Yang, Shuai; Li, Xuewen; Tan, Tingyuan; Mao, Jianing; Xu, Qing; Liu, Minghao; Miao, Qiyang; Mei, BingBao; Qiao, Panzhe; Gu, Songqi; Sun, Fanfei; Ma, Jingyuan; Zeng, Gaofeng; Jiang, Zheng

APPLIED CATALYSIS B-ENVIRONMENTAL

2022, 307, 0926-3373

Yang, Shuai; Li, Xuewen; Tan, Tingyuan; Mao, Jianing; Xu, Qing; Liu, Minghao; Miao, Qiyang; Mei, BingBao; Qiao, Panzhe; Gu, Songqi; Sun, Fanfei; Ma, Jingyuan; Zeng, Gaofeng; Jiang, Zheng

Covalent organic frameworks linked by C=C bonds have gained great attention for various application, and their fully conjugated skeletons were potentially conversed into two-dimensional (2D) carbons. Herein, we described a novel strategy to fabricate 2D carbon nanorods from a sp(2) carbon linked COF, which had a high surface area of 804.8 m(2) g(-1). The one-dimensional channels confined the Fe ions during pyrolysis, which facilitated to form ultra-close atomic sites. The resulting catalyst displayed high catalytic activity towards oxygen reduction reaction, with a half-wave potential of 0.82 V and a mass activity of 4087.9 mA mg(-1) at 0.7 V versus RHE, which were high than those of Pt/C (0.81 V and 126.3 mA mg(-1)). The theoretical calculation revealed the close FeN4 sites achieved a lower *OH adsorption energy than isolated FeN4 sites. This work provides a new insight into developing single atom catalysts from COFs.