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Keywords:

  • amorphous materials;
  • electrolytes;
  • fuel cells;
  • membranes;
  • metal oxides
Thumbnail image of graphical abstract

Nanometer-thick membranes of a large variety of silica-based double oxides commonly show gas-tightness (H2 and O2) and efficient proton conduction at 100–400 °C under dry atmosphere.