Recent Progress of Non-Noble Metal Catalysts for Oxygen Electrode in Zn-Air Batteries: A Mini Review

Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play crucial roles in energy conversion and storage devices. Particularly, the bifunctional ORR/OER catalysts are core components in rechargeable metal–air batteries, which have shown great promise in achieving "carbon emission...

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Published inCatalysts Vol. 12; no. 8; p. 843
Main Authors Sun, Jia, Wang, Ning, Qiu, Zhaozhong, Xing, Lixin, Du, Lei
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2022
Subjects
Analysis
Batteries
Carbon
Catalysts
Chemical reactions
Chemical reduction
Climate change
Corrosion
Electrocatalysts
Electrodes
Electrolytes
Energy consumption
Energy conversion
Energy storage
Environmental impact
Fossil fuels
Gases
Identification and classification
Kinetics
Metal air batteries
Metal catalysts
Methods
Noble metals
Oxidation-reduction reaction
Oxygen evolution reactions
Oxygen reduction reactions
Precious metals
Properties
Rechargeable batteries
Viscosity
Zinc compounds
Zinc-oxygen batteries
China
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Summary:Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play crucial roles in energy conversion and storage devices. Particularly, the bifunctional ORR/OER catalysts are core components in rechargeable metal–air batteries, which have shown great promise in achieving "carbon emissions peak and carbon neutrality" goals. However, the sluggish ORR and OER kinetics at the oxygen cathode significantly hinder the performance of metal–air batteries. Although noble metal-based catalysts have been widely employed in accelerating the kinetics and improving the bifunctionality, their scarcity and high cost have limited their deployment in the market. In this review, we will discuss the ORR and OER mechanisms, propose the principles for bifunctional electrocatalysts design, and present the recent progress of the state-of-the-art bifunctional catalysts, with the focus on non-noble metal-based materials to replace the noble metal catalysts in Zn–air batteries. The perspectives for the future R&D of bifunctional electrocatalysts will be provided toward high-performance Zn–air batteries at the end of this paper.
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ISSN:2073-4344
2073-4344
DOI:10.3390/catal12080843