title: C-isolated Ag-C-Co sandwich sphere-nanostructures and their high activity catalysis induced by surface plasmon resonance.
abstract: Magnetic C-isolated Ag-C-Co sandwich sphere nanostructures have been fabricated through a synchronous growth and assembly process, in which the outer Co sphere-shells assemble around the surface of synchronously grown Ag-C sphere-cores. Raman and UV-vis absorption spectroscopy studies show that the covering of Co shell on Ag-C sphere cores weakens the surface-enhanced Raman scattering (SERS) and surface plasmon resonance (SPR) of Ag-C sphere cores. Owing to its ferromagnetic behaviour, the as-prepared C-isolated Ag-C-Co sandwich nanospheres can be easily separated and recycled by an external magnet field for application. Compared with Ag-Co, C-Co, and Co nanospheres of the same size, the resultant magnetic Ag-C-Co sandwich nanospheres exhibit markedly high catalytic activity toward ammonia borane hydrolytic dehydrogenation at atmospheric pressure and room temperature, which is induced by SPR from C-isolated sandwich structural and electronic synergistic effects.
authors.affiliation: Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhou
authors.forename: Ming
authors.initials: M
authors.lastname: Wen
authors.forename: Qingsheng
authors.initials: Q
authors.lastname: Wu