Table 2: Binding energy (BE) of OH (in eV) on several close-packed (111) model surfaces at 1/6 ML coverage.

PdPtPtML/PdPtML/Pd/PdIr2/PdPtML/PdIr2/Pd

BEOH (eV)−2.29−2.17−2.07−2.00−2.21

Zero of the energy scale corresponds to OH(g) and the respective metal slab at infinite separation from each other. PtML/Pd/PdIr2/Pd represents the synthesized annealed catalyst (PtMLPdIr) whereas PtML/PdIr2/Pd would be the expected catalyst without annealing (PtMLIrPd). The BE of OH on other relevant model systems is provided for comparison [58].