Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction

The catalytic activity and stability of an iron-nickel based oxygen-deficient perovskite for the oxygen evolution reaction (OER) are drastically improved with the ppm additive of Fe ions to the alkaline electrolyte. The enhancement is attributed to a 1–2 nm restructured Ni(0.5)Fe(0.5)O(x)(OH)(2-x) (...

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Autores principales: Porokhin, Sergei V., Nikitina, Victoria A., Abakumov, Artem M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585416/
https://www.ncbi.nlm.nih.gov/pubmed/34771930
http://dx.doi.org/10.3390/ma14216403
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author Porokhin, Sergei V.
Nikitina, Victoria A.
Abakumov, Artem M.
author_facet Porokhin, Sergei V.
Nikitina, Victoria A.
Abakumov, Artem M.
author_sort Porokhin, Sergei V.
collection PubMed
description The catalytic activity and stability of an iron-nickel based oxygen-deficient perovskite for the oxygen evolution reaction (OER) are drastically improved with the ppm additive of Fe ions to the alkaline electrolyte. The enhancement is attributed to a 1–2 nm restructured Ni(0.5)Fe(0.5)O(x)(OH)(2-x) (oxy)hydroxide layer, as demonstrated with scanning transmission electron microscopy. La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) shows almost a four-fold increase in OER activity after Fe addition relative to the as-prepared pristine electrolyte, which demonstrates the low Tafel slope of 44 ± 2.4 mV dec(−1) and the superior intrinsic activity of 706 ± 71 A g(−1)(oxide) at 1.61 V vs. RHE.
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spelling pubmed-85854162021-11-12 Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction Porokhin, Sergei V. Nikitina, Victoria A. Abakumov, Artem M. Materials (Basel) Communication The catalytic activity and stability of an iron-nickel based oxygen-deficient perovskite for the oxygen evolution reaction (OER) are drastically improved with the ppm additive of Fe ions to the alkaline electrolyte. The enhancement is attributed to a 1–2 nm restructured Ni(0.5)Fe(0.5)O(x)(OH)(2-x) (oxy)hydroxide layer, as demonstrated with scanning transmission electron microscopy. La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) shows almost a four-fold increase in OER activity after Fe addition relative to the as-prepared pristine electrolyte, which demonstrates the low Tafel slope of 44 ± 2.4 mV dec(−1) and the superior intrinsic activity of 706 ± 71 A g(−1)(oxide) at 1.61 V vs. RHE. MDPI 2021-10-26 /pmc/articles/PMC8585416/ /pubmed/34771930 http://dx.doi.org/10.3390/ma14216403 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Porokhin, Sergei V.
Nikitina, Victoria A.
Abakumov, Artem M.
Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_full Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_fullStr Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_full_unstemmed Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_short Enhancement of Catalytic Activity and Stability of La(0.6)Ca(0.4)Fe(0.7)Ni(0.3)O(2.9) Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_sort enhancement of catalytic activity and stability of la(0.6)ca(0.4)fe(0.7)ni(0.3)o(2.9) perovskite with ppm concentration of fe in the electrolyte for the oxygen evolution reaction
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585416/
https://www.ncbi.nlm.nih.gov/pubmed/34771930
http://dx.doi.org/10.3390/ma14216403
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