Metalloid phosphorus cation doping: An effective strategy to improve permeability and stability through the hydrogen permeable membranes

Metalloid element doping is a novel strategy to improve the properties of hydrogen permeable membranes. Herein, phosphorus doping was applied to enhance the hydrogen separation performance of lanthanum tungstate membrane for the first time. The effects of P content on the hydrogen permeability of La 5.5 W 0.6 Mo 0.4−x P x O 11.25−δ (x = 0, 0.05, 0.1, 0.2) membranes were firstly investigated under different temperatures. Among series of doped-membranes, La 5.5 W 0.6 Mo 0.35 P 0.05 O 11.25−δ exhibited increased hydrogen permeability and improved stability than the parent material due to higher protonic conductivity. The results showed that metalloid phosphorus element doping possesses a beneficial effect on the hydrogen separation performance, which could accelerate the development of the hydrogen permeable membranes and promote their practical applications.