  The interface between liquid water and the Pt(111) metal surface is
characterized structurally and thermodynamically via reactive molecular
dynamics (MD) simulations within the ReaxFF framework. The formation of a
distinct buckled adsorbate layer and subsequent wetting layers is tracked via
the course of the waters density as well as the distribution of the H2O
molecules with increasing distance to the metal surface. Hereby, also the Two
Phase Thermodynamics method (2PT) has been utilized for studying the course of
entropy as well as the translational, rotational and vibrational entropic
contributions throughout the Pt(111)/H2O interface. A significant reduction of
the entropy compared to the bulk value is observed in the adsorbate layer ($S$
= 31.05$\pm$2.48\,J/molK ) along with a density of 3.26$\pm$0.06g/cm$^{3}$. The
O-O interlayer distribution allows direct tracing of the water ordering and a
quantified comparison to the ideal hexagonal adlayer. While the adsorbate layer
at the Pt surface shows the occurrence of hexagonal motifs, this near-order is
already weakened in the wetting layers. Bulk behavior is reached at
15$\mathrm{\mathring{A}}$ distance from the Pt(111) metal. Introducing an
electric field of 0.1 V/$\mathrm{\mathring{A}}$ prolongs the ordering effect of
the metal surface into the liquid water.
