fig4

Figure 4. IL-STEM and corresponding elemental mapping images of Pt/TiWC before (upper panel) and after (bottom panel) the durability test. The white and orange arrows indicate particles with complete and incomplete Pt shells, respectively. Scale bars: (A) 5 nm and (B) 4 nm. (C) First CV curve at 2 mV/s in 0.1 M HClO₄ (upper panel) and the corresponding dissolution concentration (C) profiles of W (middle panel) and Pt (bottom panel) as a function of the applied potential^[63]. IL-STEM: Identical location scanning transmission electron microscopy.