Synthesis of bimetallic nanostructures on a sacrificial silver nanotemplate by galvanic replacement. Review.

The current state of research on the formation of bimetallic nanostructures by galvanic replacement is presented. The effectiveness of galvanic replacement for the controlled synthesis of Au/Ag, Pd/Ag, and Pt/Ag on a silver nanotemplate in aqueous solutions is shown. The features of morphological and structural transformations of sacrificial nanosilver at various replacement stages are discussed. The dependencies of the geometry and composition of Au/Ag, Pd/Ag, and Pt/Ag nanostructures on the main parameters of galvanic replacement – such as the nature and concentration of the reducible metal ions, the ratio between the silver nanotemplate and the metal precursor, the duration of the process, and the temperature – are analysed. Accents are made on a comprehensive approach to their influence for the controlled synthesis of Au/Ag, Pd/Ag, and Pt/Ag nanostructures with predetermined characteristics.