Special Issue "Palladium Catalysts: From Design to Applications"

A special issue of Inorganics (ISSN 2304-6740).

Deadline for manuscript submissions: closed (30 September 2020).

Special Issue Editor

Dr. Oscar Navarro
E-Mail Website
Guest Editor
R&D Director, Socati Technologies, Woodburn, Oregon, USA
Interests: catalysis; metal-based catalysts; polymerizations; dental materials

Special Issue Information

Dear Colleagues,

The ubiquity of palladium catalysts in academia an industry is an undeniable reality. Countless palladium catalysts have been developed for applications that range from small molecule synthesis, pharmaceuticals, polymer synthesis and oxidations, to name a few. This is the result of a combination of versatility, stability and user-friendly nature, when compared to other metals commonly used in catalysis. This versatility (both in their synthesis and their application) offers a researcher a plethora of possibilities to consider when designing a palladium catalyst for a specific purpose: Homogeneous, heterogeneous, well-defined, in-situ formed, recyclable, ligandless, etc.

This Special Issue intends to cover all aspects of palladium catalysts, from catalyst design to applications in catalytic processes, including novel applications of known palladium catalysts. In accordance with the nature and importance of this metal, this Issue aims to be representative of the omnipresence of palladium in catalysis, covering heterogeneous and homogeneous catalysis performed with either well-defined, in-situ or ligandless palladium catalysts.

Dr. Oscar Navarro
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. Inorganics 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 1400 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

  • Palladium
  • Catalysis
  • Ligand design
  • Homogeneous catalysis
  • Heterogeneous catalysis

Published Papers (3 papers)

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Research

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Article
Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction
Inorganics 2020, 8(11), 59; https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8110059 - 28 Oct 2020
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Abstract
Precious metal nanoparticles, in particular palladium nanomaterials, show excellent catalytic properties and are key in the development of energy systems. For instance, ethanol fuel cells are promising devices for sustainable energy conversion, where Pd-based catalysts are key catalysts for the related ethanol oxidation [...] Read more.
Precious metal nanoparticles, in particular palladium nanomaterials, show excellent catalytic properties and are key in the development of energy systems. For instance, ethanol fuel cells are promising devices for sustainable energy conversion, where Pd-based catalysts are key catalysts for the related ethanol oxidation reaction (EOR). Pd is a limited resource; thus, a remaining challenge is the development of efficient and stable Pd-based catalysts. This calls for a deeper understanding of the Pd properties at the nanoscale. This knowledge can be gained in comparative studies of different Pd nanomaterials. However, such studies remain challenging to perform and interpret due to the lack of cross-studies using the same Pd nanomaterials as a reference. Here, as-prepared sub 3 nm diameter surfactant-free Pd nanoparticles supported on carbon are obtained by a simple approach. The as-prepared catalysts with Pd loading 10 and 30 wt % show higher activity and stability compared to commercially available counterparts for the EOR. Upon electrochemical testing, a significant size increase and loss of electrochemical active surface are observed for the as-prepared catalysts, whereas the commercial samples show an increase in the electrochemically active surface area and moderate size increase. This study shines light on the challenging comparison of different catalysts across the literature. Further advancement in Pd (electro)catalyst design will gain from including self-prepared catalysts. The simple synthesis detailed easily leads to suitable nanoparticles to be used as a reference for more systematic comparative studies of Pd catalysts across the literature. Full article
(This article belongs to the Special Issue Palladium Catalysts: From Design to Applications)
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Review

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Review
Bulky-Yet-Flexible Carbene Ligands and Their Use in Palladium Cross-Coupling
Inorganics 2019, 7(6), 78; https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics7060078 - 21 Jun 2019
Cited by 11 | Viewed by 1945
Abstract
In recent years, several classes of new N-heterocyclic carbene (NHC) ligands were developed around the concept of “flexible steric bulk”. The steric hindrance of these ligands brings stability to the active species, while ligand flexibility still allows for the approach of the [...] Read more.
In recent years, several classes of new N-heterocyclic carbene (NHC) ligands were developed around the concept of “flexible steric bulk”. The steric hindrance of these ligands brings stability to the active species, while ligand flexibility still allows for the approach of the substrate. In this review, the synthesis of several types of new classes, such as IBiox, cyclic alkyl amino carbenes (CAAC), ITent, and IPr* are discussed, as well as how they move the state-of-the-art in palladium catalyzed cross-coupling forward. Full article
(This article belongs to the Special Issue Palladium Catalysts: From Design to Applications)
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Review
Electrocatalytic Activities towards the Electrochemical Oxidation of Formic Acid and Oxygen Reduction Reactions over Bimetallic, Trimetallic and Core–Shell-Structured Pd-Based Materials
Inorganics 2019, 7(3), 36; https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics7030036 - 07 Mar 2019
Cited by 10 | Viewed by 1910
Abstract
The structural design of nanosized electrocatalysts is extremely important for cathodic oxygen reduction reactions (ORR) and anodic oxidation reactions in small organic compounds in direct fuel cells. While Pt is still the most commonly used electrode material for ORR, the Pd electrocatalyst is [...] Read more.
The structural design of nanosized electrocatalysts is extremely important for cathodic oxygen reduction reactions (ORR) and anodic oxidation reactions in small organic compounds in direct fuel cells. While Pt is still the most commonly used electrode material for ORR, the Pd electrocatalyst is a promising alternative to Pt, because it exhibits much higher electrocatalytic activity towards formic acid electrooxidation, and the electrocatalytic activity of ORR on the Pd electrode is the higher than that of all other precious metals, except for Pt. In addition, the mass activity of Pt in a core–shell structure for ORR can be improved significantly by using Pd and Pd-based materials as core materials. Herein, we review various nanoscale Pd-based bimetallic, trimetallic and core–shell electrocatalysts for formic acid oxidation and ORR of polymer electrolyte fuel cells (PEFCs). This review paper is separated into two major topics: the electrocatalytic activity towards formic acid oxidation over various Pd-based electrocatalysts, and the activity of ORR on Pd-based materials and Pd core–Pt shell structures. Full article
(This article belongs to the Special Issue Palladium Catalysts: From Design to Applications)
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