Rhenium (Re) nanoparticles have been synthesized by pulsed-laser decomposition of ammonium perrhenate (NH 4 ReO 4 ) or dirhenium decacarbonyl (Re 2 (CO) 10 ) in the presence of 3-mercaptopropionic acid (MPA) as capping agent, in both aqueous and organic media. Preliminary studies showed that the MPA-capped Re nanoparticles are capable of catalyzing the isomerization of 10-undecen-1-ol to internal alkenols via long chain migration of the CC double bond at ca. 200°C. A one-pot synthesis of graphite-coated Re nanoparticles has also been achieved by pulsed-laser decomposition of Re 2 (CO) 10 , due to photo-induced catalytic graphitization of the phenyl groups of PPh 3 on the surface of rhenium nanoparticles.