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Catalysts
Special Issues
Transition Metal Catalysis for Biomass Transformation and Green Energy Production
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Transition Metal Catalysis for Biomass Transformation and Green Energy Production

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

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 8366

Special Issue Editors

Dr. Sofia Capelli

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Guest Editor
Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milan, Italy
Interests: heterogeneous catalysis; catalyst synthesis; catalyst characterization; green chemistry; batch and continuous reactions
Dr. Stefano Cattaneo

E-Mail Website
Guest Editor
Department of Chemistry, Università degli Studi di Milano, Via Golgi, 19-20133 Milano, Italy
Interests: synthesis and characterization of heterogeneous catalysts and their application in the conversion of biomass-derived products
Dr. Sebastiano Campisi

E-Mail Website
Guest Editor
Department of Chemistry, Università degli Studi di Milano, Milano, Italy
Interests: heterogenous catalysis; interfaces and surfaces; material characterization; circular economy; physical chemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are facing changes in catalysis due to the lack of noble metals. This important issue is driving researchers to move towards alternative non-noble metals able to give comparable or even better catalytic results. Among all the available metals, transition metals (TM) exhibit excellent catalytic performances in both homogeneous and heterogeneous catalytic reactions. The multiple and switchable oxidation states and the capability to form complexes are just two of the promising features behind the successful application of TM in a wide range of catalytic processes, from biomass valorization to energy production. Moreover, due to the redox properties, TM are suitable electrocatalysts both for oxidation and reduction reactions. On the other hand, one of the main limitations of TM-based catalysts is their low stability and deactivation.

This Special Issue of Catalysts focused on “Transition Metal Catalysis for Biomass Transformation and Green Energy Production” will focus on monometallic and bimetallic systems involved in the synthesis of chemicals from biomass and green energy production. Full papers, communications, reviews, and concepts in any topic related to the application of transition metal catalysis in these topics are more than welcome. Research papers focusing on the deactivation mechanism will be highly appreciated as well.

Dr. Sofia Capelli
Dr. Stefano Cattaneo
Dr. Sebastiano Campisi
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

  • Transition metal
  • Heterogeneous catalysis
  • Electrocatalysis
  • Biomass valorization
  • Energy production
  • Deactivation processes

Published Papers (3 papers)

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Research

23 pages, 10955 KiB  
Article
Influence of Cs Promoter on Ethanol Steam-Reforming Selectivity of Pt/m-ZrO2 Catalysts at Low Temperature
by Zahra Rajabi, Li Jones, Michela Martinelli, Dali Qian, Donald C. Cronauer, A. Jeremy Kropf, Caleb D. Watson and Gary Jacobs
Catalysts 2021, 11(9), 1104; https://doi.org/10.3390/catal11091104 - 14 Sep 2021
Cited by 7 | Viewed by 1884
Abstract
The decarboxylation pathway in ethanol steam reforming ultimately favors higher selectivity to hydrogen over the decarbonylation mechanism. The addition of an optimized amount of Cs to Pt/m-ZrO2 catalysts increases the basicity and promotes the decarboxylation route, converting ethanol to mainly H2 [...] Read more.
The decarboxylation pathway in ethanol steam reforming ultimately favors higher selectivity to hydrogen over the decarbonylation mechanism. The addition of an optimized amount of Cs to Pt/m-ZrO2 catalysts increases the basicity and promotes the decarboxylation route, converting ethanol to mainly H2, CO2, and CH4 at low temperature with virtually no decarbonylation being detected. This offers the potential to feed the product stream into a conventional methane steam reformer for the production of hydrogen with higher selectivity. DRIFTS and the temperature-programmed reaction of ethanol steam reforming, as well as fixed bed catalyst testing, revealed that the addition of just 2.9% Cs was able to stave off decarbonylation almost completely by attenuating the metallic function. This occurs with a decrease in ethanol conversion of just 16% relative to the undoped catalyst. In comparison with our previous work with Na, this amount is—on an equivalent atomic basis—just 28% of the amount of Na that is required to achieve the same effect. Thus, Cs is a much more efficient promoter than Na in facilitating decarboxylation. Full article
(This article belongs to the Special Issue Transition Metal Catalysis for Biomass Transformation and Green Energy Production)
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19 pages, 4036 KiB  
Article
Decomposition of Additive-Free Formic Acid Using a Pd/C Catalyst in Flow: Experimental and CFD Modelling Studies
by Sanaa Hafeez, Felipe Sanchez, Sultan M. Al-Salem, Alberto Villa, George Manos, Nikolaos Dimitratos and Achilleas Constantinou
Catalysts 2021, 11(3), 341; https://doi.org/10.3390/catal11030341 - 07 Mar 2021
Cited by 17 | Viewed by 2867
Abstract
The use of hydrogen as a renewable fuel has gained increasing attention in recent years due to its abundance and efficiency. The decomposition of formic acid for hydrogen production under mild conditions of 30 °C has been investigated using a 5 wt.% Pd/C [...] Read more.
The use of hydrogen as a renewable fuel has gained increasing attention in recent years due to its abundance and efficiency. The decomposition of formic acid for hydrogen production under mild conditions of 30 °C has been investigated using a 5 wt.% Pd/C catalyst and a fixed bed microreactor. Furthermore, a comprehensive heterogeneous computational fluid dynamic (CFD) model has been developed to validate the experimental data. The results showed a very good agreement between the CFD studies and experimental work. Catalyst reusability studies have shown that after 10 reactivation processes, the activity of the catalyst can be restored to offer the same level of activity as the fresh sample of the catalyst. The CFD model was able to simulate the catalyst deactivation based on the production of the poisoning species CO, and a sound validation was obtained with the experimental data. Further studies demonstrated that the conversion of formic acid enhances with increasing temperature and decreasing liquid flow rate. Moreover, the CFD model established that the reaction system was devoid of any internal and external mass transfer limitations. The model developed can be used to successfully predict the decomposition of formic acid in microreactors for potential fuel cell applications. Full article
(This article belongs to the Special Issue Transition Metal Catalysis for Biomass Transformation and Green Energy Production)
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10 pages, 2444 KiB  
Article
Dehydrogenation of Formic Acid to CO2 and H2 by Manganese(I)–Complex: Theoretical Insights for Green and Sustainable Route
by Tiziana Marino and Mario Prejanò
Catalysts 2021, 11(1), 141; https://doi.org/10.3390/catal11010141 - 19 Jan 2021
Cited by 4 | Viewed by 2728
Abstract
In this work, a detailed computational study on a recently synthetized Mn(I)-dependent complex [(tBuPNNOP)Mn(CO)2]+ is reported. This species promotes the dehydrogenation of formic acid to carbon dioxide and hydrogen. The here proposed catalytic cycle proceeds through the formation [...] Read more.
In this work, a detailed computational study on a recently synthetized Mn(I)-dependent complex [(tBuPNNOP)Mn(CO)2]+ is reported. This species promotes the dehydrogenation of formic acid to carbon dioxide and hydrogen. The here proposed catalytic cycle proceeds through the formation of stabilized adduct between [(tBuPNNOPtBu)Mn(CO)2]+ and formate and the progressive release of CO2 and H2, mediated by the presence of trimethylamine. In order to evaluate the influence of the environment on the catalytic activity, different solvents have been taken into account. The computed barriers and the geometrical parameters account well for the available experimental data, confirming the robustness of the complex and reproducing its good catalytic performance. Outcomes from the present investigation can stimulate further experimental works in the design of new more efficient catalysts devoted to H2 production. Full article
(This article belongs to the Special Issue Transition Metal Catalysis for Biomass Transformation and Green Energy Production)
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