Submit to Catalysts Review for Catalysts Propose a Special Issue

Journal Browser

► Journal Browser

Cobalt Catalysis: Recent Progress and Developments

Print Special Issue Flyer
Special Issue Editors
Special Issue Information
Keywords
Published Papers

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

Deadline for manuscript submissions: closed (31 January 2021) | Viewed by 17716

Share This Special Issue

Special Issue Editors

Dr. Jose R. Cabrero-Antonino

E-Mail Website
Guest Editor

Instituto de Tecnología Química (Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas), Avda de los Naranjos s/n, 46022 València, Spain
Interests: metal-based catalysis applied to organic synthesis; (de)hydrogenative transformations; carboxylic acid derivatives and CO₂ employment

Dr. Rosa Adam

E-Mail Website
Guest Editor

Instituto de Tecnología Química (Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas), Avda de los Naranjos s/n, 46022 València, Spain
Interests: organic synthesis; homogeneous and heterogeneous catalysis; CO₂ utilization

Special Issue Information

Dear Colleagues,

Cobalt-based catalysts, either heterogeneous or homogeneous, have been intensively developed since the beginning of the XX century owing to their activity in Fischer–Tropsch and hydroformylation processes. Hence, cobalt catalysts have constituted key materials for humankind’s modern development. Since the new century, myriad novel cobalt-based systems have been explored, leading to the discovery of new catalytic activities previously attributed exclusively to precious metals.

This Special Issue of Catalysts intends to cover recent developments in cobalt catalysis either related to well-known reactions (Fisher–Tropsch, carbonylation, oxidation, hydrodesulfuration), as well as more recently discovered catalytic applications of this metal (de/hydrogenation, hydroaddition, C–C coupling, CH activation, electrocatalysis, photocatalysis, CO₂ utilization, etc.). We would like to give a general overview of the field, including methodology development, mechanistic studies, well-defined homogeneous catalysts advances, and design and characterization of nanostructured catalysts (including nanoparticles, single atoms, MOF, etc.).

Dr. Jose R. Cabrero-Antonino
Dr. Rosa Adam
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

cobalt
homogeneous catalysis
heterogeneous catalysis
base metals

Published Papers (5 papers)

Download All Papers

Research

Jump to: Review

11 pages, 1582 KiB

Open AccessArticle

Photoelectrochemical Water Oxidation by Cobalt Cytochrome C Integrated-ATO Photoanode

by Carla Casadevall, Haojie Zhang, Shaojiang Chen, Dayn J. Sommer, Dong-Kyun Seo and Giovanna Ghirlanda

Catalysts 2021, 11(5), 626; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11050626 - 12 May 2021

Cited by 2 | Viewed by 2815

Abstract

Here, we report the immobilization of Co-protoporphyrin IX (Co-PPIX) substituted cytochrome c (Co-cyt c) on Antimony-doped Tin Oxide (ATO) as a catalyst for photoelectrochemical oxidation of water. Under visible light irradiation (λ > 450 nm), the ATO-Co-cyt c photoanode displays ~6-fold enhancement in photocurrent density relative to ATO-Co-PPIX at 0.25 V vs. RHE at pH 5.0. The light-induced water oxidation activity of the system was demonstrated by detecting evolved stoichiometric oxygen by gas chromatography, and incident photon to current efficiency was measured as 4.1% at 450 nm. The faradaic efficiency for the generated oxygen was 97%, with a 671 turnover number (TON) for oxygen. The current density had a slow decay over the course of 6 h of constant irradiation and applied potential, which exhibits the robustness of catalyst-ATO interaction. Full article

(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)

► Show Figures

Figure 1

16 pages, 4367 KiB

Open AccessFeature PaperEditor’s ChoiceArticle

CpCo(III) Precatalysts for [2+2+2] Cycloadditions

by Fabian Fischer, Michael Eder and Marko Hapke

Catalysts 2021, 11(5), 596; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11050596 - 04 May 2021

Cited by 2 | Viewed by 2972

Abstract

Catalysts applied in cobalt-catalyzed cyclotrimerizations reactions in general rely on the use of Co(I) precatalysts or the in situ generation of Co(I) catalysts from Co(II) sources by reduction in the presence of steering ligands, often by addition of less noble metals. In this paper, we report the synthesis and properties of novel stable CpCo(III) complexes as precatalysts and their exemplary evaluation for application in catalytic [2+2+2] cycloadditions. The role of phosphite neutral ligands, as well as iodide and cyanide as anionic ligands, on the reactivity of the complexes was evaluated. A modified one-pot approach to the synthesis of Cp ring-functionalized Cp’Co(III) complexes was developed. The investigations demonstrated that CpCo(III) complexes can be directly applied as catalysts in catalytic cyclotrimerizations of triynes without reducing agents as additives. Full article

(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)

► Show Figures

Graphical abstract

12 pages, 4283 KiB

Open AccessArticle

Replacing Pyridine with Pyrazine in Molecular Cobalt Catalysts: Effects on Electrochemical Properties and Aqueous H₂ Generation

by Lars Kohler, Andrea M. Potocny, Jens Niklas, Matthias Zeller, Oleg G. Poluektov and Karen L. Mulfort

Catalysts 2021, 11(1), 75; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11010075 - 07 Jan 2021

Cited by 4 | Viewed by 2561

Abstract

Four new molecular Co(II)tetrapyridyl complexes were synthesized and evaluated for their activity as catalysts for proton reduction in aqueous environments. The pyridine groups around the macrocycle were substituted for either one or two pyrazine groups. Single crystal X-ray analysis shows that the pyrazine groups have minimal impact on the Co(II)–N bond lengths and molecular geometry in general. X-band EPR spectroscopy confirms the Co(II) oxidation state and the electronic environment of the Co(II) center are only very slightly perturbed by the substitution of pyrazine groups around the macrocycle. The substitution of pyrazine groups has a substantial impact on the observed metal- and ligand-centered reduction potentials as well as the overall H₂ catalytic activity in a multimolecular system using the [Ru(2,2′-bipyridine)₃]Cl₂ photosensitizer and ascorbic acid as a sacrificial electron donor. The results reveal interesting trends between the H₂ catalytic activity for each catalyst and the driving force for electron transfer between either the reduced photosensitizer to catalyst step or the catalyst to proton reduction step. The work presented here showcases how even the difference of a single atom in a molecular catalyst can have an important impact on activity and suggests a pathway to optimize the photocatalytic activity and stability of molecular systems. Full article

(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)

► Show Figures

Graphical abstract

Review

Jump to: Research

28 pages, 1278 KiB

Open AccessReview

Recent Advances in Applications of Co-B Catalysts in NaBH₄-Based Portable Hydrogen Generators

by Valentina I. Simagina, Anna M. Ozerova, Oksana V. Komova and Olga V. Netskina

Catalysts 2021, 11(2), 268; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11020268 - 17 Feb 2021

Cited by 24 | Viewed by 3218

Abstract

This review highlights the opportunities of catalytic hydrolysis of NaBH₄ with the use of inexpensive and active Co-B catalysts among the other systems of hydrogen storage and generation based on water reactive materials. This process is important for the creation of H₂ generators required for the operation of portable compact power devices based on low-temperature proton exchange membrane fuel cells (LT PEM FC). Special attention is paid to the influence of the reaction medium on the formation of active state of Co-B catalysts and the problem of their deactivation in NaBH₄ solution stabilized by alkali. The novelty of this review consists in the discussion of basic designs of hydrogen generators based on NaBH₄ hydrolysis using cobalt catalysts and the challenges of their integration with LT PEM FC. The potential of using batch reactors in which there is no need to use aggressive alkaline NaBH₄ solutions is discussed. Solid-phase compositions or pellets based on NaBH₄ and cobalt-containing catalytic additives are proposed, the hydrogen generation from which starts immediately after the addition of water. The review made it possible to formulate the most acute problems, which require new sci-tech solutions. Full article

(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)

► Show Figures

Graphical abstract

25 pages, 7872 KiB

Open AccessFeature PaperReview

Cobalt-Based Metal Organic Frameworks as Solids Catalysts for Oxidation Reactions

by Amarajothi Dhakshinamoorthy, Eva Montero Lanzuela, Sergio Navalon and Hermenegildo Garcia

Catalysts 2021, 11(1), 95; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11010095 - 12 Jan 2021

Cited by 12 | Viewed by 4608

Abstract

Metal organic frameworks (MOFs) are porous crystalline solids whose frameworks are constituted by metal ions/nodes with rigid organic linkers leading to the formation of materials having high surface area and pore volume. One of the unique features of MOFs is the presence of coordinatively unsaturated metal sites in their crystalline lattice that can act as Lewis acid sites promoting organic transformations, including aerobic oxidation reactions of various substrates such as hydrocarbons, alcohols, and sulfides. This review article summarizes the existing Co-based MOFs for oxidation reactions organized according to the nature of substrates like hydrocarbon, alcohol, olefin, and water. Both aerobic conditions and peroxide oxidants are discussed. Emphasis is placed on comparing the advantages of using MOFs as solid catalysts with respect to homogeneous salts in terms of product selectivity and long-term stability. The final section provides our view on future developments in this field. Full article

(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)

► Show Figures