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Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates

Lukato, Simon ; Wendt, Ola F. LU ; Wallenberg, Reine LU ; Kasozi, Gabriel N. ; Naziriwo, Betty ; Persson, Axel LU orcid ; Folkers, Laura C. LU and Tebandeke, Emmanuel LU (2021) In Results in Chemistry 3.
Abstract

We report an efficient process for the oxidation of benzyl alcohols using molecular oxygen as the oxidant catalyzed by Ag-Cu catalysts supported on polyoxometalates (Ag-Cu/POM). The Ag-Cu/POM catalyst was prepared by galvanic displacement in the presence of polyvinyl pyrrolidone and polyethylene glycol. The catalysts were characterized using Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), powder X-ray diffraction (PXRD), X-ray fluorescence (XRF), Brunauer-Emmett-Teller (BET) surface analysis, transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA). The oxidation reaction was carried out using a Schlenk– line setup, under ambient... (More)

We report an efficient process for the oxidation of benzyl alcohols using molecular oxygen as the oxidant catalyzed by Ag-Cu catalysts supported on polyoxometalates (Ag-Cu/POM). The Ag-Cu/POM catalyst was prepared by galvanic displacement in the presence of polyvinyl pyrrolidone and polyethylene glycol. The catalysts were characterized using Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), powder X-ray diffraction (PXRD), X-ray fluorescence (XRF), Brunauer-Emmett-Teller (BET) surface analysis, transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA). The oxidation reaction was carried out using a Schlenk– line setup, under ambient atmospheric pressure. Reaction products were identified by GC–MS and quantified with GC using an internal standard method. The Ag-Cu/POM catalyst gave close to 100% benzyl alcohol conversion in 5 h with >99% selectivity to benzaldehyde. When tested on various benzyl alcohol derivatives the Ag-Cu catalysts showed good conversions and >99% selectivity to the corresponding aldehydes. The Ag-Cu catalysts supported on the POM are highly stable, and don't show tendency to leach or deactivate. The catalysts are heterogeneous in nature and easy to recover after reactions, and could be reused at least 5 times without significant loss in activity and selectivity.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Benzyl alcohols oxidation, Molecular oxygen, Silver-copper supported catalysts
in
Results in Chemistry
volume
3
article number
100150
publisher
Elsevier
external identifiers
  • scopus:85108612899
ISSN
2211-7156
DOI
10.1016/j.rechem.2021.100150
language
English
LU publication?
yes
id
12440e8f-be0c-4865-97e7-98d38a5b6350
date added to LUP
2021-08-16 09:21:11
date last changed
2023-11-08 17:29:19
@article{12440e8f-be0c-4865-97e7-98d38a5b6350,
  abstract     = {{<p>We report an efficient process for the oxidation of benzyl alcohols using molecular oxygen as the oxidant catalyzed by Ag-Cu catalysts supported on polyoxometalates (Ag-Cu/POM). The Ag-Cu/POM catalyst was prepared by galvanic displacement in the presence of polyvinyl pyrrolidone and polyethylene glycol. The catalysts were characterized using Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), powder X-ray diffraction (PXRD), X-ray fluorescence (XRF), Brunauer-Emmett-Teller (BET) surface analysis, transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA). The oxidation reaction was carried out using a Schlenk– line setup, under ambient atmospheric pressure. Reaction products were identified by GC–MS and quantified with GC using an internal standard method. The Ag-Cu/POM catalyst gave close to 100% benzyl alcohol conversion in 5 h with &gt;99% selectivity to benzaldehyde. When tested on various benzyl alcohol derivatives the Ag-Cu catalysts showed good conversions and &gt;99% selectivity to the corresponding aldehydes. The Ag-Cu catalysts supported on the POM are highly stable, and don't show tendency to leach or deactivate. The catalysts are heterogeneous in nature and easy to recover after reactions, and could be reused at least 5 times without significant loss in activity and selectivity.</p>}},
  author       = {{Lukato, Simon and Wendt, Ola F. and Wallenberg, Reine and Kasozi, Gabriel N. and Naziriwo, Betty and Persson, Axel and Folkers, Laura C. and Tebandeke, Emmanuel}},
  issn         = {{2211-7156}},
  keywords     = {{Benzyl alcohols oxidation; Molecular oxygen; Silver-copper supported catalysts}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Results in Chemistry}},
  title        = {{Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates}},
  url          = {{http://dx.doi.org/10.1016/j.rechem.2021.100150}},
  doi          = {{10.1016/j.rechem.2021.100150}},
  volume       = {{3}},
  year         = {{2021}},
}