Affiliation:
1. Guangdong Provincial Key Laboratory of New Energy Materials Service Safety Shenzhen Key Laboratory of Energy Electrocatalytic Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China
2. Dongguan Key Laboratory of Interdisciplinary Science for Advanced Materials and Large‐Scale Scientific Facilities School of Physical Sciences Great Bay University Dongguan Guangdong 523000 China
3. College of Materials Science and Engineering Fuzhou University Fuzhou 350108 China
Abstract
AbstractSr2Fe1.5Mo0.5O6‐δ (SFM) perovskite oxide is one of the most promising materials for solid oxide fuel cells (SOFCs) anode. However, the low catalytic activity is a major roadblock that obstructs its practical applications. Although in situ exsolution of B‐site metals is demonstrated as a promising approach to enhancing its performance, it can easily induce the co‐segregation of A‐site Sr, which seriously deteriorates the performance stability. In this work, the A‐site Sr element in SFM is partially replaced by Pr, while B‐site Mo is partially replaced by Ni. The in situ co‐exsolution of both FeNi alloy and PrOx nanoparticles on the reduced Pr0.8Sr1.2Fe1.5Mo0.3Ni0.2O6‐δ (R‐PSFMN) perovskite is successfully achieved. It is found that the peak power densities (Pmax) of the single cell using R‐PSFMN as the anode reaches as high as 2.29, 1.60, 1.07, and 0.67 W cm−2 in H2 atmosphere at the operating temperatures of 850, 800, 750 and 700 °C, respectively. Furthermore, it also exhibits excellent performance stability and anticoke properties when using ethane as fuel. The impregnation experiment further corroborates that the improved performance and stability are partly attributable to the contribution of PrOx nanoparticles, presenting a promising approach to enhance the electrochemical performance of SOFC perovskite anodes.
Funder
National Natural Science Foundation of China
Shenzhen Science and Technology Innovation Program