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Issue 38, 2017
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Tuning the separation performance of hydrogen permeable membranes using an anion doping strategy

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Abstract

Overcoming the dilemma between hydrogen permeability and stability is critical for realizing the widespread application of mixed protonic–electronic conducting (MPEC) membranes. Herein, fluoride-anion doping is for the first time reported for tuning the separation performance of MPEC membranes. Lanthanum tungstate oxyfluoride membranes, La5.5W0.6Mo0.4O11.25−δFx (x = 0, 0.025, 0.05, 0.10, 0.20, 0.50), exhibit improved hydrogen permeability and enhanced stability compared to their parent oxides, achieving a maximum value of 0.20 mL min−1 cm−2 at x = 0.05. Moreover, the declining hydrogen permeability performance of lanthanum tungstate MPEC membranes during high-temperature operation was systematically analyzed and relative solutions are put forward. The anion-doping and stability-improving strategies might accelerate the development and future practical applications of MPEC membranes.

Graphical abstract: Tuning the separation performance of hydrogen permeable membranes using an anion doping strategy

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Publication details

The article was received on 12 Jul 2017, accepted on 06 Sep 2017 and first published on 06 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA06030K
Citation: J. Mater. Chem. A, 2017,5, 20482-20490
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    Tuning the separation performance of hydrogen permeable membranes using an anion doping strategy

    L. Chen, L. Zhuang, J. Xue, Y. Wei and H. Wang, J. Mater. Chem. A, 2017, 5, 20482
    DOI: 10.1039/C7TA06030K

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