@article{Zhang2025, 
author = {Siyue Zhang and Yingnan Dou and Tian Xia and Liping Sun and Hui Zhao and Qiang Li},
title = {Achieving electrocatalytic activity toward oxygen reduction reaction based on Ruddlesden–Popper type cathode catalyst for solid oxide fuel cells},
year = {2025},
journal = {Journal of Advanced Ceramics},
volume = {14},
number = {11},
pages = {9221178},
keywords = {cathode material, oxygen reduction reaction (ORR), solid oxide fuel cells (SOFCs), Ruddlesden–Popper (RP)},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221178},
doi = {10.26599/JAC.2025.9221178},
abstract = {Ruddlesden‒Popper (R‒P) layered perovskite Sr3Fe2O7−δ (SFO) is considered a promising cathode catalyst for solid oxide fuel cells (SOFCs) because of its unique layered structure. However, its insufficient oxygen reduction reaction (ORR) activity at reduced temperatures leads to high polarization resistance, significantly degrading cell performance. This study introduces Nd-doped Sr2.9Nd0.1Fe2O7−δ (SNFO) as a candidate cathode material, focusing on its phase structure, oxygen desorption behavior, catalytic activity, and oxygen reduction reaction kinetics. At 700 °C, the SNFO catalyst delivers outstanding ORR activity, with a polarization resistance of 0.20 Ω·cm2 and a peak power density (PPD) of 803 mW·cm−2. Distribution of relaxation times (DRT) analysis revealed that the ORR kinetics of the SNFO cathode are primarily limited by the oxygen adsorption‒dissociation process. In addition, density functional theory (DFT) calculations demonstrate that SNFO has a lower oxygen vacancy formation energy, an enhanced O2 adsorption capacity, and optimized overall oxygen dissociation energetics. This study identifies SNFO as a promising cathode electrocatalyst for SOFCs.}
}