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Catalysts
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Layered Double Hydroxide-Based Catalysts for Advanced Chemical Technologies
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Layered Double Hydroxide-Based Catalysts for Advanced Chemical Technologies

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

Deadline for manuscript submissions: 15 June 2024 | Viewed by 3747

Special Issue Editors

Prof. Dr. Ioan-Cezar Marcu

E-Mail Website
Guest Editor
Research Center for Catalysts and Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
Interests: heterogeneous catalysis; catalysis by metal oxides; semiconducting metal oxides; layered double hydroxides; catalytic oxidation
Special Issues, Collections and Topics in MDPI journals
Dr. Octavian Dumitru Pavel

E-Mail Website
Guest Editor
Research Center for Catalysts and Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
Interests: heterogeneous catalysis; preparation and modification of LDH-type catalysts; mechanochemistry; LDH characterization; catalytic processes; fine chemical synthesis; selective oxidation reactions
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

After the first successful special issue focused on layered double hydroxide-based catalytic materials available here, we propose the second edition titled “Layered Double Hydroxide-Based Catalysts for Advanced Chemical Technologies”. Layered double hydroxides (LDH) together with their derived materials, such as hybrids, nanocomposites, mixed metal oxides, and supported metals, were shown to be excellent heterogeneous catalysts for a wide range of chemical, photochemical and electrochemical processes. However, they have not had their last word yet! Indeed, due to their great compositional flexibility and ability to intercalate between their nanosheets both organic and inorganic species, new multifunctional catalytic materials can be obtained with practically unlimited applications in various processes resulting in new chemical technologies or the improvement of the existing ones. Thus, the present Special Issue collects original research papers, reviews, and commentaries focused on new and outstanding catalytic applications of all kinds of LDH-based materials.

Prof. Dr. Ioan-Cezar Marcu
Dr. Octavian Dumitru Pavel
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

  • layered double hydroxides
  • LDH-based hierarchically structured catalysts
  • LDH-supported catalysts
  • LDH-derived mixed metal oxides
  • sustainable chemical technologies
  • fine chemical synthesis
  • environmental catalytic technologies
  • catalytic valorization of biomass

Related Special Issue

Published Papers (3 papers)

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Research

18 pages, 2862 KiB  
Article
Total Catalytic Oxidation of Ethanol over MnCoAl Mixed Oxides Derived from Layered Double Hydroxides: Effect of the Metal Ratio and the Synthesis Atmosphere Conditions
by Mariebelle Tannous, Charf Eddine Bounoukta, Stéphane Siffert, Christophe Poupin and Renaud Cousin
Catalysts 2023, 13(9), 1316; https://doi.org/10.3390/catal13091316 - 21 Sep 2023
Viewed by 1099
Abstract
In this work, the LDH approach was used to prepare MnCoAl mixed oxides with various textural and structural frameworks for the purpose of enhancing the total oxidation of ethanol. Our results showed that the catalytic activity of the MnCoAl oxides was influenced by [...] Read more.
In this work, the LDH approach was used to prepare MnCoAl mixed oxides with various textural and structural frameworks for the purpose of enhancing the total oxidation of ethanol. Our results showed that the catalytic activity of the MnCoAl oxides was influenced by the Mn/Co ratio and the gas atmosphere used during synthesis and thermal treatment. Rietveld refinement was processed to estimate the proportion of phases presented in the prepared materials. Our findings indicated that the generation of Mn2CoO4 spinel and Mn5O8 lamellar phases improved the redox properties and enhanced the active sites in the MnCoAl oxides. Notably, we observed that the catalytic activity at low temperatures of the catalyst increased with the decrease in the cobalt amount. It was also demonstrated that using an N2 atmosphere during the preparation of the materials is a promising route to prevent the formation of undesirable phases in the LDHs and their corresponding oxides. The presence of an O2-free atmosphere during the LDH synthesis positively affects the total ethanol transformation to CO2 over the oxide catalysts. Full article
(This article belongs to the Special Issue Layered Double Hydroxide-Based Catalysts for Advanced Chemical Technologies)
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13 pages, 5375 KiB  
Article
RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases
by Zhihui Li, Xinyuan Zhao, Jiteng Ma and Xinfa Dong
Catalysts 2023, 13(9), 1245; https://doi.org/10.3390/catal13091245 - 27 Aug 2023
Viewed by 740
Abstract
CO selective methanation (CO-SMET) is a promising method for deep CO removal from H2-rich gases. In this study, a series of RuNi/MMO catalysts are prepared using the support MMO-N derived from NiAl-NO3-LDHs, which was prepared from NiAl-CO3-LDHs [...] Read more.
CO selective methanation (CO-SMET) is a promising method for deep CO removal from H2-rich gases. In this study, a series of RuNi/MMO catalysts are prepared using the support MMO-N derived from NiAl-NO3-LDHs, which was prepared from NiAl-CO3-LDHs via an acid–alcohol ion-exchange reaction. The prepared catalysts were characterized by XRD, SEM, TEM, XPS, H2-TPR, CO-TPD, CO2-TPD, NH3-TPD, and TG. The RuNi/MMO-N catalyst demonstrated excellent CO-SMET performance, successfully reducing the CO to less than 10 ppm with a selectivity greater than 50% in a reaction temperature window ranging from 180 °C to 260 °C. Compared with similar catalysts derived from NiAl-CO3-LDHs, the exceptional CO-SMET capability of the RuNi/MMO-N catalyst is suggested to be associated with a more effective hydrogen spillover, a larger number of electron-rich Ni sites, and a higher density of acid sites on the surface of RuNi/MMO-N, which are conducive to CO adsorption and the inhibition of CO2 methanation. Full article
(This article belongs to the Special Issue Layered Double Hydroxide-Based Catalysts for Advanced Chemical Technologies)
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13 pages, 3559 KiB  
Article
Hierarchical Design of Homologous NiCoP/NF from Layered Double Hydroxides as a Long-Term Stable Electrocatalyst for Hydrogen Evolution
by Shenglu Song, Ailing Song, Lei Bai, Manman Duanmu, Lixin Wang, Haifeng Dong, Xiujuan Qin and Guangjie Shao
Catalysts 2023, 13(9), 1232; https://doi.org/10.3390/catal13091232 - 23 Aug 2023
Cited by 1 | Viewed by 1155
Abstract
Ternary transition metal phosphides (TTMPs) with two-dimensional heterointerface and adjustable electronic structures have been widely studied in hydrogen evolution reactions (HER). However, single-phase TMPs often have inappropriate H* adsorption energy and electronic transfer efficiency in HER. Herein, we utilized the heterogeneity in the [...] Read more.
Ternary transition metal phosphides (TTMPs) with two-dimensional heterointerface and adjustable electronic structures have been widely studied in hydrogen evolution reactions (HER). However, single-phase TMPs often have inappropriate H* adsorption energy and electronic transfer efficiency in HER. Herein, we utilized the heterogeneity in the crystal structure to design an efficient and stable catalyst from the NiCoP nanowire@NiCoP nanosheet on nickel foam (NW-NiCoP@NS-NiCoP/NF) for HER. Layered double hydroxides (LDHs) with a heterogeneous matrix on crystal surfaces were grown under different reaction conditions, and non-metallic P was introduced by anion exchange to adjust the electronic structure of the transition metals. The hierarchical structure of homologous NiCoP/NF from the LDH allows for a larger surface area, which results in more active sites and improved gas diffusion. The optimized NW-NiCoP@NS-NiCoP/NF electrode exhibits excellent HER activity, with an overpotential of 144 mV, a Tafel slope of 84.2 mV dec−1 at a current density of 100 mA cm−2 and remarkable stability for more than 500 h in 1.0 M KOH electrolyte. This work provides ideas for elucidating the rational design of structural heterogeneity as an efficient electrocatalyst and the in situ construction of hierarchical structures. Full article
(This article belongs to the Special Issue Layered Double Hydroxide-Based Catalysts for Advanced Chemical Technologies)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Oxide catalysts prepared by LDH way for the treatment of pollutants issued from wood combustion
Authors: Renaud Cousin
Affiliation: Unité de Chimie Environmentale et Interactions sur le Vivant (UCEIV EA 4492), 145 Avenue Maurice Schumann, Dunkerque, France

Title: highly stable FeCo LDH electrocatalyst for hydrogen evolution reaction.
Authors: Shengke Tang, Ding Li, Xiang Wu
Affiliation: Shenyang University of Technology.

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