In this study, nanoporous gold (NPG) has been prepared by chemical de-alloying the Au based metallic glass precursor, Au 20 Cu 48 Ag 7 Pd 5 Si 20 (at.%), which was rapidly solidified from the melt in the form of ribbons. On the nanoporous gold, shape controlled gold nanostructures were electrodeposited by adjusting the applied potentials and deposition times. Using Rhodamine 6G (R6G) as probe molecule, the surface enhanced Raman scattering (SERS) activities with different Au nanostructures on nanoporous gold were compared. The electrodeposited Au dendritic nanostructures on NPG after 3000s exhibited strongest SERS effect and high reproducibility. Using this best SERS active substrate for melamine sensing, the detection limit of 10-7 M was achieved.
In this work, Pt nanoparticles were electrodeposited through cyclic voltammetry technique on three dimensional nanoporous gold, which was prepared by chemical de-alloying of Au-based metallic glass precursor in the form of ribbon. The electro-catalytic properties of the as-prepared samples were tested through potential cycling towards methanol oxidation in alkaline solution. Current density plots vs scan numbers indicate that the electrodes are active for the electro-oxidation of methanol and the Pt electrodeposited on gold ligaments contributes in increasing catalytic properties. In particular, results indicate that nanoporous gold with 30 cycles Pt electrodeposition exhibits competitive higher activity and longer durability towards methanol electro-oxidation.
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.