Abstract
NanoporousgoldwasformedbyelectrochemicalalloyinganddealloyingofgoldwithLiinanorganicelectrolyteatroomtemperature. After the electrochemical dealloying, fine pores were formed on the gold electrode. However, the total anodic charge (charges consumed for delithiation) was less than half of the total cathodic charge (charges consumed for lithiation). Inductively coupled plasma spectroscopy revealed that ∼20 at.% Li remained in the electrochemically dealloyed film. The remaining Li dominantly leached out of the film with an additional chemical dealloying in aqua regia. Consequently, a uniform nanoporous gold film with pore sizes of ∼30 nm was obtained.
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