Fig. 5
From: Enhanced carbon dioxide electrolysis at redox manipulated interfaces

Different adsorption configurations of CO2 on the system. a, b The MnOx/Ni system. c, d The Ni–Cu/CeO2 system. e, f The Ni/TiO2 system (top: clean surfaces, bottom: defective surfaces, 1 and 4: side views, 2 and 5: top views, 3 and 6: contour plots of electronic charge density difference). Nickel in blue, copper in orange, cerium in silvery white, titanium in pale, manganese in purple, oxygen in red, and carbon in gray