Bifunctional metal-free catalysis of mesoporous noble carbons for oxygen reduction and evolution reactions

ChemSusChem
Ken SakaushiMarkus Antonietti

Abstract

Electrochemical oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are key reactions in lithium-oxygen batteries (LOBs) being a promising candidate to store renewable energies due to their high specific energy. However current development on LOBs is suffering from unsuitable catalysts. In particular, carbon-based catalysts were found to perform poorly in this system. Here, we show that metal-free mesoporous nitrogen-doped carbons (meso-NdCs) offer highly promising performances in both ORR and OER; they act as bifunctional catalysts, and can be synthesized by a very simple method. The efficient electrocatalytic activity of ORR and OER was used in a LOB cell during discharge and charge, respectively, and the present system showed a lower overpotential comparable to metal-based catalysts in LOB system. Thus, we demonstrate that meso-NdCs act as a new and affordable candidate for the efficient bifunctional oxygen catalysis, therefore can be applied to many energy-related applications.

References

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Citations

Jul 28, 2016·Angewandte Chemie·Chuangang Hu, Liming Dai
Sep 8, 2016·ACS Applied Materials & Interfaces·Jixin ZhuTim-Patrick Fellinger
Jan 14, 2017·Chemical Reviews·Masayoshi WatanabeKaoru Dokko
Nov 26, 2015·Science Advances·Jintao ZhangLiming Dai
Dec 12, 2018·Advanced Materials·Jing FuZhongwei Chen
Dec 19, 2019·Frontiers in Chemistry·Varun SinghWilhelm Schwieger
May 23, 2015·Accounts of Chemical Research·Ken Sakaushi, Markus Antonietti
May 24, 2019·ACS Applied Materials & Interfaces·Maria RetuertoSergio Rojas

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