Sr, Fe Co-doped Perovskite Oxides With High Performance for Oxygen Evolution Reaction

Developing efficient and earth-abundant electrocatalysts for the oxygen evolution reaction (OER) is still a big challenge. Here, perovskite La(0.4)Sr(0.6)Ni(0.5)Fe(0.5)O(3) nanoparticles were rationally designed and synthesized by the sol-gel method with an average size around 25 nm, and it has a re...

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Detalles Bibliográficos
Autores principales: Guo, Qiang, Li, Xiang, Wei, Haifei, Liu, Yi, Li, Lanlan, Yang, Xiaojing, Zhang, Xinghua, Liu, Hui, Lu, Zunming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6491708/
https://www.ncbi.nlm.nih.gov/pubmed/31069212
http://dx.doi.org/10.3389/fchem.2019.00224
Descripción
Sumario:Developing efficient and earth-abundant electrocatalysts for the oxygen evolution reaction (OER) is still a big challenge. Here, perovskite La(0.4)Sr(0.6)Ni(0.5)Fe(0.5)O(3) nanoparticles were rationally designed and synthesized by the sol-gel method with an average size around 25 nm, and it has a remarkable intrinsically activity and stability in 1 M KOH solution. Compared with other perovskite (LaNiO(3), LaFeO(3), and LaNi(0.5)Fe(0.5)O(3)) catalysts, La(0.4)Sr(0.6)Ni(0.5)Fe(0.5)O(3) exhibits superior OER performance, smaller tafel slope and lower overpotential. The high electrochemical performance of La(0.4)Sr(0.6)Ni(0.5)Fe(0.5)O(3) is attributed to its optimized e(g) filling (~1.2), as well as the excellent conductivity. This study demonstrates co-doping process is an effective way for increasing the intrinsic catalytic activity of the perovskite.

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