2. Results and Discussion Click to copy section linkSection link copied! Ru NPs were synthesised by an organometallic approach, as seen in Figure 1 . A solution of the Ru precursor [Ru(cod)(cot)] (cod = 1,3-cyclooctadiene, cot = 1,3,5-cyclooctatriene) and the stabilizing ligand 2,2′-bipyridine in THF was hydrogenated under 3 bars of H 2 at room temperature. The resulting black dispersion was mixed with hexane to allow the sedimentation of the NPs, which were then isolated and dried under vacuum.