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Smart Dual-Exsolved Self-Assembled Anode Enables Efficient and Robust Methane-Fueled Solid Oxide Fuel Cells.

ABSTRACT: Perovskite oxides have emerged as alternative anode materials for hydrocarbon-fueled solid oxide fuel cells (SOFCs). Nevertheless, the sluggish kinetics for hydrocarbon conversion hinder their commercial applications. Herein, a novel dual-exsolved self-assembled anode for CH4 -fueled SOFCs is developed. The designed Ru@Ru-Sr2 Fe1.5 Mo0.5 O6-δ (SFM)/Ru-Gd0.1 Ce0.9 O2-δ (GDC) anode exhibits a unique hierarchical structure of nano-heterointerfaces exsolved on submicron skeletons. As a result, the Ru@Ru-SFM/Ru-GDC anode-based single cell achieves high peak power densities of 1.03 and 0.63 W cm-2 at 800 °C under humidified H2 and CH4 , surpassing most reported perovskite-based anodes. Moreover, this anode demonstrates negligible degradation over 200 h in humidified CH4 , indicating high resistance to carbon deposition. Density functional theory calculations reveal that the created metal-oxide heterointerfaces of Ru@Ru-SFM and Ru@Ru-GDC have higher intrinsic activities for CH4 conversion compared to pristine SFM. These findings highlight a viable design of the dual-exsolved self-assembled anode for efficient and robust hydrocarbon-fueled SOFCs.

SUBMITTER: Hu F 

PROVIDER: S-EPMC10787062 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature

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Smart Dual-Exsolved Self-Assembled Anode Enables Efficient and Robust Methane-Fueled Solid Oxide Fuel Cells.

Hu Feng F   Chen Kongfa K   Ling Yihan Y   Huang Yonglong Y   Zhao Sunce S   Wang Sijiao S   Gui Liangqi L   He Beibei B   Zhao Ling L  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20231120 2

Perovskite oxides have emerged as alternative anode materials for hydrocarbon-fueled solid oxide fuel cells (SOFCs). Nevertheless, the sluggish kinetics for hydrocarbon conversion hinder their commercial applications. Herein, a novel dual-exsolved self-assembled anode for CH<sub>4</sub> -fueled SOFCs is developed. The designed Ru@Ru-Sr<sub>2</sub> Fe<sub>1.5</sub> Mo<sub>0.5</sub> O<sub>6-δ</sub> (SFM)/Ru-Gd<sub>0.1</sub> Ce<sub>0.9</sub> O<sub>2-δ</sub> (GDC) anode exhibits a unique hierarchica  ...[more]

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