A Fe single atom on N, S-doped carbon catalyst for performing N-alkylation of aromatic amines under solvent-free conditions. Issue 44 (4th November 2021)

• Record Type: Journal Article
• Authors: Lu, Guo-Ping; Shan, Hongbin; Lin, Yamei; Zhang, Kai; Zhou, Baojing; Zhong, Qin; Wang, Pengcheng
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 44(2021)
• Page Start: 25128
• Page End: 25135
• Publication Date: 2021-11-04
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta07673f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A green and gram-scale strategy has been developed for the synthesis of Fe single atom/N, S-doped carbon catalyst via the pyrolysis of polyaniline-modified Fe, S-doped ZIFs, in which ZIFs can be prepared in water at room temperature. Abstract : A green and gram-scale strategy has been developed for the synthesis of Fe single atom/N, S-doped carbon catalyst (Fe20 -SA@NSC) via the pyrolysis of polyaniline (PAN)-modified Fe, S-doped ZIFs, in which the synthesis of ZIFs can be accomplished in water at room temperature. The as-prepared catalyst exhibits superior activity in the N-alkylation of amines with alcohols via a borrowing strategy under solvent-free conditions (TOF up to 13.9 h −1 ). Based on the HAADF-STEM and XAFS results, Fe in this material is dispersed as the single-atom Fe1 –N4 S1 site. According to the experimental and theoretical calculation results, the Fe1 –N4 S1 site displays a better borrowing hydrogen ability than other Fe sites owing to its higher electron density. In addition, this catalyst has excellent stability and recyclability, and no obvious loss in activity is observed after 7 runs.