Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (6): 1891-1905.doi: 10.19799/j.cnki.2095-4239.2021.0401

• Special issue of hydrogen energy and fuel cell • Previous Articles     Next Articles

Recent advances in covalent organic frameworks COFs for electrocatalysis of oxygen electrodes

Wenwu ZOU(), Guoxing JIANG, Li DU()   

  1. The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2021-08-03 Revised:2021-08-05 Online:2021-11-05 Published:2021-11-03
  • Contact: Li DU E-mail:cezouww@mail.scut.edu.cn;duli@scut.edu.cn

Abstract:

Clean energy technologies such as fuel cells, water electrolysis, and metal-air batteries have improved energy efficiency and could become new energy consumption methods in the future to peak carbon dioxide emissions and achieve carbon neutrality. The sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) hinder the development of these clean energy technologies. Although noble metal catalysts are considered superior, they have apparent disadvantages, such as poor durability, low selectivity, and high cost. The determination of noble metal-free catalysts has become a trend in related researches. As an emerging class of polymer materials linked by special covalent bonds, covalent organic frameworks (COFs) demonstrate advantages of tunable structure, low density, high stability, and large specific surface area. COFs are widely considered as promising electrocatalysts that can be gradually applied utilizing reasonable design strategies. Herein, this review aims to research 2D COFs suitable for ORR, OER, and bifunctional electrocatalysis in recent years and primarily introduces the strategies of pristine COF as an electrocatalyst, composite structure formation, and pyrolysis. The key factors for forming electrocatalytic active centers or improving electrocatalytic activity have been summarized from the molecular design and electronic tuning aspects, which are expected to serve as a reference in future works.

Key words: covalent organic frameworks (COFs), oxygen reduction reaction (ORR), oxygen evolution reaction (OER), electrocatalyst

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