Phosphine-Stabilized Ruthenium Nanoparticles: The Effect of the Nature of the Ligand in Catalysis

David González-Gálvez (1) , Pau Nolis (2) , Karine Philippot (3) , Bruno Chaudret (4) , Piet W N M van Leeuwen (1)

1 ICIQ - Institute of Chemical Research of Catalonia
2 Servei de Ressonància Magnètica Nuclear, Facultat de Ciències, Universitat Autònoma de Barcelona
3 LCC - Laboratoire de chimie de coordination
4 LPCNO - Laboratoire de physique et chimie des nano-objets

Various ligands not forming monometallic complexes were used for Ru nanoparticle stabilization, enabling the control of size, shape, and electronic properties. HRMAS NMR spectroscopy allowed us to study surface-bound molecules, evidencing ligand hydrogenation and decomposition of THFduring the RuNP synthesis. Catalysis studies underscore the importance of the nature of the ligands. The RuNPs were tested in the hydrogenation of aromatics, showing very high activities (TOF > 60 000 h–1, 40 bar, 393 K). A pronounced ligand effect was found, and dialkylaryl phosphine ligands gave the fastest catalyst.

Mots clés: ruthenium nanoparticles; ligand effect; HRMAS NMR; surface-bound molecules characterization; hydrogenation of aromatics

Domaines: Chimie de coordination

David González-Gálvez, Pau Nolis, Karine Philippot, Bruno Chaudret, Piet W N M van Leeuwen. Phosphine-Stabilized Ruthenium Nanoparticles: The Effect of the Nature of the Ligand in Catalysis. ACS Catalysis, 2012, 2 (3), pp.317-321. ⟨10.1021/cs200633k⟩. ⟨hal-02909838⟩