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In situ reconstruction of multi-phase heterostructured anodes for efficient and durable solid oxide fuel cells
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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10
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Chemical Engineering Journal, Volume 500
Abstract
A high-performance anode of a solid oxide fuel cell (SOFC) should possess excellent electrocatalytic activity, high oxygen-ion/electron conductivity, and sufficient operational stability, thus requiring a delicate tuning of both the bulk and surface properties of the electrode materials. Constructing heterostructures to obtain high electrocatalytic activity catalysts is an essential but challenging research direction. Herein, a novel composite anode constructed with multiphase nanoparticles is rationally designed and prepared using intelligent in situ reconstruction technique. The self-assembled La0.9Ce0.1Ni0.7Co0.15Fe0.15O3-δ-Sm0.2Ce0.8O2 (LCNCF-SDC) anode was in situ reconstructed under reducing atmosphere to form uniform NiCoFe/CeO2/La2O3 multiphase heterostructures. As a result, the maximum power densities of a cell supported by 500 μm-thick Ce0.8Sm0.2O2-δ-carbonate electrolyte layer with the LCNCF-SDC anode reach 1.34 and 1.56 W cm−2 at 700 °C, respectively for using H2 and methanol as fuels. The synergy between multiphase nanoparticles contributes to the enhanced catalytic activity and stability. This anode demonstrates negligible degradation over 15 h in CH3OH, indicating a significantly enhanced coking resistance.
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Publisher Copyright: © 2024
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Gan, T, Sheng, B, Zeng, Q, Li, Y, Han, Y, Zhen, W, Li, P & Li, Y 2024, 'In situ reconstruction of multi-phase heterostructured anodes for efficient and durable solid oxide fuel cells', Chemical Engineering Journal, vol. 500, 157315. https://doi.org/10.1016/j.cej.2024.157315