It is of great interest to design the electrocatalysts from earth abundant metals for energy conversion and storage devices including fuel cell and metal-air batteries. Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play a critical role in sustainable energy technologies. However, development of highly efficient (active and durable), cost-effective and environmentally friendly bifunctional ORR/OER catalysts still remains a grand challenge for large-scale applications. Metal-organic framework (MOF) based catalysts appear as promising candidates due to their highly porous and tunable structure. Herein, we present optimal Mn/Co-MOF derived bifunctional electrocatalyst with superior electrocatalytic performance that is comparable to the state-of-the-art ORR/OER catalysts (Pt/C; RuO<sub>2</sub>/IrO<sub>2</sub>). Remarkably, the catalyst also displayed excellent charge-discharge durability with high power density in practical aqueous (6.0 M KOH) zinc−air battery (ZAB).

Mn/Co-MOF derived catalyst as an advanced reversible oxygen electrocatalyst for sustainable energy storage

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ACS Fall 2022

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