TY - JOUR

T1 - Multiplying Oxygen Permeability of a Ruddlesden-Popper Oxide by Orientation Control via Magnets

AU - Zhao, Zhijun

AU - Chen, Guoxing

AU - Escobar Cano, Giamper

AU - Kißling, Patrick A.

AU - Stölting, Oliver

AU - Breidenstein, Bernd

AU - Polarz, Sebastian

AU - Bigall, Nadja C.

AU - Weidenkaff, Anke

AU - Feldhoff, Armin

N1 - Funding Information: The authors thank Prof. Dr. Motohide Matsuda for his helpful suggestions on constructing the magnetic field, Dipl.‐Ing. Lorenz Gerdes for assistance in the pole figures measurements, M.Sc. Hannah Bronner for support in the mercury porosimetry measurements, and M. Sc. Mohamed Rasheed for preparing samples during the early stage of this work. This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, project number: 435833397). Open Access funding enabled and organized by Projekt DEAL.

PY - 2023

Y1 - 2023

N2 - Ruddlesden-Popper-type oxides exhibit remarkable chemical stability in comparison to perovskite oxides. However, they display lower oxygen permeability. We present an approach to overcome this trade-off by leveraging the anisotropic properties of Nd2NiO4+δ. Its (a,b)-plane, having oxygen diffusion coefficient and surface exchange coefficient several orders of magnitude higher than its c-axis, can be aligned perpendicular to the gradient of oxygen partial pressure by a magnetic field (0.81 T). A stable and high oxygen flux of 1.40 mL min−1 cm−2 was achieved for at least 120 h at 1223 K by a textured asymmetric disk membrane with 1.0 mm thickness under the pure CO2 sweeping. Its excellent operational stability was also verified even at 1023 K in pure CO2. These findings highlight the significant enhancement in oxygen permeation membrane performance achievable by adjusting the grain orientation. Consequently, Nd2NiO4+δ emerges as a promising candidate for industrial applications in air separation, syngas production, and CO2 capture under harsh conditions.

AB - Ruddlesden-Popper-type oxides exhibit remarkable chemical stability in comparison to perovskite oxides. However, they display lower oxygen permeability. We present an approach to overcome this trade-off by leveraging the anisotropic properties of Nd2NiO4+δ. Its (a,b)-plane, having oxygen diffusion coefficient and surface exchange coefficient several orders of magnitude higher than its c-axis, can be aligned perpendicular to the gradient of oxygen partial pressure by a magnetic field (0.81 T). A stable and high oxygen flux of 1.40 mL min−1 cm−2 was achieved for at least 120 h at 1223 K by a textured asymmetric disk membrane with 1.0 mm thickness under the pure CO2 sweeping. Its excellent operational stability was also verified even at 1023 K in pure CO2. These findings highlight the significant enhancement in oxygen permeation membrane performance achievable by adjusting the grain orientation. Consequently, Nd2NiO4+δ emerges as a promising candidate for industrial applications in air separation, syngas production, and CO2 capture under harsh conditions.

KW - Conducting Materials

KW - Magnetic Field

KW - Mixed Ionic Electronic Conducting Membranes

KW - Oxygen Separation

KW - Texture

UR - http://www.scopus.com/inward/record.url?scp=85179987436&partnerID=8YFLogxK

U2 - 10.1002/anie.202312473

DO - 10.1002/anie.202312473

M3 - Article

AN - SCOPUS:85179987436

VL - 63

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

SN - 1433-7851

IS - 8

M1 - e202312473

ER -