In-situ STM study of phosphate adsorption on Cu(111), Au(111) and Cu/Au(111) electrodes

► In situ EC‐STM characterization of model systems for CO2 reduction ► Novell phosphate anion adsorbate layers on Au(111) and Cu(111) imaged ► Anion induced structural changes of ultrathin Copper films on Au(111). ► Amorphous copper film under strong cathodic conditions with indication for alloying