Journal
SUSTAINABLE MATERIALS AND TECHNOLOGIES
Volume 25, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.susmat.2020.e00204
Keywords
Oxygen reduction reaction; Oxygen evolution reaction; Metal-air batteries; Electrocatalysts; Transition metal-based materials; Bifunctional electrocatalysts
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Funding
- National Natural Science Foundation of China [21705058]
- Six Talent Peaks Project of Jiangsu Province [XNY-009]
- Provincial Natural Science Foundation of Jiangsu [BK20191430]
- High-tech Research Key Laboratory of Zhenjiang [SS2018002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are two critical processes for metal-air batteries (MABs) that afford large energy capacity and high power density. However, both reactions suffer from sluggish kinetics. The availability of efficient electrocatalysts that could conquer activation energy barriers and accelerate reaction rates is crucial to tackling this issue. The noble metal-based electrocatalysts (e.g., Pt/C and Ru/IrO2) cannot meet the requirement for large-scale applications due to their scarce abundance, high cost, and insufficient stability. Transition metal-based materials can be a sustainable and promising candidate to replace the noble metal-based electrocatalysts for this purpose. This review intends to review the most recent, high performance, and sustainable strategies on tuning the catalytic activity of the transition metal-based materials toward ORR and OER. We also propose perspectives on remaining challenges and future research directions of transition metal-based bifunctional electrocatalysts toward practical applications. These fundamental design principles and strategies are crucial to guide and accelerate the design of the ideal catalysts and make possible the practical applications of MABs. (c) 2020 Published by Elsevier B.V.
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