The electrocatalytic activity of metal catalysts commonly exhibits a positive linear correlation with the presence of steps, but this dependency breaks down for Pt catalysts with high step densities. Now, using in situ electrochemical scanning tunnelling microscopy, it is shown that this is due to the bunching of closely spaced steps, forming double and triple steps.
- Francesc Valls Mascaró
- Marc T. M. Koper
- Marcel J. Rost
