Novel SrCo1-2x(Fe,Nb)xO3-δ (x=0.05, 0.10) oxides targeting CO2 capture and O2 enrichment: Structural stability and oxygen sorption properties

The novel Fe/Nb co-doped SrCo1-2x(Fe,Nb)(x)O3-delta (x = 0.05, 0.10) perovskite oxides were synthesized by the solid-state method. Structural and chemical stability of the SrCo1-2x( Fe,Nb)(x)O3-delta (x= 0.05, 0.10) oxides were studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and X-ray diffraction (XRD). The results demonstrated that the structural and chemical stability of the Fe/Nb co-doped SrCo1-2x(Fe,Nb)(x)O3-delta (x = 0.05, 0.10) is improved significantly. The oxygen sorption properties of the SrCo1-2x(Fe,Nb)(x)O3-delta (x = 0.05, 0.10) oxides were investigated between 300-900 degrees C in air, and the high oxygen sorption capacity of 11.5 and 10.3 mL O-2 (STP)/g oxide, respectively, are obtained. (C) 2011 Elsevier B.V. All rights reserved.