Carbonized metal-organic frameworks as bifunctional electrocatalysts for oxygen reduction/evolution reactions
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Date
2023-10
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University of New Brunswick
Abstract
Electrochemical energy devices like batteries and fuel cells as benign high-performance solutions for energy issues have been swiftly developed in recent decades. Both metal-air batteries and fuel cells use a positive electrode (cathode) that has a similar chemical composition to facilitate oxygen reduction reactions (ORR) during their operation. The second important reaction involving oxygen species is the oxygen evolution reaction (OER). This process is used in water electrolyzers to generate oxygen. An electrocatalyst incorporated in the electrodes in the above-listed energy systems is key to the efficient ORR and OER processes. Such electrocatalyst plays a critical role in overall performance, stability, and long cycle lifetime.
The main objective is to synthesize and evaluate the electrochemical performance of heteroatom-doped carbons made by pyrolysis of metal-organic frameworks (MOFs) and zeolitic imidazole frameworks (ZIFs). Although some of these catalysts demonstrated decent activity, further work is needed to prove their electrocatalytic performance.