Hollow ruthenium nanoparticles with small dimensions derived from Ni@Ru core@shell structure: synthesis and enhanced catalytic dehydrogenation of ammonia boraneElectronic supplementary information (ESI) available: Experimental procedures, TEM, XPS, EDS, and catalyst recyclability results of the as-prepared hollow Ru NPs. See DOI: 10.1039/c2cc33396a

Hollow Ru nanoparticles with 14 nm diameter and 2 nm shell thickness are reported for the first time, by removal of Ni from the delicately designed Ni@Ru core@shell NPs. Such hollow Ru NPs exhibit enhanced catalytic activity in the dehydrogenation of ammonia borane with respect to solid ones. Hollow Ru nanoparticles (NPs) are fabricated for the first time. Such hollow Ru NPs exhibit enhanced catalytic activity in the dehydrogenation of ammonia borane with respect to solid ones.