Herein, we report the successful application of hybrid Au-Ag nanoparticles (NPs) and nanochains (NCs) in the harvesting of visible light energy for selective hydrogenation reactions. For individual Au@Ag NPs with Au25 cores, the conversion and turnover frequency (TOF) are approximately 8 and 10 times higher than those of Au25 NPs, respectively. Notably, after the self-assembly of the Au@Ag NPs, the conversion and TOF of 1D NCs were approximately 2.5 and 2 times higher than those of isolated Au@Ag NPs, respectively, owing to the coupling of surface plasmon and the increase in the rate at which hot (energetic) electrons are generated with the formation of plasmonic hot spots between NPs. Furthermore, the surface-enhanced Raman scattering (SERS) activity of 1D Au@Ag NCs was strengthened by nearly 2 orders of magnitude.
The development of highly efficient metal-free carbon electrocatalysts for the oxygen reduction reaction (ORR) is one very promising strategy for the exploitation and commercialization of renewable and clean energy,but this still remains as ignificant challenge.H erein, we demonstrate afacile approach to prepare three-dimensional (3D) N-doped carbon with as p 3 /sp 2 carbon interface derived from ionic liquids via as imple pyrolysis process.T he tunable hybrid sp 3 and sp 2 carbon composition and pore structures stem from the transformation of ionic liquids to polymerizedo rganics and introduction of aC om etal salt. Through tuning both composition and pores,t he 3D N-doped nanocarbon with ah igh sp 3 /sp 2 carbon ratio on the surface exhibits as uperior electrocatalytic performance for the ORR compared to that of the commercial Pt/C in Zn-air batteries.D ensity functional theory calculations suggest that the improved ORR performance can be ascribed to the existence of Ndopants at the sp 3 / sp 2 carbon interface,w hichc an lower the theoretical overpotential of the ORR.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.