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Catalysts
Special Issues
Oxygen Evolution Reaction (OER) and Oxygen Reduction Reaction (ORR) Electrocatalysis
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Oxygen Evolution Reaction (OER) and Oxygen Reduction Reaction (ORR) Electrocatalysis

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

Deadline for manuscript submissions: closed (15 November 2023) | Viewed by 1335

Special Issue Editors

Dr. Ting Zhang

E-Mail Website
Guest Editor
CORC Center, Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
Interests: electrocatalysis; CO2 reduction reaction; single-atom catalysts; water splitting; MOFs; TEM
Special Issues, Collections and Topics in MDPI journals
Dr. Zhifu Liang

E-Mail Website
Guest Editor
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, BIST, Campus UAB, Bellaterra, 08193 Catalonia, Spain
Interests: electrochemical catalysis and synthesis; polymer chemistry; rechargeable batteries; environmental chemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Xu Han

E-Mail Website
Guest Editor
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Catalonia, Spain
Interests: electrocatalysis; CO2 reduction reaction; single-atom catalysts; MOFs; TEM

Special Issue Information

Dear Colleagues,

The electrocatalytic oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), known as oxygen electrocatalysis, play a key role in sustainable energy conversion and storage devices, such as unitized regenerative fuel cells and rechargeable metal–air batteries, which has attracted the attention of many researchers in the past few decades. In fuel cells and metal–air batteries, the cathode of the battery transports oxygen ions and provides a site for the oxygen reduction reaction. However, due to a complex four proton-coupled electron transfer process, the sluggish kinetics still render OER/ORR catalysts less efficient for the practical efficiency of these sustainable electrochemical devices. Moreover, the complexity of the catalyst–electrolyte interface makes a comprehensive understanding of the intrinsic OER/ORR mechanisms challenging. Recently, for the OER and ORR, the best-performing electrocatalysts remain dominated by precious metals, such as, Ir and Pt. Therefore, the development of a highly efficient catalytic system is the key to improving device performance and reducing its manufacturing cost to meet the needs of next-generation battery commercialization.

This Special Issue entitled “OER/ORR electrocatalysis” will focus on the state of the art and outlooks for oxygen electrocatalysis. Submissions in the form of original research papers and review articles in the areas of designing novel OER/ORR electrocatalysts, developing new electrocatalytic systems, and finding new mechanisms for oxygen electrocatalysis are all welcome.

Dr. Ting Zhang
Dr. Zhifu Liang
Dr. Xu Han
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

  • OER
  • ORR
  • electrocatalyst
  • Zn–air batteries
  • electrolyte
  • mechanism

Published Papers (1 paper)

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Research

12 pages, 3489 KiB  
Article
Ni-Doped La0.6Sr0.4CoO3 Perovskite as an Efficient Electrocatalyst for Oxygen Reduction and Evolution Reactions in Alkaline Media
by Ronghua Yuan, Weina Xu, Liquan Pan, Ruibin Li, Chuanying Xiao and Xiaochang Qiao
Catalysts 2023, 13(10), 1366; https://doi.org/10.3390/catal13101366 - 13 Oct 2023
Cited by 1 | Viewed by 980
Abstract
The Co-based perovskite La0.6Sr0.4CoO3 has received significant attention as a potential electrocatalyst for its oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) due to its abundance, facile synthesis, and high oxygen kinetics. However, research on the catalytic [...] Read more.
The Co-based perovskite La0.6Sr0.4CoO3 has received significant attention as a potential electrocatalyst for its oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) due to its abundance, facile synthesis, and high oxygen kinetics. However, research on the catalytic performance of Ni-doped La0.6Sr0.4Co1−xNixO3 as a bifunctional cathode catalyst for Zn-air batteries (ZABs) is still scarce. In this work, lanthanum strontium cobalt-based perovskite catalysts with various Ni contents (La0.6Sr0.4Co1−xNixO3, x = 0, 0.2, 0.5, and 0.8) were synthesized using a simple combustion method. The effects of Ni doping on the morphology, structure, surface oxygen-related species, and valence states of the transition metals of the perovskite were characterized. The electrochemical behaviors of the perovskite catalysts in both ORR and OER were also assessed. The characterization results revealed that proper Ni doping can decrease particle size, increase surface oxygen vacancies, and create mixed valence states of the transition metal and, thus, lead to improvement of the electrocatalytic activity of perovskite catalysts. Among the different perovskite compositions, La0.6Sr0.4Co0.8Ni0.2O3 exhibited the best ORR/OER activity, with a higher limiting current density, smaller Tafel slope, higher half-wave potential, lower overpotential, and lower potential difference than the other compositions. When La0.6Sr0.4Co0.8Ni0.2O3 was applied as the cathodic catalyst in a primary ZAB, it delivered a peak power density of 81 mW cm−2. Additionally, in rechargeable ZABs, the La0.6Sr0.4Co0.8Ni0.2O3 catalyst exhibited a lower voltage gap (0.94 V) and higher stability during charge–discharge cycling than the commonly used catalyst Pt/C. These results indicate that Ni-doped La0.6Sr0.4Co0.8Ni0.2O3 is a promising bifunctional electrocatalyst for ZAB. Full article
(This article belongs to the Special Issue Oxygen Evolution Reaction (OER) and Oxygen Reduction Reaction (ORR) Electrocatalysis)
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