A Ce/Ru codoped SrFeO3−δ perovskite for a coke-resistant anode of a symmetrical solid oxide fuel cell
Abstract
Employment of identical oxides for the cathode and anode in a symmetrical solid oxide fuel cell (SSOFC) is beneficial for decreasing the fabrication costs of a robust cell. Ce doping on the A site of SrFeO3 increased the structural stability in a reducing atmosphere, but ceria was found to exsolve from the perovskite during the cooling process in the air if the doping level reached 20 atom %. The additional doping of 5 atom % Ru in Sr0.8Ce0.2FeO3 on the Fe site could prevent the ceria segregation in air and induce the surface decomposition under fuel conditions for the formation of nanoscale SrO, CeO2, and Ru0. The SSOFC with Ce/Ru codoped SrFeO3 on a Sr- and Mg-doped LaGaO3 electrolyte showed a small Rp value (0.12 Ω cm2) when H2 and ambient air were used as fuel and oxidant, respectively. The peak power densities of 846 and 310 mW cm–2 were achieved at 800°C using H2 and C3H8 as fuel, respectively. The excellent coke resistance of the anode could be related to the simultaneous in situ exsolution of CeO2, SrO, and Ru0 nanoparticles.
Citation
Li , B , He , S , Li , J , Yue , X , Irvine , J T S , Xie , D , Ni , J & Ni , C 2020 , ' A Ce/Ru codoped SrFeO 3−δ perovskite for a coke-resistant anode of a symmetrical solid oxide fuel cell ' , ACS Catalysis , vol. 10 , no. 24 , pp. 14398-14409 . https://doi.org/10.1021/acscatal.0c03554
Publication
ACS Catalysis
Status
Peer reviewed
ISSN
2155-5435Type
Journal article
Rights
Copyright © 2020 American Chemical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acscatal.0c03554
Description
This work was supported by the NSFC (Grants 51702264 and 41371275) and National Key Research and Development Program of China (Grant 2018FYD0200701) and research funding for central universities (Grant XDJK2020B066). B.L. acknowledges the Chongqing Graduate Scientific Research Innovation Project (Grant CYS20114). C.N. is also thankful for the Chongqing Bayu Young Scholar award from the Chongqing Teaching Committee.Collections
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