Activation Energies in Surface Electron Transfer Reactions

5 ACTIVATION ENERGIES IN SURFACE ELECTRON TRANSFER REACTIONS 

FIGURE 11.8 Potential energy profiles for reducing one OH in the half-dissociated water network by a proton from the water layer at three different potentials. Inset shows the Brpnsted-Evans-Polanyi (BEP) relationship for the charge transfer process. The fine represents a fit to the data showing a transfer coefficient (y in Eq. 6.5) of 0.5. Adapted from Tripkovic et al. (2010). (See insert for color representation of the figure.) 

FIGURE 11.9 Scaling relations between adsorption energies of OH and OOH versus the O adsorption energy, (a) data for close-packed metal surfaces. Results where the solvation by HjO is included are compared to results with no solvation, (b) and (c) data of transition metal oxide surfaces. Adapted from Karlberg and Wahnstrbm (2005) and Rossmeisl et al. (2007). 

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