In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2022-02, No. 47 ( 2022-10-09), p. 1749-1749
Abstract:
The reducibility of B-site elements in perovskite (ABO 3 ) structures is one of the important factors that accelerate the in-situ exsolution of metallic nanocatalysts. Herein, a highly catalytically active and durable Pd-doped perovskite-based anode material (La 0.6 Sr 0.4 Co 0.15 Fe 0.8-x Pd x O 3- 𝛿 (LSCFP)) was developed for reversible SOCs. Under fuel electrode conditions, the LSCFP material is fully transformed into a stable Ruddlesden-Popper phase decorated with bimetallic Co-Fe nanocatalysts. Highly reducible Pd doping in the perovskite lattice effectively reduces the energy barrier for exsolution and formation of bimetallic catalysts on the electrode surface and promote phase transformation into the stable Ruddlesden-Popper-phase in the reducing atmosphere. The SOC with LSCFP fuel electrode yielded outstanding performances in both fuel cell and electrolysis cell modes at 850 °C, with remarkable reversible-cyclic stability. These results indicate that the novel LSCFP, which can simultaneously perform phase transition and bimetal exsolution under reducing conditions, is a very promising candidate as a bifunctional fuel electrode for reversible SOCs.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2022-02471749mtgabs
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2022
detail.hit.zdb_id:
2438749-6