Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 282, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119553
Keywords
Solid oxide fuel cells; Perovskite anode; Carbon-tolerant; In-situ exsolution
Funding
- National Natural Science Foundation of China [21506012, 51802018]
- China Postdoctoral Science Foundation [2017M620642]
- Analysis and Testing Center, Beijing Institute of Technology, China
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This study introduces a novel anode material, Sr1.95Fe1.4Co0.1Mo0.5O6-δ (SFCoM), designed for intermediate-temperature solid oxide fuel cells (IT-SOFCs), which exhibits enhanced electrocatalytic activity and resistance to carbon deposition. By combining A-site defect regulation and B-site doping, the in-situ exsolved Co nanoparticle greatly improves the performance of the anode material, leading to promising potential for high-performance IT-SOFC anodes.
The development of high-catalytic-activity anode materials with carbon tolerance is an important research undertaking for the successful application of intermediate-temperature solid oxide fuel cells (IT-SOFCs). Herein, a novel anode material capable of in-situ exsolution of nanoparticles, Sr1.95Fe1.4Co0.1Mo0.5O6-delta (SFCoM), is designed and prepared from perovskite by a strategy combining A-site defect regulation and B-site doping. The electrocatalytic activity is greatly enhanced by the in-situ exsolved Co nanoparticle. The maximum power densities of a single cell with Co@SFCoM as the anode are 1.01 and 0.79 W cm(-2) when H-2 and C3H8, respectively, are used as the fuel at 750 degrees C. In addition, the Co@SFCoM anode exhibits excellent carbon-deposition resistance due to the synergistic effect of the Co nanoparticles and perovskite backbone. When C3H8 is used as the fuel, the anode material long-term operational stability over 200 h without performance degradation. Thus, our methodology represents a promising material design strategy for developing high-performance IT-SOFC anodes.
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