Figure 3From: Catalytic activities of noble metal atoms on WO3 (001): nitric oxide adsorption Charge density difference for the most stable configurations of NO adsorption. NO molecule adsorbed on the (a) clean, (b) Cu-deposited, (c) Ag-deposited, and (d) Au-deposited WO3 (001) surfaces. The gain and loss of electrons are drawn in bright and dark colors with an isosurface of 0.005 e/Å3, respectively.Back to article page