Issue 10, 2023

Electro- and photoactivation of silver–iron oxide particles as magnetically recyclable catalysts for cross-coupling reactions

Abstract

Colloidal Ag particles decorated with Fe3O4 islands can be electrochemically or photochemically activated as inverse catalysts for C(sp2)–H heteroarylation. The silver–iron oxide (SIO) particles are reduced into redox-active forms by cathodic charging at mild potentials or by short-term light exposure, and can be reused multiple times by magnetic cycling without further activation. A negative shift in the reduction peak is attributed to an overpotential produced by surface Fe3O4 which separates residual Ag ions or clusters from bulk silver. The catalytic efficiency of SIO is maintained even with acid degradation, which can be countered simply by adding water to the reaction medium.

Graphical abstract: Electro- and photoactivation of silver–iron oxide particles as magnetically recyclable catalysts for cross-coupling reactions

Supplementary files

Article information

Article type
Paper
Submitted
23 Aug. 2022
Accepted
13 Febr. 2023
First published
14 Febr. 2023

Nanoscale, 2023,15, 5074-5082

Author version available

Electro- and photoactivation of silver–iron oxide particles as magnetically recyclable catalysts for cross-coupling reactions

Q. Wang, Z. Shang, H. Wang and A. Wei, Nanoscale, 2023, 15, 5074 DOI: 10.1039/D2NR04629F

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