Electron-rich isolated Pt active sites in ultrafine PtFe3 intermetallic catalyst for efficient alkene hydrosilylation

Yunhu Han, Yu Xiong, Chuangwei Liu, Hongwei Zhang, Meiqi Zhao, Wen Chen, Wenxing Chen, Wei Huang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Regulating electronic structure of active centres to improve the performance of catalysts has always been a notable research topic, in which many challenges still need to be solved urgently. Herein, we report a PtFe3 intermetallic catalyst anchored on N-doped carbon spheres (PtFe3/CN) with electron-rich isolated Pt active sites. The electron-rich nature of isolated Pt sites is attributed to the coordination of low electronegativity iron atoms. The PtFe3/CN catalyst showed a catalytic performance for the hydrosilylation of alkene superior to traditional single-atom Pt catalyst (coordinate with N etc. atoms) loading on N-doped graphene carbon (Pt1/CN) with electron-deficient isolated Pt sites and Pt nanoparticles supported N-doped carbon spheres (Pt NPs/CN) catalysts with the contiguous Pt sites. More importantly, turnover number (TON) of alkene hydrosilylation can reach a striking ca. 740,000 and no Pt leaching was detected. The opinion has been substantiated by both experimental and theoretical results that the PtFe3/CN catalyst can completely catalyze conversion of alkene and exhibit a high selectivity for anti-Markovnikov addition under environmentally friendly and mild conditions.

Original languageEnglish
Pages (from-to)351-359
Number of pages9
JournalJournal of Catalysis
Volume396
DOIs
StatePublished - Apr 2021

Keywords

  • Electron-rich feature
  • Hydrosilylation of alkene
  • Intermetallics
  • Isolated-Pt-sites catalyst
  • Size-atomic design strategy

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