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Catalysts
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(Photo)Electrochemistry of Perovskites
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(Photo)Electrochemistry of Perovskites

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: closed (15 March 2017)

Special Issue Editors

Prof. Dr. Christian Jooss

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Guest Editor
Institute of Materials Physics, University of Goettingen, Friedrich-Hund-Platz 1, 37085 Goettingen, Germany
Interests: interfaces in perovskite oxides, oxide photovoltaics and electrocatalysis; in situ and analytical electron microscopy
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yang Shao-Horn

E-Mail Website
Guest Editor
Department of Material Science and Engineering, Massachusetts Institute of Technology MIT, 77 Massachusetts Ave, Rm 3-334, Cambridge, MA 02139, USA
Interests: perovskites; electrochemistry; water splitting; Li-ion batteries; in situ x-ray spectroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The versatility of the perovskite structures and their rich structure–property relations is attracting a rapidly-growing attention in catalyst research. Composed by a corner sharing network of metal-anion octahedra, which is stabilized by A-site cations, perovskites form a rather thermodynamically stable structure. This allows, not only the incorporation of many different metals from almost the entire periodic system, but it also offers pathways for tuning active states of the catalysts and finding strategies for the rational design of catalyst activity and stability. An actual important example is the change between the metal center and oxygen-based redox activity of transition metal perovskite oxides in electrochemical water oxidation, which require a deeper understanding of the relationships between electronic band structure, vacancy mechanisms, and catalytic properties. 

Even small changes in chemical composition, doping, or defect concentrations can have a tremendous effect on the electronic structure and other materials properties. This Special Issue, thus, aims at contributing to an improved understanding of atomic scale structure property relations of perovskites, double perovskites and Ruddlesden-Popper phases for different catalytic applications, such as electrodes for water oxidation, oxygen evolution and reduction, solid oxide fuel cells, membrane reactors, oxygen permeation membranes, and in other photo-/electrocatalytic reactions. We also invite research groups contributing studies on perovskite structure-property relations in anion substituted systems, such as oxinitrates or oxichlorides.

Prof. Dr. Christian Jooss
Prof. Dr. Yang Shao-Horn
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 2200 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

  • Perovskites
  • Ruddlesden-Popper phases
  • Anionic and cationic substitutions
  • Electrodes for water oxidation
  • Oxygen evolution and reduction
  • Active sites and active states
  • Oxygen and cation vacancies
  • Defect reactions at surfaces
  • Electronic properties
  • Solid oxide fuel cell
  • Oxygen permeation membrane
  • Photo-/electrocatalytic mechanisms

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Related Special Issue

Published Papers (3 papers)

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Research

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3397 KiB  
Article
Tailoring the Oxygen Evolution Activity and Stability Using Defect Chemistry
by Julius Scholz, Marcel Risch, Garlef Wartner, Christoph Luderer, Vladimir Roddatis and Christian Jooss
Catalysts 2017, 7(5), 139; https://doi.org/10.3390/catal7050139 - 5 May 2017
Cited by 29 | Viewed by 7388
Abstract
Improving the activity of catalysts for the oxygen evolution reaction (OER) requires a detailed understanding of the surface chemistry and structure to deduce structure-function relationships (descriptors) for fundamental insight. We chose epitaxial (100)-oriented La0.6Sr0.4Mn1−δO3 (LSMO) thin [...] Read more.
Improving the activity of catalysts for the oxygen evolution reaction (OER) requires a detailed understanding of the surface chemistry and structure to deduce structure-function relationships (descriptors) for fundamental insight. We chose epitaxial (100)-oriented La0.6Sr0.4Mn1−δO3 (LSMO) thin films as a model system with high electrochemical activity comparable to (110)-oriented IrO2 to investigate the effect of Mn off-stoichiometry on both catalytic activity and stability. Extensive structural characterization was performed by microscopic and spectroscopic methods before and after electrochemical characterization using rotating ring-disk studies. Stoichiometric LSMO had the highest activity, while both Mn deficiency and excess reduced the catalytic activity. Furthermore, all samples preserved the crystal structure up to the very surface. Mn excess improved the long-term activity, and we hypothesize that excess Mn stabilizes the surface chemistry during catalysis. Our data show that the defect chemistry should be considered when designing catalysts with enhanced activity and rugged stability. Full article
(This article belongs to the Special Issue (Photo)Electrochemistry of Perovskites)
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Review

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3564 KiB  
Review
Perovskite Electrocatalysts for the Oxygen Reduction Reaction in Alkaline Media
by Marcel Risch
Catalysts 2017, 7(5), 154; https://doi.org/10.3390/catal7050154 - 13 May 2017
Cited by 91 | Viewed by 14793
Abstract
Oxygen reduction is considered a key reaction for electrochemical energy conversion but slow kinetics hamper application in fuel cells and metal-air batteries. In this review, the prospect of perovskite oxides for the oxygen reduction reaction (ORR) in alkaline media is reviewed with respect [...] Read more.
Oxygen reduction is considered a key reaction for electrochemical energy conversion but slow kinetics hamper application in fuel cells and metal-air batteries. In this review, the prospect of perovskite oxides for the oxygen reduction reaction (ORR) in alkaline media is reviewed with respect to fundamental insight into activity and possible mechanisms. For gaining these insights, special emphasis is placed on highly crystalline perovskite films that have only recently become available for electrochemical interrogation. The prospects for applications are evaluated based on recent progress in the synthesis of perovskite nanoparticles. The review concludes with the current understanding of oxygen reduction on perovskite oxides and a perspective on opportunities for future fundamental and applied research. Full article
(This article belongs to the Special Issue (Photo)Electrochemistry of Perovskites)
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3898 KiB  
Review
Factors Controlling the Redox Activity of Oxygen in Perovskites: From Theory to Application for Catalytic Reactions
by Chunzhen Yang and Alexis Grimaud
Catalysts 2017, 7(5), 149; https://doi.org/10.3390/catal7050149 - 11 May 2017
Cited by 90 | Viewed by 14746
Abstract
Triggering the redox reaction of oxygens has become essential for the development of (electro) catalytic properties of transition metal oxides, especially for perovskite materials that have been envisaged for a variety of applications such as the oxygen evolution or reduction reactions (OER and [...] Read more.
Triggering the redox reaction of oxygens has become essential for the development of (electro) catalytic properties of transition metal oxides, especially for perovskite materials that have been envisaged for a variety of applications such as the oxygen evolution or reduction reactions (OER and ORR, respectively), CO or hydrocarbons oxidation, NO reduction and others. While the formation of ligand hole for perovskites is well-known for solid state physicists and/or chemists and has been widely studied for the understanding of important electronic properties such as superconductivity, insulator-metal transitions, magnetoresistance, ferroelectrics, redox properties etc., oxygen electrocatalysis in aqueous media at low temperature barely scratches the surface of the concept of oxygen ions oxidation. In this review, we briefly explain the electronic structure of perovskite materials and go through a few important parameters such as the ionization potential, Madelung potential, and charge transfer energy that govern the oxidation of oxygen ions. We then describe the surface reactivity that can be induced by the redox activity of the oxygen network and the formation of highly reactive surface oxygen species before describing their participation in catalytic reactions and providing mechanistic insights and strategies for designing new (electro) catalysts. Finally, we give a brief overview of the different techniques that can be employed to detect the formation of such transient oxygen species. Full article
(This article belongs to the Special Issue (Photo)Electrochemistry of Perovskites)
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