Design of an active site towards optimal electrocatalysis: overlayers, surface alloys and near-surface alloys of Cu/Pt(111).

Therefore,thedesign of the appropriate active site is crucial to obtain highcatalytic activity, especially where multi-functionality isneeded. However, the control of a given surface on anatom-by-atom basis is particularly challenging.The electrochemical oxidation of CO is the prototypicalbifunctional reaction.

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