821916.fig.001a
(a)
821916.fig.001b
(b)
Figure 1: Electrochemical synthesis of nanostructured PdCo catalyst selectively on Au layer by (i) electrodeposition and (ii) dealloying. (a) Sponge-like nanoporous thin film and (b) nanoporous dendrites. Such three-dimensional porosity is beneficial in terms of diffusion inside.