TY - JOUR
T1 - Turning A-site deficient concentration of (Ba0.5Sr0.5)1-xCo0.7Fe0.2Ni0.1O3-δ perovskite membrane for oxygen separation
AU - Tan, Jinkun
AU - Zhang, Zhicheng
AU - Gu, Zhenbin
AU - Zhou, Wanglin
AU - Liu, Zhengkun
AU - Zhang, Guangru
AU - Jin, Wanqin
N1 - Publisher Copyright:
© 2024
PY - 2024/10/1
Y1 - 2024/10/1
N2 - The A-site deficient perovskites bring more space for materials design and surface engineering in many fields. In this work, a series of (Ba0.5Sr0.5)1-xCo0.7Fe0.2Ni0.1O3-δ (BSCFN) membranes with Ni-substitution and different A-site deficient concentrations were designed to improve the oxygen permeability. The influence of A-site deficient concentration and sintered temperature on the microstructure, oxygen permeability, and stability of BSCFN were investigated. The results show that NiO aggregation happens on the membrane surface which surprisingly accelerates the surface exchange reactions of oxygen. Among the series of BSCFN membranes, BSCFN-2–1140 exhibits the highest oxygen permeation flux of 2.36 mL min−1 cm−2 at 900 °C, which is 1.87 times higher than that of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF). Furthermore, the long-term stability test lasted over 400 h without degradation. Our work demonstrates the feasibility of the A-site deficient strategy and surface nanostructure engineering for oxygen separation and catalytic membrane reactors.
AB - The A-site deficient perovskites bring more space for materials design and surface engineering in many fields. In this work, a series of (Ba0.5Sr0.5)1-xCo0.7Fe0.2Ni0.1O3-δ (BSCFN) membranes with Ni-substitution and different A-site deficient concentrations were designed to improve the oxygen permeability. The influence of A-site deficient concentration and sintered temperature on the microstructure, oxygen permeability, and stability of BSCFN were investigated. The results show that NiO aggregation happens on the membrane surface which surprisingly accelerates the surface exchange reactions of oxygen. Among the series of BSCFN membranes, BSCFN-2–1140 exhibits the highest oxygen permeation flux of 2.36 mL min−1 cm−2 at 900 °C, which is 1.87 times higher than that of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF). Furthermore, the long-term stability test lasted over 400 h without degradation. Our work demonstrates the feasibility of the A-site deficient strategy and surface nanostructure engineering for oxygen separation and catalytic membrane reactors.
KW - A-site deficient perovskite
KW - Oxygen separation
KW - Perovskite oxide membrane
KW - Surface nanostructure engineering
UR - http://www.scopus.com/inward/record.url?scp=85189686638&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2024.127373
DO - 10.1016/j.seppur.2024.127373
M3 - 文章
AN - SCOPUS:85189686638
SN - 1383-5866
VL - 345
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 127373
ER -