Benzyl Alcohol Oxidation Using Gold Catalysts Derived from Au Clusters on TiO
Catalysis Letters, ISSN: 1572-879X, Vol: 149, Issue: 2, Page: 449-455
2019
- 24Citations
- 14Captures
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Article Description
Abstract: Atomically-precise gold clusters have gained attraction in catalysis due to high fraction of low-coordinated gold atoms, unique structural geometry and ligand effect. Phosphine-ligated gold clusters offer an advantage in the light of the labile gold-phosphorous bond for easy ligand removal. Here, heterogeneous gold catalysts were prepared by depositing atomically-precise phosphine-ligated gold clusters, Au (PPh ) (NO ) onto anatase-phase TiO nanoparticles. The catalysts were then calcined under two different conditions: O (Au /TiO :O ) and O followed by H (Au /TiO :O –H ) at 200 °C, to dislodge phosphine ligands from the Au core. It was found that Au /TiO :O –H catalyst showed a decent catalytic activity in benzyl alcohol oxidation while Au /TiO and Au /TiO :O were completely inactive. Such results imply that small-size gold clusters (2–3 nm) alone do not always contribute to high catalytic activity of gold catalysts. It is suggested that the presence of NO species defines the catalytic activity of supported gold clusters in benzyl alcohol oxidation in the case of these catalysts and reinforces our initial claim in the previous work. Graphical Abstract: [Figure not available: see fulltext.].
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85057741656&origin=inward; http://dx.doi.org/10.1007/s10562-018-2625-8; http://link.springer.com/10.1007/s10562-018-2625-8; http://link.springer.com/content/pdf/10.1007/s10562-018-2625-8.pdf; http://link.springer.com/article/10.1007/s10562-018-2625-8/fulltext.html; https://dx.doi.org/10.1007/s10562-018-2625-8; https://link.springer.com/article/10.1007/s10562-018-2625-8
Springer Science and Business Media LLC
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