TY - JOUR
T1 - Fe-Based Layered Double Perovskite Anode with in Situ Exsolved Nanoparticles for Direct Carbon Solid Oxide Fuel Cells
AU - Qiao, Jinshuo
AU - Chen, Xiangjun
AU - Ai, Chengyi
AU - Wang, Zhenhua
AU - Sun, Wang
AU - Sun, Kening
AU - Xu, Chunming
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2023/1/11
Y1 - 2023/1/11
N2 - Direct carbon solid oxide fuel cells (DC-SOFCs), which can efficiently convert chemical energy of carbonaceous fuels into electricity, have recently gained much research attention as they offer an effective way to address future economic and environmental challenges. Herein, B-site Ti-substituted (PrBa)0.95Fe2-xTixO6−δ (PBFTx, x = 0-0.3) materials are synthesized via a sol-gel combustion method and evaluated as anode materials for DC-SOFCs. Ti doping enhances the phase structure stability of the material under a reducing atmosphere. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses demonstrate the exsolution of metallic Fe nanoparticles on the surface of the PBFTx perovskite lattice after the materials are treated under a reducing atmosphere, which can improve the catalytic performance of DC-SOFC anode. Among the Ti-doped samples (x = 0.1-0.3), PBFT0.2 shows the largest adsorption capacity for CO and the highest electrical conductivity in air. Using pure nano-activated carbon as a fuel, the single cell supported by La0.9Sr0.1Ga0.8Mg0.2O3 electrolyte with PBFT0.2 as an anode achieves the maximum power densities of 527, 281, and 146 mW·cm-2 at 800, 750, and 700 °C, respectively. The above excellent performance of PBFT0.2 indicates that it has great potential for application in DC-SOFC anode.
AB - Direct carbon solid oxide fuel cells (DC-SOFCs), which can efficiently convert chemical energy of carbonaceous fuels into electricity, have recently gained much research attention as they offer an effective way to address future economic and environmental challenges. Herein, B-site Ti-substituted (PrBa)0.95Fe2-xTixO6−δ (PBFTx, x = 0-0.3) materials are synthesized via a sol-gel combustion method and evaluated as anode materials for DC-SOFCs. Ti doping enhances the phase structure stability of the material under a reducing atmosphere. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses demonstrate the exsolution of metallic Fe nanoparticles on the surface of the PBFTx perovskite lattice after the materials are treated under a reducing atmosphere, which can improve the catalytic performance of DC-SOFC anode. Among the Ti-doped samples (x = 0.1-0.3), PBFT0.2 shows the largest adsorption capacity for CO and the highest electrical conductivity in air. Using pure nano-activated carbon as a fuel, the single cell supported by La0.9Sr0.1Ga0.8Mg0.2O3 electrolyte with PBFT0.2 as an anode achieves the maximum power densities of 527, 281, and 146 mW·cm-2 at 800, 750, and 700 °C, respectively. The above excellent performance of PBFT0.2 indicates that it has great potential for application in DC-SOFC anode.
UR - http://www.scopus.com/inward/record.url?scp=85144749480&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.2c03660
DO - 10.1021/acs.iecr.2c03660
M3 - Article
AN - SCOPUS:85144749480
SN - 0888-5885
VL - 62
SP - 445
EP - 454
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 1
ER -