A particular case are alloy nanoparticles. Interesting for using a lower-price alloy material the forming skin of the noble metal often shows even a higher activity than the pure noble metal, for example, for d
Dealloying treatment is one way to make a Pt rich shell on Pt alloy through chemically depleting the surface of non-noble metals. However, this treatment usually causes more than half of the non-noble metal to be lost before the catalyst forms an effective protective surface. This process ...
Dealloying is a chemical or electrochemical process of the selective leaching of less noble element(s) from a binary or multicomponent alloy with noble element(s) in corrosive solution (acid or alkali normally), which is a simple and cost-effective way to produce nanoporous materials [11], [...
of molten metal as a dealloying agent. Fundamentally, LMD is based on the difference of mixing enthalpies between elements of the parent alloy and dealloying agent; in contrast, MSD depends on the redox potential difference between the constituents within the parent alloy in the molten salt ...
Most of the NWs-based SERS substrate fabrications have been carried out using either silver nanowires or silver-coated nanowire sur- faces6–10. For example, a reproducible SERS-based platform capable of bacteria detection was reported using silver nanoparticles (Ag NPs)-decorated silicon nanowires6...
Gold-silver alloy nanoparticles (NPs) capped with adenosine 5'-triphosphate were synthesized by borohydride reduction of dilute aqueous metal precursors. High-resolution transmission electron microscopy showed the as-synthesized particles to be spherical with average diameters ~4 nm. Optical properties were...
The galvanic replacement reaction between Ag nanoparticles and an aqueous HAuCl4 solution has recently been demonstrated as a simple and convenient route to metal nanostructures with hollow interiors and highly crystalline walls (see, for example, Sun, Y.; Mayers, B. T.; Xia, Y. Nano Lett. ...
Additionally, the presence of long axis enhances the light absorption process and their one dimension structure make them suitable for being modified superficially with the deposition of metal oxide nanoparticles as cocatalysts [18,22–25]. Na2Ti6O13 exhibits this particular structure and it has been...
The most common technique used to fabricate nanoporous metals is dealloying; it is to remove a less noble metal from an alloy in order to leave behind a highly porous skeleton of the noble metal [15–17]. Two phenomena take place during the dealloying process including (i) dissolution of ...