Oxygen exchange-limited transport and surface activation of Ba0.5Sr0.5Co0.8Fe0.2O3−δ capillary membranes

▶ Oxygen transport through BSCF capillary is significantly limited by surface exchange. ▶ Activation with praseodymium oxide (PrOx) results in an increase in permeation. ▶ Activation leads to a change of limiting step for the oxygen transport. ▶ (Pr,Ba,Sr)(Co,Fe)O3−δ perovskites may be responsible for increase in permeation. ▶ BSCF capillary membranes demonstrate stable performance with time.