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The 15th Anniversary of Materials—Recent Advances in Catalytic Materials

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: 10 August 2024 | Viewed by 4773

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Special Issue Editor

Prof. Dr. Steven L. Suib

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Guest Editor

Unit 3060, Department of Chemistry, University of Connecticut, 55 N. Eagleville Rd., Storrs, CT 06269-3060, USA
Interests: manganese oxides; catalysis; ceramics; nanotech; microwaves

Special Issue Information

Dear Colleagues,

Launched in 2008, Materials has provided readers with high-quality content edited by active researchers in material science for 15 years, through sustainable open access and outstanding editorial service. Today, the published papers receive more than 1,500,000 views per month, with readers in more than 150 countries and regions.

The 15^th Anniversary of Materials will be celebrated with a Special Issue entitled “Recent Advances in Catalytic Materials”. Papers in any area of catalysis will be considered in this Special Issue. Both homogeneous and heterogeneous catalysis papers are welcome. Manuscripts concerning synthesis, characterization, and applications of catalysts are of interest. Both experimental and computational modeling studies will be included.

Prof. Dr. Steven L. Suib
Guest Editor

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. Materials is an international peer-reviewed open access semimonthly 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 2600 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
homogeneous catalysis
characterization
computational modeling

Published Papers (5 papers)

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Research

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14 pages, 2906 KiB

Open AccessArticle

First-Principles Study of Adsorption of CH₄ on a Fluorinated Model NiF₂ Surface

by Tilen Lindič and Beate Paulus

Materials 2024, 17(9), 2062; https://doi.org/10.3390/ma17092062 - 27 Apr 2024

Viewed by 286

Abstract

Electrochemical fluorination on nickel anodes, also known as the Simons’ process, is an important fluorination method used on an industrial scale. Despite its success, the mechanism is still under debate. One of the proposed mechanisms involves higher valent nickel species formed on an anode acting as effective fluorinating agents. Here we report the first attempt to study fluorination by means of first principles investigation. We have identified a possible surface model from the simplest binary nickel fluoride (NiF₂). A twice oxidized NiF₂(F₂) (001) surface exhibits higher valent nickel centers and a fluorination source that can be best characterized as an [F₂]⁻ like unit, readily available to aid fluorination. We have studied the adsorption of CH₄ and the co-adsorption of CH₄ and HF on this surface by means of periodic density functional theory. By the adsorption of CH₄, we found two main outcomes on the surface. Unreactive physisorption of CH₄ and dissociative chemisorption resulting in the formation of CH₃F and HF. The co-adsorption with the HF gave rise to four main outcomes, namely the formation of CH₃F, CH₂F₂, CH₃ radical, and also physisorbed CH₄. Full article

(This article belongs to the Special Issue The 15th Anniversary of Materials—Recent Advances in Catalytic Materials)

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12 pages, 3570 KiB

Open AccessArticle

Synthesis and Catalytic Performance of High-Entropy Rare-Earth Perovskite Nanofibers: (Y_0.2La_0.2Nd_0.2Gd_0.2Sm_0.2)CoO₃ in Low-Temperature Carbon Monoxide Oxidation

by Paweł A. Krawczyk, Jan Wyrwa and Władysław W. Kubiak

Materials 2024, 17(8), 1883; https://doi.org/10.3390/ma17081883 - 19 Apr 2024

Viewed by 448

Abstract

This study investigated the catalytic properties of low-temperature oxidation of carbon monoxide, focusing on (Y_0.2La_0.2Nd_0.2Gd_0.2Sm_0.2)CoO₃ synthesized via a glycothermal method using 1,4-butanediol and diethylene glycol at 250 °C. This synthesis route bypasses the energy-intensive sintering process at 1200 °C while maintaining a high-entropy single-phase structure. The synthesized material was characterized structurally and chemically by X-ray diffraction and SEM/EDX analyses. The material was shown to form nanofibers of (Y_0.2La_0.2Nd_0.2Gd_0.2Sm_0.2)CoO₃, thereby increasing the active surface area for catalytic reactions, and crystallize in the model Pbnm space group of distorted perovskite cell. Using a custom setup to investigate catalytic properties of (Y_0.2La_0.2Nd_0.2Gd_0.2Sm_0.2)CoO₃, the CO oxidation behavior of those high-entropy perovskite oxide was investigated, showing an overall conversion of 78% at 50 °C and 97% at 100 °C. These findings highlight the effective catalytic activity of nanofibers of (Y_0.2La_0.2Nd_0.2Gd_0.2Sm_0.2)CoO₃ under mild conditions and their versatility in various catalytic processes of robust CO neutralization. The incorporation of rare-earth elements into a high-entropy structure could impart unique catalytic properties, promoting a synergistic effect that enhances performance. Full article

(This article belongs to the Special Issue The 15th Anniversary of Materials—Recent Advances in Catalytic Materials)

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Graphical abstract

15 pages, 2726 KiB

Open AccessArticle

Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

by Ngo Thi Tuong Vy, Dang Nguyen Nha Khanh, Nguyen Ngoc Nghia, Le Hai Khoa, Pham Tuan Nhi, Le Xuan Hung, Doan Thi Minh Phuong and Nguyen Thi Kim Phuong

Materials 2023, 16(14), 5027; https://doi.org/10.3390/ma16145027 - 16 Jul 2023

Cited by 3 | Viewed by 820

Abstract

A superior heterojunction of HC-ZnBi-LDO was synthesized in two steps, namely hydrothermal carbonization, followed by co-precipitation. The 2% HC-ZnBi-LDO heterojunction photocatalysts could degrade over 90.8% of 30 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) using 1.0 g/L of the catalyst after 135 min of visible light exposure at pH 4. The activity of 2% HC-ZnO-LDO was remarkably stable. Approximately 86.4–90.8% of 30 mg/L 2,4-D was degraded, and more than 79–86.4% of TOC was mineralized by 2% HC-ZnBi-LDO at pH 4 after 135 min of visible light exposure during four consecutive cycles. The rapid separation and migration of charge carriers at the interfaces between HC and ZnBi-LDO were achieved within 2% HC-ZnBi-LDO. Moreover, the electron acceptor characteristic of HC in 2% HC-ZnBi-LDO caused the recombination of charge carriers to decrease significantly, thus generating more reactive radicals, such as hydroxyl radicals (OH^●) and superoxide radicals (O₂^●−). These results demonstrate that the novel 2% HC-ZnBi-LDO is a superior photocatalyst for the remediation of hazardous organic pollutants. Full article

(This article belongs to the Special Issue The 15th Anniversary of Materials—Recent Advances in Catalytic Materials)

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14 pages, 8553 KiB

Open AccessArticle

The Relationship between the Structural Characteristics of α-Fe₂O₃ Catalysts and Their Lattice Oxygen Reactivity Regarding Hydrogen

by Nadezhda Kirik, Alexander Krylov, Andrey Boronin, Sergey Koshcheev, Leonid Solovyov, Evgenii Rabchevskii, Nina Shishkina and Alexander Anshits

Materials 2023, 16(12), 4466; https://doi.org/10.3390/ma16124466 - 19 Jun 2023

Cited by 2 | Viewed by 992

Abstract

In this paper, the relationship between the structural features of hematite samples calcined in the interval of 800–1100 °C and their reactivity regarding hydrogen studied in the temperature-programmed reaction (TPR-H₂) was studied. The oxygen reactivity of the samples decreases with the increasing calcination temperature. The study of calcined hematite samples used X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), and Raman spectroscopy, and their textural characteristics were studied also. According to XRD results, hematite samples calcined in the temperature range under study are monophase, represented by the α-Fe₂O₃ phase, in which crystal density increases with increasing calcination temperature. The Raman spectroscopy results also register only the α-Fe₂O₃ phase; the samples consist of large, well-crystallized particles with smaller particles on their surface, having a significantly lower degree of crystallinity, and their proportion decreases with increasing calcination temperature. XPS results show the α-Fe₂O₃ surface enriched with Fe²⁺ ions, whose proportion increases with increasing calcination temperature, which leads to an increase in the lattice oxygen binding energy and a decrease in the α-Fe₂O₃ reactivity regarding hydrogen. Full article

(This article belongs to the Special Issue The 15th Anniversary of Materials—Recent Advances in Catalytic Materials)

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Review

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36 pages, 6951 KiB

Open AccessReview

Heterogeneous Catalysts in N-Heterocycles and Aromatics as Liquid Organic Hydrogen Carriers (LOHCs): History, Present Status and Future

by Jinxu Zhang, Fusheng Yang, Bin Wang, Dong Li, Min Wei, Tao Fang and Zaoxiao Zhang

Materials 2023, 16(10), 3735; https://doi.org/10.3390/ma16103735 - 15 May 2023

Cited by 2 | Viewed by 1592

Abstract

The continuous decline of traditional fossil energy has cast the shadow of an energy crisis on human society. Hydrogen generated from renewable energy sources is considered as a promising energy carrier, which can effectively promote the energy transformation of traditional high-carbon fossil energy to low-carbon clean energy. Hydrogen storage technology plays a key role in realizing the application of hydrogen energy and liquid organic hydrogen carrier technology, with many advantages such as storing hydrogen efficiently and reversibly. High-performance and low-cost catalysts are the key to the large-scale application of liquid organic hydrogen carrier technology. In the past few decades, the catalyst field of organic liquid hydrogen carriers has continued to develop and has achieved some breakthroughs. In this review, we summarized recent significant progress in this field and discussed the optimization strategies of catalyst performance, including the properties of support and active metals, metal–support interaction and the combination and proportion of multi-metals. Moreover, the catalytic mechanism and future development direction were also discussed. Full article

(This article belongs to the Special Issue The 15th Anniversary of Materials—Recent Advances in Catalytic Materials)

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