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- W1565883035 abstract "La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) hollow fibres were prepared by a phase inversion/sintering method using polyetherimide as a binder. In order to overcome surface exchange kinetics limitation, LSCF hollow fibres were coated with ∼200 nm palladium (Pd) nanoparticles. The O2 flux of best performing membranes increased by up to 350% in comparison to unmodified LSCF hollow fibres. Optimal enhancement was achieved with a single Pd coating. Additional coatings resulted in reduced O2 fluxes, thus counter acting the beneficial spill-over effect of the catalyst. Long term stability testing in atmospheric air at 850 °C showed that a LSCF membrane modified with a single Pd coating continually outperformed a pure LSCF hollow fibre for over 400 h, though the level of enhancement was reduced over time. A dramatic reduction in performance of more than 45% occurred within the first 24 h of testing, which was attributed to the coalescence and aggregation of Pd catalyst particles to ∼1000 nm size at the LSCF grain boundaries. This greatly reduced the available area for the oxygen species to spill-over onto the LSCF surface and thus reduced the overall O2 flux." @default.
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- W1565883035 date "2011-09-01" @default.
- W1565883035 modified "2023-10-03" @default.
- W1565883035 title "Palladium surface modified La0.6Sr0.4Co0.2Fe0.8O3− hollow fibres for oxygen separation" @default.
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- W1565883035 doi "https://doi.org/10.1016/j.memsci.2011.07.008" @default.
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