Considering the relatively short history, the achievement in
dealloyed nanoporous metals is very amazing. To date, based on
the understanding of the corrosion process, one can control the
dealloying process to prepare various nanoporous metals such as
hierarchical nanoporous metals, nanoporous metal-based composites
and nanoporous metals with different ligament/pore sizes and
compositions. For the simplicity, some representative/basic alloy
systems used for preparing nanoporous metals are listed in Table 1.