, a basic economic analysis considering only the costs of the catalyst and testing was performed, suggesting CuO promoted samples as promising and almost feasible for this application. Full article
(This article belongs to the Special Issue New Insights into Heterogeneous Catalysis)
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