Abstract
A series of perovskite-type oxygen transport membranes (OTM) of Pr0.6Sr0.4Fe1-xWxO3-δ (PSFWx, x = 0, 0.1) were synthesized by sol-gel method. The effects of W doping on the microstructure, chemical stability, and water splitting performance were investigated systematically. With the increase of W doping level, the valence of Fe reduced, which improves chemical stability in reducing atmosphere but decreases the oxygen permeability. The results indicated that the relative content of Fe+3/Fe+4 remained unchanged before and after water splitting experiment, which attributed to the increase of metal oxygen average binding energy (ABE). Furthermore, at long-term water splitting test, the hydrogen production rate of membrane PSF decreased about 10%, but membrane PSFW0.1 almost remained stable and showed good chemical stability, which made it promising for hydrogen production from water splitting.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 51674164, 51874196, 51574163), the Iron and Steel Joint Research Fund of National Natural Science Foundation and China Baowu Steel Group Corp. Ltd (U1860203) and CSA Interdisciplinary Innovation Team.
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Liu, Y. et al. (2020). Enhanced Stability of B-Site W Doped Pr0.6Sr0.4Fe1-xWxO3-δ Ceramic Membranes for Water Splitting. In: TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36296-6_61
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DOI: https://doi.org/10.1007/978-3-030-36296-6_61
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