Fig. 1: Pourbaix diagram of the Cu-Cl-H2O system.
From: Engineering the reversible redox electrochemistry on cuprous oxide for efficient chloride ion uptake

The calculation of Pourbaix diagram was carried based copper-related species in 0.6 M NaCl solution at 25 °C. Solid phases taken into consideration: Cu, Cu2O, CuCl, Cu(OH)2, Cu2(OH)3Cl.