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Hydrogen permeability through Nd5.5W0.35Mo0.5Nb0.15O11.25-δ mixed protonic-electronic conducting membrane
- Chen, Yan, Liu, Hui, Zhuang, Libin, Wei, Yanying, Wang, Haihui
- Journal of membrane science 2019 v.579 pp. 33-39
- artificial membranes, carbon dioxide, hydrogen, permeability
- A new mixed protonic-electronic conducting material, Nd5.5W0.35Mo0.5Nb0.15O11.25-δ (NWMN), was developed by Nb-doping to improve the hydrogen permeability of Nd5.5W0.5Mo0.5O11.25-δ (NWM). The hydrogen permeation properties and stability of the NWMN were investigated in details. An enhanced hydrogen permeation flux through the NWMN membrane was achieved, which was about 2.5 times as high as that through the un-doped NWM membrane at 800 °C due to the increased ambipolar conductivity. Moreover, the phase structures of the NWMN powder and membrane remained unchanged after the treatment in pure CO2 and H2-containing atmospheres, respectively, which reveals excellent stability of the NWMN powder in CO2 and H2-containing atmospheres. The remarkable stability and improved hydrogen permeability make NWMN promising for the application of hydrogen separation.