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Catalysts
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Metal-Support Interactions for Advanced Catalysis
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Metal-Support Interactions for Advanced Catalysis

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

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 16890

Special Issue Editors

Prof. Dr. Junling Lu

grade E-Mail Website
Guest Editor
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China
Interests: supported metal catalyst; single atom catalyst; structure-activity relationship; atomic layer deposition; selective hydrogenation reactions; methane activation; CO2 utilization
Prof. Dr. Qiang Fu

E-Mail Website
Guest Editor
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
Interests: surface science; heterogeneous catalysis; thin films; interface science
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Supported metal catalysts are an important category of heterogeneous catalysts and are widely applied in various industrial chemical reactions. Metal–support interactions play essential roles in the dispersion of metals with a high surface area and the stabilization of metal particles during catalysis. Such interactions could also have a substantial impact on the shape of the metal particles (e.g., two dimensional versus three dimensional ones), thus tuning catalytic performance remarkably. In the case of noble metals on reducible oxide, they could even cause migration of the oxide to the surface of metal particles after high-temperature reduction, which is called strong metal–support interaction (SMSI). Meanwhile, these interactions might also induce substantial electronic perturbations to metal particles. Such “electronic metal–support interactions” (EMSIs), rationalized in terms of charge transfer, were suggested to modulate the metal d-band centers, thus often leading to outstanding catalytic activity. Therefore, understanding metal–support interactions is essential for tuning the activity, selectivity and stability of oxide-supported metal catalysts.

This Special Issue is focused on, but not limited to, recent progress in characterization, understanding and application of metal–support interactions in heterogeneous catalysis.

Prof. Dr. Junling Lu
Prof. Dr. Qiang Fu
Guest Editors

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Keywords

  • Supported metal catalysts
  • Single-atom catalyst
  • Strong metal–support interactions
  • Electronic metal−support interactions
  • Metal–oxide interfaces
  • Particle size effect
  • Support effect
  • Charge transfer

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Published Papers (5 papers)

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Research

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10 pages, 2811 KiB  
Article
Preparation, Characterization, and Catalytic Properties of Pd-Graphene Quantum Dot Catalysts
by Jisoo Kim, Jeongah Lim, Ji Dang Kim, Myong Yong Choi, Sunwoo Lee and Hyun Chul Choi
Catalysts 2022, 12(6), 619; https://doi.org/10.3390/catal12060619 - 5 Jun 2022
Cited by 6 | Viewed by 3016
Abstract
In this study, Pd-graphene quantum dot (Pd-GQD) catalysts were prepared by depositing Pd nanoparticles onto functionalized GQD surfaces, and their morphology and elemental composition were characterized using transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The as-prepared Pd-GQD was subsequently employed as [...] Read more.
In this study, Pd-graphene quantum dot (Pd-GQD) catalysts were prepared by depositing Pd nanoparticles onto functionalized GQD surfaces, and their morphology and elemental composition were characterized using transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The as-prepared Pd-GQD was subsequently employed as a catalyst for the Heck and decarboxylative cross-coupling reactions and was found to exhibit higher catalytic activity than other reference systems. The expanded substrate scope of various substituted aryl iodides further proved that the GQD is an effective support for preparing new heterogeneous catalysts with improved catalytic performances. Full article
(This article belongs to the Special Issue Metal-Support Interactions for Advanced Catalysis)
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12 pages, 13043 KiB  
Article
Oxidation of Toluene by Ozone over Surface-Modified γ-Al2O3: Effect of Ag Addition
by Kandukuri Bhargavi, Debjyoti Ray, Piu Chawdhury, Sairam Malladi, Thatikonda Shashidhar and Challapalli Subrahmanyam
Catalysts 2022, 12(4), 421; https://doi.org/10.3390/catal12040421 - 8 Apr 2022
Cited by 6 | Viewed by 2500
Abstract
In this study, the ability of ozone to oxidise toluene present in low levels into CO and CO2 was studied. The catalytic ozonation of toluene was carried out in a micro-fixed bed reactor. The oxidation was done in two steps: toluene adsorption [...] Read more.
In this study, the ability of ozone to oxidise toluene present in low levels into CO and CO2 was studied. The catalytic ozonation of toluene was carried out in a micro-fixed bed reactor. The oxidation was done in two steps: toluene adsorption on the catalyst followed by sequential ozone desorption. Toluene breakdown by ozone at low temperature and atmospheric pressure was achieved using γ-Al2O3 supported transition metal oxides impregnated with a reduced noble metal. The catalyst Ag–CoOx/γ-Al2O3 efficiently oxidised and transformed toluene into products (52.4% COx yield). This catalyst has a high surface area, more acidic sites, and lattice oxygens for better toluene oxidation. The addition of Ag to the CoOx/γ-Al2O3 catalyst surface improved toluene adsorption on the catalyst surface, resulting in improved product yield, selectivity, and carbon balance. Full article
(This article belongs to the Special Issue Metal-Support Interactions for Advanced Catalysis)
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15 pages, 3990 KiB  
Article
The Roles of Precursor-Induced Metal–Support Interaction on the Selective Hydrogenation of Crotonaldehyde over Ir/TiO2 Catalysts
by Aiping Jia, Hantao Peng, Yunshang Zhang, Tongyang Song, Yanwen Ye, Mengfei Luo, Jiqing Lu and Weixin Huang
Catalysts 2021, 11(10), 1216; https://doi.org/10.3390/catal11101216 - 9 Oct 2021
Cited by 1 | Viewed by 2351
Abstract
Various supported Ir/TiO2 catalysts were prepared using different Ir precursors (i.e., H2IrCl6, (NH4)2IrCl6 and Ir(acac)3) and tested for vapor phase selective hydrogenation of crotonaldehyde. The choice of Ir precursor significantly altered [...] Read more.
Various supported Ir/TiO2 catalysts were prepared using different Ir precursors (i.e., H2IrCl6, (NH4)2IrCl6 and Ir(acac)3) and tested for vapor phase selective hydrogenation of crotonaldehyde. The choice of Ir precursor significantly altered the Ir-TiOx interaction in the catalyst, which thus had essential influences on the geometric and electronic properties of the Ir species, reducibility, and surface acidity, and, consequently, their reaction behaviors. The Ir/TiO2-N catalyst using (NH4)2IrCl6 as the precursor gave the highest initial reaction rates and turnover frequencies of crotyl alcohol formation. Such high performance was ascribed to the high Ir dispersion and high surface concentration of Ir0 species, as well as a higher surface acidity, in the Ir/TiO2-N catalyst compared to its counterparts, indicating the synergistic roles of the Ir-TiOx interface in the reaction, as the interfacial sites were responsible for the adsorption/activation of H2 and the C=O bond in the crotonaldehyde molecule. Full article
(This article belongs to the Special Issue Metal-Support Interactions for Advanced Catalysis)
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10 pages, 18328 KiB  
Article
Electron-Enriched Pd Nanoparticles for Selective Hydrogenation of Halonitrobenzenes to Haloanilines
by Zechen Liang, Mingkai Zhang, Sai Zhang and Yongquan Qu
Catalysts 2021, 11(5), 543; https://doi.org/10.3390/catal11050543 - 23 Apr 2021
Cited by 6 | Viewed by 2423
Abstract
Selective hydrogenation of halonitrobenzenes into haloanilines represents a green process to replace the environmentally unfriendly non-catalytic chemical reduction process in industry. However, this transformation often suffers from serious dehalogenation due to the easy break of carbon-halogen bonds on metal surfaces. Modulations of the [...] Read more.
Selective hydrogenation of halonitrobenzenes into haloanilines represents a green process to replace the environmentally unfriendly non-catalytic chemical reduction process in industry. However, this transformation often suffers from serious dehalogenation due to the easy break of carbon-halogen bonds on metal surfaces. Modulations of the electronic structure of the supported Pd nanoparticles on Lewis-basic layered double hydroxides have been demonstrated to promote catalytic activity and selectivity for hydrogenation of halonitrobenzenes into haloanilines. Mechanism studies suggest that Pd with the enhanced electron density not only improves the capability for hydrogen activation, but also generates the partially negative-charged hydrogen species to suppress the electrophilic attack on the carbon-halogen bond and avoid the dehalogenation. Full article
(This article belongs to the Special Issue Metal-Support Interactions for Advanced Catalysis)
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Review

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16 pages, 3623 KiB  
Review
Oxidative Strong Metal–Support Interactions
by Xiaorui Du, Hailian Tang and Botao Qiao
Catalysts 2021, 11(8), 896; https://doi.org/10.3390/catal11080896 - 25 Jul 2021
Cited by 21 | Viewed by 4664
Abstract
The discoveries and development of the oxidative strong metal–support interaction (OMSI) phenomena in recent years not only promote new and deeper understanding of strong metal–support interaction (SMSI) but also open an alternative way to develop supported heterogeneous catalysts with better performance. In this [...] Read more.
The discoveries and development of the oxidative strong metal–support interaction (OMSI) phenomena in recent years not only promote new and deeper understanding of strong metal–support interaction (SMSI) but also open an alternative way to develop supported heterogeneous catalysts with better performance. In this review, the brief history as well as the definition of OMSI and its difference from classical SMSI are described. The identification of OMSI and the corresponding characterization methods are expounded. Furthermore, the application of OMSI in enhancing catalyst performance, and the influence of OMSI in inspiring discoveries of new types of SMSI are discussed. Finally, a brief summary is presented and some prospects are proposed. Full article
(This article belongs to the Special Issue Metal-Support Interactions for Advanced Catalysis)
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