Tuning Polarity of Cu-O Bond in Heterogeneous Cu Catalyst to Promote Additive-free Hydroboration of Alkynes

Jian Zhang, Ziyun Wang, Wenxing Chen, Yu Xiong, Weng Chon Cheong, Lirong Zheng, Wensheng Yan, Lin Gu, Chen Chen, Qing Peng, P. Hu, Dingsheng Wang*, Yadong Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Precise control of structural parameters to optimize the performance of heterogeneous catalysts remains a challenging issue. A direct route is to adjust the nature of chemical bonds around active centers, but this has not yet been achieved because of the complexity of heterogeneous catalysts. We utilize an effective strategy to increase the polarity of the Cu-O bond in the ceria-supported, single-atomic-site Cu catalyst for boosting the additive-free hydroboration of alkynes, producing various important vinylboronate compounds. In contrast to the more covalent Cu-O bond, the more ionic Cu-O bond in the catalyst enhances the activity by almost 16-fold. Key intermediate copper ethoxide species preferring to generate on the more ionic Cu-O bond from the dissociation of ethanol results in the improved activity. These results may provide valuable clues for regulating the nature of chemical bonds in heterogeneous catalysts and deepening the understanding of its impact on catalytic behaviors.

Original languageEnglish
Pages (from-to)725-737
JournalChem
Volume6
Issue number3
Early online date16 Jan 2020
DOIs
Publication statusPublished - 12 Mar 2020

Keywords

  • additive-free condition
  • bond polarity
  • copper
  • ethanol dissociation
  • heterogeneous catalysis
  • hydroboration of alkyne
  • SDG9: Industry, innovation, and infrastructure
  • single-atomic-site catalyst

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Biochemistry, medical
  • Materials Chemistry

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