Selective oxygen reduction reaction: mechanism understanding, catalyst design and practical application

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Abstract

The oxygen reduction reaction (ORR) is a key component for many clean energy technologies and other industrial processes. However, the low selectivity and the sluggish reaction kinetics of ORR catalysts have hampered the energy conversion efficiency and real application of these new technologies mentioned before. Recently, tremendous efforts have been made in mechanism understanding, electrocatalyst development and system design. Here, a comprehensive and critical review is provided to present the recent advances in the field of the electrocatalytic ORR. The two-electron and four-electron transfer catalytic mechanisms and key evaluation parameters of the ORR are discussed first. Then, the up-to-date synthetic strategies and in situ characterization techniques for ORR electrocatalysts are systematically summarized. Lastly, a brief overview of various renewable energy conversion devices and systems involving the ORR, including fuel cells, metal-air batteries, production of hydrogen peroxide and other chemical synthesis processes, along with some challenges and opportunities, is presented.

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Li, S., Shi, L., Guo, Y., Wang, J., Liu, D., & Zhao, S. (2024, June 27). Selective oxygen reduction reaction: mechanism understanding, catalyst design and practical application. Chemical Science. Royal Society of Chemistry. https://doi.org/10.1039/d4sc02853h

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