“…In fact, the hygroscopic nature of CaCl 2 31 and its hydrolysis in the presence of H 2 O could support the formation of protons in the electrolyte. At the same time, the addition of 30 wt% CaCl 2 not only lowered the liquidus temperature, 35 elevating the superheat of the melt at 110 °C, but also could result in an accelerated hydrolysis reaction and enhancing the activity of generated H + , thus the cathodic hydrogen evolution reaction. As shown in Fig.…”