Nanostructured spinel Mn1.3Co1.3Cu0.4O4 as a bifunctional electrocatalyst for high-performance solid oxide electrochemical cells at intermediate temperatures

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Developing electrocatalysts with enhanced catalytic activities in oxygen reduction reactions (ORRs) and oxygen evolution reactions (OERs) is crucial for achieving high-performance solid oxide electrochemical cells (SOCs) at reduced temperatures. Herein, a nanostructured spinel Mn1.3Co1.3Cu0.4O4 (MCCO)-based bifunctional oxygen electrode is developed for the ORR and OER using an infiltration process. A uniform distribution and percolated network of MCCO on a Sc-stabilized ZrO2 (ScSZ) backbone without agglomeration is achieved by controlling the polymeric agent and catalyst loading. SOCs with the nanostructured MCCO-ScSZ electrode exhibited superior electrochemical performance of similar to 2.2 W/cm(2) in the fuel cell mode and similar to 1.4 A/cm(2) at 1.3 V in the electrolysis mode at 750 degrees C. To date, these results show the best performance for SOCs using spinel-based oxygen electrodes. Thus, our findings demonstrate that the nanoengineered MCCO catalyst has enormous potential as a bifunctional oxygen electrode for high-performance reversible SOCs at reduced temperatures.
Publisher
ELSEVIER
Issue Date
2022-08
Language
English
Article Type
Article
Citation

JOURNAL OF POWER SOURCES, v.539

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2022.231611
URI
http://hdl.handle.net/10203/297090
Appears in Collection
ME-Journal Papers(저널논문)
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