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Special Issue "Bimetallic Catalysis"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organometallic Chemistry".

Deadline for manuscript submissions: closed (10 April 2017)

Special Issue Editor

Guest Editor
Dr. Nikolaos Dimitratos

School of Chemistry, Cardiff Catalysis Institute, Cardiff University, Main Building, Park Place, Cardiff, Wales, CF10 3AT, UK
Website | E-Mail
Interests: Heterogeneous catalysis; Catalysis for energy; H2 production; CO2 transformation to methanol; supported metal nanoparticles; Heteropolyacids; Biomass conversion; Bifunctional catalysts, Size and shape control of metal colloids; In situ and operando spectroscopy; advanced characterisation using Synchrotron and Neutron techniques

Special Issue Information

Dear Colleagues,

In recent decades, a wide variety of bimetallic catalysts have been reported for a range of catalytic applications for arrange of reactions, including, oxidation, hydrogenation, hydrogenolysis, and reforming reactions. The use of bimetallic catalysts has shown tremendous development, not only for conventional petroleum refineries, but also for newly proposed bio-refineries, where the fuels and chemicals are essential for a modern and green industrial society. The challenge of designing bimetallic catalysts with controlled properties in terms of size, shape, choice of support and characterising with the proper characterization techniques, is still one of the highest priorities in academia and the industrial sector.

We invite the scientific community to submit their contributions, in the form of original research articles and review articles that seek an excellent interaction between bimetallic catalysts and their applications in synthesis and catalysis. We are particularly interested in articles describing 1) the design of bimetallic catalysts, 2) the study of bimetallic catalysts with in situ and ex situ spectroscopic techniques, 3) computational modeling and simulation of bimetallic catalysts, and 4) the application of bimetallic catalysts in catalysis and energy.

Potential topics include, but are not limited to:

  • Synthesis of bimetallic catalysts
  • Characterization of bimetallic catalysts
  • Utilization of bimetallic catalysts in catalysis, including solar energy, chemical transformation, and energy production

Dr. Nikolaos Dimitratos
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 papers will be 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. Molecules 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 1800 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

  • Bimetallic catalysts
  • Catalytic applications
  • Advanced characterisation

Published Papers (3 papers)

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Research

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Open AccessArticle Effect of 2,6-Bis-(1-hydroxy-1,1-diphenyl-methyl) Pyridine as Organic Additive in Sulfide NiMoP/γ-Al2O3 Catalyst for Hydrodesulfurization of Straight-Run Gas Oil
Molecules 2017, 22(8), 1332; doi:10.3390/molecules22081332
Received: 13 July 2017 / Revised: 2 August 2017 / Accepted: 4 August 2017 / Published: 15 August 2017
Cited by 1 | PDF Full-text (5644 KB) | HTML Full-text | XML Full-text
Abstract
The effect of 2,6-bis-(1-hydroxy-1,1-diphenyl-methyl) pyridine (BDPHP) in the preparation of NiMoP/γ-Al2O3 catalysts have been investigated in the hydrodesulfurization (HDS) of straight-run gas oil. The γ-Al2O3 support was modified by surface impregnation of a solution of BDPHP to
[...] Read more.
The effect of 2,6-bis-(1-hydroxy-1,1-diphenyl-methyl) pyridine (BDPHP) in the preparation of NiMoP/γ-Al2O3 catalysts have been investigated in the hydrodesulfurization (HDS) of straight-run gas oil. The γ-Al2O3 support was modified by surface impregnation of a solution of BDPHP to afford BDPHP/Ni molar ratios (0.5 and 1.0) in the final composition. The highest activity for NiMoP materials was found when the molar ratio of BDPHP/Ni was of 0.5. X-ray diffraction (XRD) results revealed that NiMoP (0.5) showed better dispersion of MoO3 than the NiMoP (1.0). Fourier transform infrared spectroscopy (FT-IR) results indicated that the organic additive interacts with the γ-Al2O3 surface and therefore discards the presence of Mo or Ni complexes. Raman spectroscopy suggested a high Raman ratio for the NiMoP (0.5) sample. The increment of the Mo=O species is related to a major availability of Mo species in the formation of MoS2. The temperature programmed reduction (TPR) results showed that the NiMoP (0.5) displayed moderate metal–support interaction. Likewise, X-ray photoelectron spectroscopy (XPS) exhibited higher sulfurization degree for NiMoP (0.5) compared with NiMoP (1.0). The increment of the MoO3 dispersion, the moderate metal–support interaction, the increase of sulfurization degree and the increment of Mo=O species provoked by the BDPHP incorporation resulted in a higher gas oil HDS activity. Full article
(This article belongs to the Special Issue Bimetallic Catalysis)
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Open AccessArticle Pt-Au/MOx-CeO2 (M = Mn, Fe, Ti) Catalysts for the Co-Oxidation of CO and H2 at Room Temperature
Molecules 2017, 22(3), 351; doi:10.3390/molecules22030351
Received: 9 January 2017 / Revised: 17 February 2017 / Accepted: 21 February 2017 / Published: 27 February 2017
Cited by 1 | PDF Full-text (5618 KB) | HTML Full-text | XML Full-text
Abstract
A series of nanostructured Pt-Au/MOx-CeO2 (M = Mn, Fe, Ti) catalysts were prepared and their catalytic performance for the co-oxidation of carbon monoxide (CO) and hydrogen (H2) were evaluated at room temperature. The results showed that MOx
[...] Read more.
A series of nanostructured Pt-Au/MOx-CeO2 (M = Mn, Fe, Ti) catalysts were prepared and their catalytic performance for the co-oxidation of carbon monoxide (CO) and hydrogen (H2) were evaluated at room temperature. The results showed that MOx promoted the CO oxidation of Pt-Au/CeO2, but only the TiO2 could enhance co-oxidation of CO and H2 over Pt-Au/CeO2. Related characterizations were conducted to clarify the promoting effect of MOx. Temperature-programmed reduction of hydrogen (H2-TPR) and X-ray photoelectron spectroscopy (XPS) results suggested that MOx could improve the charge transfer from Au sites to CeO2, resulting in a high concentration of Ce3+ and cationic Au species which benefits for the CO oxidation. In-situ diffuse reflectance infrared Fourier transform spectroscopy (In-situ DRIFTS) results indicated that TiO2 could facilitate the oxidation of H2 over the Pt-Au/TiO2-CeO2 catalyst. Full article
(This article belongs to the Special Issue Bimetallic Catalysis)
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Review

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Open AccessReview Dinuclear Nickel(I) and Palladium(I) Complexes for Highly Active Transformations of Organic Compounds
Molecules 2018, 23(1), 140; doi:10.3390/molecules23010140
Received: 7 December 2017 / Revised: 8 January 2018 / Accepted: 9 January 2018 / Published: 11 January 2018
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Abstract
In typical catalytic organic transformations, transition metals in catalytically active complexes are present in their most stable valence states, such as palladium(0) and (II). However, some dimeric monovalent metal complexes can be stabilized by auxiliary ligands to form diamagnetic compounds with metal–metal bonding
[...] Read more.
In typical catalytic organic transformations, transition metals in catalytically active complexes are present in their most stable valence states, such as palladium(0) and (II). However, some dimeric monovalent metal complexes can be stabilized by auxiliary ligands to form diamagnetic compounds with metal–metal bonding interactions. These diamagnetic compounds can act as catalysts while retaining their dimeric forms, split homolytically or heterolytically into monomeric forms, which usually have high activity, or in contrast, become completely deactivated as catalysts. Recently, many studies using group 10 metal complexes containing nickel and palladium have demonstrated that under specific conditions, the active forms of these catalyst precursors are not mononuclear zerovalent complexes, but instead dinuclear monovalent metal complexes. In this mini-review, we have surveyed the preparation, reactivity, and the catalytic processes of dinuclear nickel(I) and palladium(I) complexes, focusing on mechanistic insights into the precatalyst activation systems and the structure and behavior of nickel and palladium intermediates. Full article
(This article belongs to the Special Issue Bimetallic Catalysis)
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