Study of hydrogen permeation in (La5/6Nd1/6)5.5WO12-δ membranes

► (La5/6Nd1/6)5.5WO12-δ membranes allowed the selective H2 separation at high temperature. ► Feed and/or sweep gas humidification is required to activate proton transport. ► Above 800 ºC oxide-ion transport strongly contributes to the separation process.