High-Loading Single-Atomic-Site Silver Catalysts with an Ag1–C2N1 Structure Showing Superior Performance for Epoxidation of Styrene

Shubo Tian, Chao Peng, Juncai Dong, Qi Xu, Zheng Chen, Dong Zhai, Yu Wang, Lin Gu, P. Hu, Haohong Duan, Dingsheng Wang, Yadong Li

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Epoxidation is an efficient chemical process for manufacturing styrene oxide; however, it remains a huge challenge to develop cost-effective and environment-friendly catalysts for facilitating this process. Herein, we reported a single-atomic-site Ag catalyst supported by mesoporous graphitic carbon nitride (Ag1/mpg-C3N4) with an Ag loading of up to 10.21 wt %, which is the highest loading among single-atomic-site Ag catalysts. The single-atomic-site Ag replaced the nitrogen of mpg-C3N4, possessing the Ag1–C2N1 structure. The Ag1/mpg-C3N4 catalyst with the Ag1–C2N1 structure exhibited outstanding catalytic performance for styrene epoxidation with excellent conversion (96%) and high selectivity (81%). This performance was superior to that of the analogous Ag nanoparticle/mpg-C3N4 catalyst and previously reported catalysts. Density functional theory calculations showed that the absorbed superoxide-like O2 species and the much lower reaction barrier to generating styrene oxide than the other products lead to high activity and selectivity, respectively.
Original languageEnglish
Pages (from-to)4946-4954
Number of pages9
JournalACS Catalysis
Volume11
Issue number9
Early online date08 Apr 2021
DOIs
Publication statusPublished - 07 May 2021

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