Crystal Structure and Properties of Gd1-xSrxCo1-yFeyO3-δ Oxides as Promising Materials for Catalytic and SOFC Application

A series of samples with the overall composition Gd1-xSrxCo1-yFeyO3-δ (x = 0.8; 0.9 and 0.1 ≤ y 0.9), which are promising materials for catalytic SOFC application, was prepared by a glycerol nitrate technique. X-ray diffraction analysis allowed to describe Gd0.2Sr0.8Co1-yFeyO3-δ 0.5 in tetragonal 2ap × 4ap superstructure (SG I4/mmm), while oxides 0.6 exhibit cubic disordered perovskite structure Pm-3m). All Gd0.1Sr0.9Fe1-yCoyO3-δ within range possess The structural parameters were refined using Rietveld full-profile method. changes oxygen content versus temperature determined thermogravimetric analysis. introduction iron into cobalt sublattice leads gradual increase unit cell volume, accompanied increasing content. dependency conductivity Gd0.2Sr0.8Co0.3Fe0.7O3-δ exhibits maximum (284 S/cm) at ≈600 K air. positive value Seebeck coefficient indicates predominant p-type complex oxide.