Zhao, Z.; Chen, G.; Escobar Cano, G.; Kißling, P.A.; Stölting, O. et al.: Multiplying Oxygen Permeability of a Ruddlesden-Popper Oxide by Orientation Control via Magnets. In: Angewandte Chemie International Edition 63 (2024), Nr. 8, e202312473. DOI: https://doi.org/10.1002/anie.202312473
Abstract: | |
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. | |
License of this version: | CC BY-NC-ND 4.0 Unported |
Document Type: | Article |
Publishing status: | publishedVersion |
Issue Date: | 2023 |
Appears in Collections: | Naturwissenschaftliche Fakultät |
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