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Catalysts
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Metal Nanoparticle Catalysis
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Metal Nanoparticle Catalysis

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

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 19096

Special Issue Editors

Dr. Luis M. Martínez-Prieto

E-Mail Website
Guest Editor
Instituto de Tecnología Química (ITQ); Universitat Politècnica de València (UPV); Av. de los Naranjos S/N, Puerta L, Edificio 6C, 46022 Valencia, Spain
Interests: metal nanoparticles; catalysis; organometallic chemistry; surface chemistry; ligand and support effects; supported and confined metal catalysts; magnetically induced catalysis
Dr. Patricia Lara

E-Mail Website
Guest Editor
Departamento de Química Inorgánica (University of Seville) – Institute for Chemical Research; Avda. Americo Vespucio 49, 41092 Seville, Spain
Interests: metal nanoparticles; surface chemistry; catalysis

Special Issue Information

Dear Colleagues,

As you know, the use of metal nanoparticles (MNPs) in catalysis has experienced growing interest in recent years. This revolution arises from the special features of MNPs as catalysts, which unify the advantages of both homogeneous and heterogeneous catalysts. MNPs exhibit the characteristic high stability and recyclability of heterogeneous catalysts but present a higher surface area (i.e., larger number of surface active sites). All of these elements make MNPs ideal catalysts for many catalytic processes. Therefore, the incorporation of recent advances, new reactions, and novel catalysts in this research area is of great interest for the scientific community.

This Special Issue of Catalysts centered on “Metal Nanoparticle Catalysis” will focus on all areas of current interest to metal nanoparticles in catalysis, including ligand-stabilized MNPs, atomically precise clusters, supported/encapsulated MNPs, subnanometer metal clusters, self-assembly of MNPs, ligand and support effects, surface studies, catalysis in ionic liquids, theoretical studies, laboratory and industrial applications and electrocatalysis, among others. Full papers, communications, reviews, and concepts in any topic related to the application of MNPs in catalysis are more than welcome and will be considered for publication.

Dr. Luis M. Martínez-Prieto
Dr. Patricia Lara
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

  • metal nanoparticles
  • catalysis
  • clusters
  • surface chemistry
  • ligand effects
  • support effects
  • colloids
  • supported metal nanoparticles

Published Papers (7 papers)

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Editorial

Jump to: Research, Review

2 pages, 183 KiB  
Editorial
Metal Nanoparticle Catalysis
by Patricia Lara and Luis M. Martínez-Prieto
Catalysts 2021, 11(10), 1210; https://doi.org/10.3390/catal11101210 - 09 Oct 2021
Cited by 2 | Viewed by 1563
Abstract
In recent years, the catalytic use of metal nanoparticles (MNPs) has experienced a growing interest [...] Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)

Research

Jump to: Editorial, Review

11 pages, 2360 KiB  
Article
Hexagonal WO3·0.33H2O Hierarchical Microstructure with Efficient Photocatalytic Degradation Activity
by Wei Li, Tingting Wang, Dongdong Huang, Chan Zheng, Yuekun Lai, Xueqing Xiao, Shuguang Cai and Wenzhe Chen
Catalysts 2021, 11(4), 496; https://doi.org/10.3390/catal11040496 - 14 Apr 2021
Cited by 9 | Viewed by 2280
Abstract
Structural design and morphological control of semiconductors is considered to be one of the most effective ways to improve their photocatalytic degradation properties. In the present work, a hexagonal WO3·0.33H2O hierarchical microstructure (HWHMS) composed of nanorods was successfully prepared [...] Read more.
Structural design and morphological control of semiconductors is considered to be one of the most effective ways to improve their photocatalytic degradation properties. In the present work, a hexagonal WO3·0.33H2O hierarchical microstructure (HWHMS) composed of nanorods was successfully prepared by the hydrothermal method. The morphology of the HWHMS was confirmed by field-emission scanning electron microscopy, and X-ray diffraction, Raman spectroscopy, and thermogravimetric analysis demonstrated that the synthesized product was orthorhombic WO3·0.33H2O. Owing to the unique hierarchical microstructure, the HWHMS showed larger Brunauer–Emmett–Teller (BET) surface and narrower bandgap (1.53 eV) than the isolated WO3·0.33H2O nanorods. Furthermore, the HWHMS showed enhanced photocatalytic activity for degradation of methylene blue under visible-light irradiation compared with the isolated nanorods, which can be ascribed to the narrower bandgap, larger BET specific surface area, and orthorhombic phase structure of the HWHMS. This work provides a potential protocol for construction of tungsten trioxide counterparts and materials similar to tungsten trioxide for application in gas sensors, photocatalysts, electrochromic devices, field-emission devices, and solar-energy devices. Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)
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12 pages, 8064 KiB  
Article
Nickel-Fe3O4 Magnetic Nanoparticles Supported on Multiwalled Carbon Nanotubes: Effective Catalyst in Suzuki Cross Coupling Reactions
by Sojeong K. Folsom, Destiny J. Ivey, Frank S. McNair and Ali R. Siamaki
Catalysts 2021, 11(4), 495; https://doi.org/10.3390/catal11040495 - 13 Apr 2021
Cited by 11 | Viewed by 2756
Abstract
Nickel-Fe3O4 nanoparticles supported on multi-walled carbon nanotubes (Ni-Fe3O4/MWCNTs) were synthesized by mechanical grinding of a sample of nickel salt, Fe3O4 and MWCNTs using a ball-mill mixer. The preparation method allows for bulk production [...] Read more.
Nickel-Fe3O4 nanoparticles supported on multi-walled carbon nanotubes (Ni-Fe3O4/MWCNTs) were synthesized by mechanical grinding of a sample of nickel salt, Fe3O4 and MWCNTs using a ball-mill mixer. The preparation method allows for bulk production of Ni-Fe3O4 nanoparticles at room temperature without the necessity of any solvent or chemical reagent. The nanoparticles prepared by this method exhibit small particles size of 5–8 nm with uniform dispersion of nickel nanoparticles on the surface of multi-walled carbon nanotubes. The Ni-Fe3O4/MWCNTs demonstrated remarkable catalytic activity for Suzuki cross coupling reactions of functionalized aryl halides and phenylboronic acids with excellent turnover number and turnover frequency (e.g., 76,000 h−1) using Monowave 50 conventional heating reactor at 120 °C within a very short reaction time of 15 min. The catalyst is air-stable and exhibits easy removal from the reaction mixture due to its magnetic properties, recyclability with no loss of activity, and significantly better performance than the other well-known commercial nickel catalyst. The Ni-Fe3O4/MWCNTs nanoparticles were fully characterized by a variety of spectroscopic techniques including X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and X-ray Photoelectron Spectroscopy (XPS). Since nickel offers similar properties to other more expensive transition metals including the most widely used palladium counterpart in cross coupling catalysis, this work demonstrates a promising lower-cost, air-moisture stable and efficient alternative catalyst based on nickel nanoparticles for cross coupling reactions. Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)
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15 pages, 5046 KiB  
Article
CO2 Methanation over Rare Earth Doped Ni-Based Mesoporous Ce0.8Zr0.2O2 with Enhanced Low-Temperature Activity
by Zhenglong Yang, Yan Cui, Pengxiang Ge, Mindong Chen and Leilei Xu
Catalysts 2021, 11(4), 463; https://doi.org/10.3390/catal11040463 - 01 Apr 2021
Cited by 7 | Viewed by 1997
Abstract
The Ni-based catalysts have a wide range of industrial applications due to its low cost, but its activity of CO2 methanation is not comparable to that of precious metal catalysts. In order to solve this problem, Ni-based mesoporous Ce0.8Zr0.2 [...] Read more.
The Ni-based catalysts have a wide range of industrial applications due to its low cost, but its activity of CO2 methanation is not comparable to that of precious metal catalysts. In order to solve this problem, Ni-based mesoporous Ce0.8Zr0.2O2 solid solution catalysts doped with rare earth were prepared by the incipient impregnation method and directly used as catalysts for the methanation of CO2. The catalysts were characterized systematically by X-ray powder diffraction (XRD), N2 physisorption, transmission electron microscopy (TEM), energy-dispersed spectroscopy (EDS) mapping, X-ray photoelectron spectroscopy (XPS), H2 temperature programmed reduction (H2-TPR), CO2 temperature programmed desorption (CO2-TPD), and so on. The results show that Ni is highly dispersed in the mesoporous skeleton, forming a strong metal-skeleton interaction. Therefore, under the condition of CO2 methanation, the hot sintering of metallic Ni nanoparticles can be effectively inhibited so that these mesoporous catalysts have good stability without obvious deactivation. The rare earth doping can significantly increase the surface alkalinity of catalyst and enhance the chemisorption of CO2. In addition, the rare earth elements also act as electron modifiers to help activate CO2 molecules. Therefore, the rare earth doped Ni-based mesoporous Ce0.8Zr0.2O2 solid solution catalysts are expected to be an efficient catalyst for the methanation of CO2 at low-temperature. Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)
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14 pages, 3357 KiB  
Article
Sustainable Hydrogenation of Vinyl Derivatives Using Pd/C Catalysts
by Roman M. Mironenko, Elina R. Saybulina, Liudmila N. Stepanova, Tatiana I. Gulyaeva, Mikhail V. Trenikhin, Konstantin S. Rodygin and Valentine P. Ananikov
Catalysts 2021, 11(2), 179; https://doi.org/10.3390/catal11020179 - 28 Jan 2021
Cited by 6 | Viewed by 2909
Abstract
The hydrogenation of unsaturated double bonds with molecular hydrogen is an efficient atom-economic approach to the production of a wide range of fine chemicals. In contrast to a number of reducing reagents typically involved in organic synthesis, hydrogenation with H2 is much [...] Read more.
The hydrogenation of unsaturated double bonds with molecular hydrogen is an efficient atom-economic approach to the production of a wide range of fine chemicals. In contrast to a number of reducing reagents typically involved in organic synthesis, hydrogenation with H2 is much more sustainable since it does not produce wastes (i.e., reducing reagent residues). However, its full sustainable potential may be achieved only in the case of easily separable catalysts and high reaction selectivity. In this work, various Pd/C catalysts were used for the liquid-phase hydrogenation of O-, S-, and N-vinyl derivatives with molecular hydrogen under mild reaction conditions (room temperature, pressure of 1 MPa). Complete conversion and high hydrogenation selectivity (>99%) were achieved by adjusting the type of Pd/C catalyst. Thus, the proposed procedure can be used as a sustainable method for vinyl group transformation by hydrogenation reactions. The discovery of the stability of active vinyl functional groups conjugated with heteroatoms (O, S, and N) under hydrogenation conditions over Pd/C catalysts opens the way for many useful transformations. Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)
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18 pages, 8514 KiB  
Article
Rhodium Nanoparticles Stabilized by PEG-Tagged Imidazolium Salts as Recyclable Catalysts for the Hydrosilylation of Internal Alkynes and the Reduction of Nitroarenes
by Guillem Fernández and Roser Pleixats
Catalysts 2020, 10(10), 1195; https://doi.org/10.3390/catal10101195 - 15 Oct 2020
Cited by 6 | Viewed by 2516
Abstract
PEGylated imidazolium (bromide and tetrafluoroborate) and tris-imidazolium (bromide) salts containing triazole linkers have been used as stabilizers for the preparation of water-soluble rhodium(0) nanoparticles by reduction of rhodium trichloride with sodium borohydride in water at room temperature. The nanomaterials have been characterized (Transmission [...] Read more.
PEGylated imidazolium (bromide and tetrafluoroborate) and tris-imidazolium (bromide) salts containing triazole linkers have been used as stabilizers for the preparation of water-soluble rhodium(0) nanoparticles by reduction of rhodium trichloride with sodium borohydride in water at room temperature. The nanomaterials have been characterized (Transmission Electron Microscopy, Electron Diffraction, X-ray Photoelectron Spectroscopy, Inductively Coupled Plasma-Optical Emission Spectroscopy). They proved to be efficient and recyclable catalysts for the stereoselective hydrosilylation of internal alkynes, in the presence or absence of solvent, and in the reduction of nitroarenes to anilines with ammonia-borane as hydrogen donor in aqueous medium (1:4 tetrahydrofuran/water). Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)
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Review

Jump to: Editorial, Research

30 pages, 9681 KiB  
Review
Organometallic Nanoparticles Ligated by NHCs: Synthesis, Surface Chemistry and Ligand Effects
by Christian Cerezo-Navarrete, Patricia Lara and Luis M. Martínez-Prieto
Catalysts 2020, 10(10), 1144; https://doi.org/10.3390/catal10101144 - 03 Oct 2020
Cited by 13 | Viewed by 4197
Abstract
Over the last 20 years, the use of metallic nanoparticles (MNPs) in catalysis has awakened a great interest in the scientific community, mainly due to the many advantages of this kind of nanostructures in catalytic applications. MNPs exhibit the characteristic stability of heterogeneous [...] Read more.
Over the last 20 years, the use of metallic nanoparticles (MNPs) in catalysis has awakened a great interest in the scientific community, mainly due to the many advantages of this kind of nanostructures in catalytic applications. MNPs exhibit the characteristic stability of heterogeneous catalysts, but with a higher active surface area than conventional metallic materials. However, despite their higher activity, MNPs present a wide variety of active sites, which makes it difficult to control their selectivity in catalytic processes. An efficient way to modulate the activity/selectivity of MNPs is the use of coordinating ligands, which transforms the MNP surface, subsequently modifying the nanoparticle catalytic properties. In relation to this, the use of N-heterocyclic carbenes (NHC) as stabilizing ligands has demonstrated to be an effective tool to modify the size, stability, solubility and catalytic reactivity of MNPs. Although NHC-stabilized MNPs can be prepared by different synthetic methods, this review is centered on those prepared by an organometallic approach. Here, an organometallic precursor is decomposed under H2 in the presence of non-stoichiometric amounts of the corresponding NHC-ligand. The resulting organometallic nanoparticles present a clean surface, which makes them perfect candidates for catalytic applications and surface studies. In short, this revision study emphasizes the great versatility of NHC ligands as MNP stabilizers, as well as their influence on catalysis. Full article
(This article belongs to the Special Issue Metal Nanoparticle Catalysis)
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