fig2

Figure 2. Function diagrams of (A) O binding energies and (B) O-OH binding energies for different metals; Free energy diagrams of (C) oxygen reduction under different potentials and oxygen coverages, including the oxygen dissociation potential barrier, and (D) the oxygen peroxidation mechanism under low oxygen coverage of Au (111) and 1/2 oxygen coverage of Pt (111). A-D reproduced with permission from the American Chemical Society, copyright 2004^[56].