Hydrogen separation in La5.5WO11.25−δ membranes

Tungstates Ln6WO12 are proton conducting crystalline materials which show significant mixed protonic and electronic conductivity and stability in moist CO2 environments. These materials are promising candidates for hydrogen separation membranes at temperatures above 700 °C, especially when integrated in intensified processes as catalytic membrane reactors. From this family of compounds, La6−xWOy (0.4