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Keywords:

  • gas separation;
  • membranes;
  • metal oxides;
  • oxygen permeation;
  • perovskites
Thumbnail image of graphical abstract

An important degradation mechanism of perovskite membranes is related to the operation-induced surface segregation of trace impurities of sulfur that appears to dramatically impact the low-temperature permeation behavior. A simple but remarkably effective method is reported that enables the low-temperature stabilization of the permeation flux in these perovskite membranes (see picture).