Figure 2.
Schematic illustration of the formation of nanoporous gold film electrode by a multicyclic electrochemical alloying/de-alloying method. Step 1, electrodeposition of Zn and formation of Au-Zn alloy; step 2, electrochemical dealloying; step 3, electrodeposition of Zn and formation of Au-Zn alloy again; step 4, formation of nanoporous gold film after multicyclic alloying/de-alloying. Reprinted with permission from [15]. Copyright 2007, American Chemical Society.