A NOVEL Ba/Nb CO-DOPED (Ba0.15Sr0.85)(Nb0.15Co0.85)O3-delta OXIDE AS AN OXYGEN ADSORBENT: STRUCTURAL AND OXYGEN SORPTION PROPERTIES

作者：Lu, Hui^*; Zhang, Yan

来源：Functional Materials Letters, 2010, 3(4): 275-278.

DOI：10.1142/S1793604710001408

• Perovskite oxide
• crystal structure
• structural stability
• oxygen sorption

The novel Ba/Nb co-doped (Ba0.15Sr0.85)(Nb0.15Co0.85)O3-delta oxide was synthesized by the solid-state reaction method. The (Ba0.15Sr0.85)(Nb0.15Co0.85)O3-delta oxide was studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and thermogravimetry (TG). The results demonstrate that the structural stability of the Ba/Nb co-doped (Ba0.15Sr0.85)(Nb0.15Co0.85)O3-delta was improved significantly compared to that of the Ba-doped SrCoO3-delta, in which a phase transformation occurred during the heating process. The incorporation of Nb5+ in the SrCoO3-delta-based oxides can significantly stabilize the neighboring oxygen octahedral, resulting in the improved stability of the (Ba0.15Sr0.85)(Nb0.15Co0.85)O3-delta. The oxygen sorption properties of (Ba0.15Sr0.85)(Nb(0.15)Co(0.8)5)O3-delta between 300 degrees C and 950 degrees C in air were investigated, and a high sorption capacity of 9.45 mL O-2(STP)/g oxide was obtained.

• 出版日期2010-12
• 单位河南城建学院; 河南工业大学