Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates
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 gly...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-01-01
|
| Series: | Results in Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715621000552 |
| _version_ | 1818871935097896960 |
|---|---|
| author | Simon Lukato Ola F. Wendt Reine Wallenberg Gabriel N. Kasozi Betty Naziriwo Axel Persson Laura C. Folkers Emmanuel Tebandeke |
| author_facet | Simon Lukato Ola F. Wendt Reine Wallenberg Gabriel N. Kasozi Betty Naziriwo Axel Persson Laura C. Folkers Emmanuel Tebandeke |
| author_sort | Simon Lukato |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-19T12:30:49Z |
| format | Article |
| id | doaj.art-c68cc577d844479da4096552a1994b30 |
| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-12-19T12:30:49Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-c68cc577d844479da4096552a1994b302022-12-21T20:21:24ZengElsevierResults in Chemistry2211-71562021-01-013100150Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalatesSimon Lukato0Ola F. Wendt1Reine Wallenberg2Gabriel N. Kasozi3Betty Naziriwo4Axel Persson5Laura C. Folkers6Emmanuel Tebandeke7Department of Chemistry, College of Natural Sciences, Makerere University, P. O. Box 7062 Kampala, Uganda; Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 221 00 Lund, SwedenCentre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 221 00 Lund, SwedenCentre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 221 00 Lund, SwedenDepartment of Chemistry, College of Natural Sciences, Makerere University, P. O. Box 7062 Kampala, UgandaDepartment of Chemistry, College of Natural Sciences, Makerere University, P. O. Box 7062 Kampala, UgandaCentre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 221 00 Lund, SwedenCentre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 221 00 Lund, Sweden; Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Haeckelstrasse 3, 01069 Dresden, GermanyDepartment of Chemistry, College of Natural Sciences, Makerere University, P. O. Box 7062 Kampala, Uganda; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S2211715621000552Benzyl alcohols oxidationMolecular oxygenSilver-copper supported catalysts |
| spellingShingle | Simon Lukato Ola F. Wendt Reine Wallenberg Gabriel N. Kasozi Betty Naziriwo Axel Persson Laura C. Folkers Emmanuel Tebandeke Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates Results in Chemistry Benzyl alcohols oxidation Molecular oxygen Silver-copper supported catalysts |
| title | Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates |
| title_full | Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates |
| title_fullStr | Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates |
| title_full_unstemmed | Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates |
| title_short | Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates |
| title_sort | selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using ag cu catalysts supported on polyoxometalates |
| topic | Benzyl alcohols oxidation Molecular oxygen Silver-copper supported catalysts |
| url | http://www.sciencedirect.com/science/article/pii/S2211715621000552 |
| work_keys_str_mv | AT simonlukato selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT olafwendt selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT reinewallenberg selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT gabrielnkasozi selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT bettynaziriwo selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT axelpersson selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT lauracfolkers selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates AT emmanueltebandeke selectiveoxidationofbenzylalcoholswithmolecularoxygenastheoxidantusingagcucatalystssupportedonpolyoxometalates |