02.07.2026, Introduction： The electrochemical conversion of small gaseous molecules, such as H2O, H2, O2, N2 and CO2, has emerged as a promising strategy for energy storage and conversion reactions. Conventional aqueous electrolytes are limited, however, by the operation temperature at below 80 °C. A wide range of molten salts could significantly enlarge the operation temperature window ranging from around 150 to mor…