A Nitrogen, Sulfur co-Doped Porphyrin-based Covalent Organic Framework as an Efficient Catalyst for Oxygen Reduction

• Published in: Chemical research in Chinese universities Vol. 38; no. 1; pp. 167 - 172
• Main Authors: Yu, Xiaoming, Ma, Yunchao, Li, Cuiyan, Guan, Xinyu, Fang, Qianrong, Qiu, Shilun
• Format: Journal Article
• Language: English
• Published: Changchun Jilin University and The Editorial Department of Chemical Research in Chinese Universities 01.02.2022; Springer Nature B.V
• Subjects: Analytical Chemistry; Catalysts; Charge distribution; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Doping; Energy conversion; Fuel cells; Inorganic Chemistry; Metal air batteries; Nitrogen; Organic Chemistry; Oxygen reduction reactions; Physical Chemistry; Porphyrins; Sulfur; Synergistic effect; Covalent organic framework(COF); Oxygen reduction reaction; co-Doped material
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-021-1374-1

O xygen reduction reaction(ORR) is a significant reaction for energy conversion systems(such as fuel cells, metal-air batteries, etc.). It is an urgent need to develop cheap, durable and highly-active catalysts for efficient ORR. Hence, we report a metal-free nitrogen and sulfur co-doped porphyrin-based covalent organic framework(COF) as a high-efficiency ORR catalyst[the onset potential( E o ) is 0.79 V and the half-wave potential( E 1/2 ) is 0.70 V]. The double doping of N and S atoms causes uneven charge distribution around carbon atoms, which can act as catalytic active centers, improving ORR activity. Compared with single-atom doping, double atoms doping exhibits a higher activity due to the synergistic effect between different elements. These results demonstrate that reasonable design of stable metal-free COFs with a high electrochemical activity can promote their wide applications.