Schnur and Groß calculated the adsorption energy of the H-down and H-up water at several solids using an ice-like water bilayer model. The H-down and H-up configurations correspond to α w = 180° and α w = 0°, respectively. Their data show that 𝛿𝜇 ̃≈ 0 at Ru(0001), and 𝛿𝜇 ̃≈ 1 at Au(111), Ag(111), and Pt(111).