Journal
NANOSCALE
Volume 14, Issue 6, Pages 2482-2489Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr07286b
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Funding
- National Key R&D Program of China [2019YFC1905300]
- Projects of International Cooperation and Exchanges NSFC [21961142006]
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Atomically precise metal complexes, such as the Pt-2(S-Adam)(4)(PPh3)(2) complexes synthesized in this study, play a crucial role in controlled synthesis and catalytic applications. The crystal structure analysis revealed various packing modes of these complexes, and their UV-visible absorption spectra showed distinct absorption peaks. Moreover, these Pt complexes demonstrated high catalytic activity and selectivity in the propane dehydrogenation reaction.
As a bridge between single metal atoms and metal nanoclusters, atomically precise metal complexes are of great significance for controlled synthesis and catalytic applications at the atomic level. Herein, novel Pt-2(S-Adam)(4)(PPh3)(2) complexes were prepared via the conventional synthetic methods of metal nanoclusters. The atomically precise crystal structures of the binuclear Pt complexes with three kinds of packing modes in a unit cell were determined by X-ray crystallography. The two Pt atoms are bridged by two S atoms of thiolates, constructing a rhombus on a plane. Moreover, the ultraviolet visible absorption spectra of Pt-2(S-Adam)(4)(PPh3)(2) complexes show an apparent absorption peak centered at 454 nm. Furthermore, the Pt complexes were used as precursors to prepare catalysts for non-oxidative propane dehydrogenation. The as-prepared Pt-based catalysts with a particle size of approximately 1 nm demonstrated a propane conversion of about 18% and significantly enhanced selectivity for propylene, up to 93%. Our work will be beneficial to the basic understanding of platinum complexes, as well as the improvement of the catalytic dehydrogenation of propane.
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