Journal
APPLIED ORGANOMETALLIC CHEMISTRY
Volume 36, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/aoc.6513
Keywords
magnetic separation; metal-support interaction; platinum catalyst; recyclability
Categories
Funding
- Doctoral Scientific-research Starting Fund of Hubei University of Technology [BSQD14007]
- National Natural Science Foundation of China [51703053]
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In this study, a core-shell structured support for Pt catalyst with a magnetic Fe3O4 core and a porous silica shell bearing amino groups was reported, showing high Pt loading and fraction of active Pt-0 species for a model hydrosilylation reaction. XPS analysis indicated that amino ligands played a dominant role in Pt loading and Fe2+ facilitated the formation of low valence Pt-0. The catalyst exhibited excellent recyclability due to the magnetic nature of the support and proper support-metal interactions.
Understanding the interaction between metal and the support is crucial in searching of efficient and recyclable noble metal heterogeneous catalysts. Herein, we report a core-shell structured support for Pt catalyst with a magnetic Fe3O4 core and a porous silica shell bearing amino groups. The prepared catalyst Fe3O4@mSiO(2)-APTES-Pt showed a high loading of Pt (7.93 wt%) as well as a high fraction of active Pt-0 species, which both contributed to the high activity toward a model hydrosilylation reaction between 1-octene and 1, 1, 1, 3, 5, 5, 5-heptamethyltrisiloxane (HMTS). X-ray photoelectron spectra (XPS) analysis revealed that the amino ligands played a dominant role in Pt loading and Fe2+ probably facilitated the formation of low valence Pt-0. Under the combined effect of magnetic nature of the support and proper support-metal interactions, the catalyst exhibited excellent recyclability with a recovery of 99.7% and a yield of over 90% even after eight runs of recycling. This catalyst may provide a new option in designing and preparing heterogeneous catalysts that are highly recoverable, reusable, and recyclable.
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