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Tuning the separation performance of hydrogen permeable membranes using an anion doping strategy.
- Source :
- Journal of Materials Chemistry A; 10/14/2017, Vol. 5 Issue 38, p20482-20490, 9p
- Publication Year :
- 2017
-
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, La<subscript>5.5</subscript>W<subscript>0.6</subscript>Mo<subscript>0.4</subscript>O<subscript>11.25−δ</subscript>F<subscript>x</subscript> (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<superscript>−1</superscript> cm<superscript>−2</superscript> 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 5
- Issue :
- 38
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 125465105
- Full Text :
- https://doi.org/10.1039/c7ta06030k