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Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts
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Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts

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

Deadline for manuscript submissions: 30 September 2024 | Viewed by 7650

Special Issue Editors

Prof. Dr. Chaoqiu Chen

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Guest Editor
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
Interests: heterogeneous catalysis; sub-nanocatalysis; atomic layer deposition; spin configuration; selective oxidation of methane
Prof. Dr. Xin Jin

E-Mail Website
Guest Editor
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
Interests: nanocatalysis for biomass and CO2 conversion to chemicals; industrial catalysis; reaction engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Xiao Chen

E-Mail Website
Guest Editor
State Key Laboratory of Fine Chemicals and Laboratory of Advanced Materials and Catalytic Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
Interests: heterogeneous catalysis; intermetallic compounds in catalysis; electrosynthesis industry
Special Issues, Collections and Topics in MDPI journals
Dr. Jinshu Tian

E-Mail Website
Guest Editor
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Interests: heterogenous catalysts; light alkane (C1–C3) dehydrogenation; CO2 utilization; in situ dynamic characterization; DFT simulation
Dr. Lihua Zhu

E-Mail Website
Guest Editor
College of Chemistry and Chemical Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China
Interests: heterogeneous catalysis; catalytic hydrogenation; electrocatalysis

Special Issue Information

Dear Colleagues,

Catalysis plays a critical role in many industrial processes, including the production of fuels, chemicals, and materials. Heterogeneous catalysis, in particular, is widely used in industry due to its high efficiency and low cost. In recent years, there has been a growing interest in developing more efficient and sustainable catalytic systems for industrial processes. This has led to the development of new types of catalysts, including nano- and cluster-catalysts and single-atom catalysts. These catalysts offer several advantages over traditional catalysts, such as higher activity and selectivity, improved stability, and lower metal usage.

The development of new catalysts has also led to the optimization of industrial catalytic processes. For example, the use of nano- and cluster catalysts has enabled the development of more efficient processes for producing chemicals and fuels. Single-atom catalysts have also shown promise in various industrial processes due to their high atom efficiency and unique electronic and geometric properties.

This Special Issue aims to explore the latest developments in heterogeneous catalysis, particularly in the context of nano- and cluster-catalysts and single-atom catalysts, as well as their applications in industrial catalytic processes. We hope this Special Issue will provide insights into the latest advances in heterogeneous catalysis and inspire new ideas for developing more efficient and sustainable catalytic systems for industrial processes.

Prof. Dr. Chaoqiu Chen
Prof. Dr. Xin Jin
Dr. Xiao Chen
Dr. Jinshu Tian
Dr. Lihua Zhu
Guest Editors

Manuscript Submission Information

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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

  • heterogeneous catalysis
  • spillover
  • metal-based catalysts
  • metal oxide-based catalysts

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Published Papers (6 papers)

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Research

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22 pages, 18969 KiB  
Article
Dilute Alloy Catalysts for the Synthesis of Isobutanol via the Guerbet Route: A Comprehensive Study
by Johannes Häusler, Joachim Pasel, Clemens Wöllhaf, Ralf Peters and Detlef Stolten
Catalysts 2024, 14(3), 215; https://doi.org/10.3390/catal14030215 - 21 Mar 2024
Viewed by 1063
Abstract
This study investigates the potential of bimetallic alloy catalysts, specifically Ni99Pt1, Cu99Ni1, Cu99Fe1, Fe99Pt1, and Fe99Pd1, for the synthesis of isobutanol via the [...] Read more.
This study investigates the potential of bimetallic alloy catalysts, specifically Ni99Pt1, Cu99Ni1, Cu99Fe1, Fe99Pt1, and Fe99Pd1, for the synthesis of isobutanol via the Guerbet route. The catalysts were synthesized with a doping of 1 at% Ni, Fe, Pt, and Pd in the base metals Fe, Cu, and Ni. The catalytic properties of these bimetallic alloy catalysts were explored for their potential for promoting the Guerbet reaction. The study aims to test the usability of the theoretically predicted d-band values in the synthesized bimetallic catalysts, which were prepared by means of incipient wetness impregnation, and shows that doping amounts smaller than 1 at% already significantly improved the catalytic activity of the base metals. In particular, the doping of nickel with platinum yielded an effective catalyst for the synthesis of isobutanol via the Guerbet pathway. The Ni99Pt1/C catalyst from the presented experiments had the highest Space Time Yield (STY) and is, therefore, also a promising catalyst for the hydrogen-borrowing reactions class. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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24 pages, 5671 KiB  
Article
Reduced Siderite Ore Combined with Magnesium Oxide as Support Material for Ni-Based Catalysts; An Experimental Study on CO2 Methanation
by Kamonrat Suksumrit, Christoph A. Hauzenberger, Srett Santitharangkun and Susanne Lux
Catalysts 2024, 14(3), 206; https://doi.org/10.3390/catal14030206 - 20 Mar 2024
Viewed by 1839
Abstract
Ni-based catalysts play a fundamental role in catalytic CO2 methanation. In this study, the possibility of using siderite ore as a catalyst or catalytic support material for nickel-based catalysts was investigated, aiming at the exploitation of an abundant natural resource. The catalytic [...] Read more.
Ni-based catalysts play a fundamental role in catalytic CO2 methanation. In this study, the possibility of using siderite ore as a catalyst or catalytic support material for nickel-based catalysts was investigated, aiming at the exploitation of an abundant natural resource. The catalytic performance of Ni-based catalysts with reduced siderite ore as a support was evaluated and compared to MgO as a support material. MgO is known as an effective support material, as it provides access to bifunctional catalysts because of its basicity and high CO2 adsorption capacity. It was shown that undoped and Ni-doped reduced siderite ore have comparable catalytic activity for CO2 hydrogenation (20−23%) at 648 K, but show limited selectivity toward methane (<20% for sideritereduced and 60.2% for Ni/sideritereduced). When MgO was added to the support material (Ni/sideritereduced/MgO), both the CO2 conversion and the selectivity toward methane increased significantly. CO2 conversions were close to the thermodynamic equilibrium, and methane selectivities of ≥99% were achieved. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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17 pages, 6194 KiB  
Article
Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts
by Dalsan Yoo, Munjeong Kim, Seung Kyo Oh, Seoyeon Hwang, Sohee Kim, Wooram Kim, Yoonja Kwon, Youngmin Jo and Jong-Ki Jeon
Catalysts 2024, 14(2), 116; https://doi.org/10.3390/catal14020116 - 31 Jan 2024
Viewed by 1594
Abstract
The objectives of this study were to prepare a high-purity hydroxylammonium nitrate (HAN) solution and evaluate the performance of various types of metal oxide/honeycomb catalysts during the catalytic decomposition of the HAN solution. Hydroxylammonium nitrate was prepared via a neutralization reaction of hydroxylamine [...] Read more.
The objectives of this study were to prepare a high-purity hydroxylammonium nitrate (HAN) solution and evaluate the performance of various types of metal oxide/honeycomb catalysts during the catalytic decomposition of the HAN solution. Hydroxylammonium nitrate was prepared via a neutralization reaction of hydroxylamine and nitric acid. FT-IR was used to analyze the chemical composition, chemical structure, and functional groups of the HAN. The aqueous HAN solution obtained from pH 7.06 showed the highest concentration of HAN of 60% and a density of 1.39 g/mL. The concentration of HAN solution that could be obtained when the solvent was evaporated to the maximum level could not exceed 80%. In this study, catalysts were prepared using a honeycomb structure made of cordierite (5SiO2-2MgO-2Al2O3) as a support, with Mn, Co, Cu, Pt, or Ir impregnated as active metals. The pore structure of the metal oxide/honeycomb catalysts did not significantly depend on the type of metal loaded. The Cu/honeycomb catalyst showed the strongest effect of lowering the decomposition onset temperature in the decomposition of the HAN solution likely due to the intrinsic activity of the Cu metal being superior to that of the other metals. It was confirmed that the effect of the catalyst on the decomposition mechanism of the aqueous HAN solution was negligible. Through a repetitive cycle of HAN decomposition, it was confirmed that the Cu/honeycomb catalyst could be recovered and reused as a catalyst for the decomposition of an aqueous HAN solution. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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15 pages, 4186 KiB  
Article
Uniformly Dispersed Nano Pd-Ni Oxide Supported on Polyporous CeO2 and Its Application in Methane Conversion of Tail Gas from Dual-Fuel Engine
by Chunlian Luo, Luwei Chen, Abdullah N. Alodhayb, Jianhua Wu, Mingwu Tan and Yanling Yang
Catalysts 2024, 14(1), 24; https://doi.org/10.3390/catal14010024 - 28 Dec 2023
Viewed by 1314
Abstract
The development of catalysts for low-temperature methane combustion is crucial in addressing the greenhouse effect. An effective industrial catalyst strategy involves optimizing noble metal utilization and boosting metal–metal interaction. Here, the PdNi-H catalyst was synthesized using the self-assembly method, achieving the high dispersion [...] Read more.
The development of catalysts for low-temperature methane combustion is crucial in addressing the greenhouse effect. An effective industrial catalyst strategy involves optimizing noble metal utilization and boosting metal–metal interaction. Here, the PdNi-H catalyst was synthesized using the self-assembly method, achieving the high dispersion and close proximity of Pd and Ni atoms compared to the counterparts prepared by the impregnation method, as confirmed by EDS mapping. The XRD and TEM results revealed Pd2+ and Ni2+ doping within the CeO2 lattice, causing distortions and forming Pd-O-Ce or Ni-O-Ce structures. These structures promoted oxygen vacancy formation in CeO2, and this was further confirmed by the Raman and XPS results. Consequently, the PdNi-H catalyst demonstrated an excellent redox ability and catalytic activity, achieving lower ignition and complete methane burning temperatures at 282 and 387 °C, respectively. The highly dispersed PdNi species played a pivotal role in activating methane for enhanced redox ability. Additionally, the narrow size distribution range contributed to more vacancies on the surface of CeO2, as confirmed by the XPS results, thereby facilitating the activation of gas phase oxygen to form oxygen species (O2−). This collaborative catalytic approach presents a promising strategy for developing efficient and stable methane combustion catalysts at low temperatures. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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Review

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25 pages, 3741 KiB  
Review
Exploring Intermetallic Compounds: Properties and Applications in Catalysis
by Zhiquan Hou, Mengwei Hua, Yuxi Liu, Jiguang Deng, Xin Zhou, Ying Feng, Yifan Li and Hongxing Dai
Catalysts 2024, 14(8), 538; https://doi.org/10.3390/catal14080538 - 18 Aug 2024
Viewed by 805
Abstract
Intermetallic compounds (IMCs) have attracted significant attention in recent years due to their unique properties and potential applications in various fields, particularly in catalysis. This review aims to provide an in-depth understanding of IMCs, including their synthesis methods, structural characteristics, and diverse catalytic [...] Read more.
Intermetallic compounds (IMCs) have attracted significant attention in recent years due to their unique properties and potential applications in various fields, particularly in catalysis. This review aims to provide an in-depth understanding of IMCs, including their synthesis methods, structural characteristics, and diverse catalytic applications. The review begins with an introduction to IMCs, highlighting their distinct features and advantages over traditional catalyst materials. It then delves into the synthesis techniques employed to prepare IMCs and explores their structural properties. Subsequently, catalytic applications of the IMCs are introduced, focusing on the key reactions and highlighting their superior catalytic performance compared to conventional catalysts. Future perspectives for, and challenges to, the catalysis of IMCs are then proposed. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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18 pages, 3108 KiB  
Review
The Advancement of Supported Bimetallic Catalysts for the Elimination of Chlorinated Volatile Organic Compounds
by Hongxia Lin, Yuxi Liu, Jiguang Deng, Lin Jing, Zhiwei Wang, Lu Wei, Zhen Wei, Zhiquan Hou, Jinxiong Tao and Hongxing Dai
Catalysts 2024, 14(8), 531; https://doi.org/10.3390/catal14080531 - 16 Aug 2024
Viewed by 492
Abstract
Chlorinated volatile organic compounds (CVOCs) are persistent pollutants and harmful to the atmosphere, environment, and human health. The catalytic elimination of CVOCs has become a hotspot of interest due to their self-toxicity, the secondary generation of chlorinated by-products, and the Cl poisoning of [...] Read more.
Chlorinated volatile organic compounds (CVOCs) are persistent pollutants and harmful to the atmosphere, environment, and human health. The catalytic elimination of CVOCs has become a hotspot of interest due to their self-toxicity, the secondary generation of chlorinated by-products, and the Cl poisoning of catalysts. The development of high-performance, highly selective, and anti-poisoning catalysts is a critical issue. Bimetallic catalysts exhibit an improved dechlorination performance, poisoning resistance, and product selectivity through the modulation of geometrical and electronic structures. The present review article gives a brief overview of the recent advancements in the preparation of bimetallic catalysts and their catalytic CVOC elimination activities. In addition, representative case studies are provided to investigate the physicochemical properties, CVOC conversion, COx and inorganic chlorine species selectivities, and by-product control so that the structure–performance relationships of bimetallic catalysts can be established. Furthermore, this review article provides a fundamental understanding of designing bimetallic catalysts with specific active components and the desired physicochemical properties for target reactions. In the end, related perspectives for future work are proposed. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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