Enhancement of Catalytic Activity and Stability of La0.6Ca0.4Fe0.7Ni0.3O2.9 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 Ni0.5F...

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Autores principales:	Sergei V. Porokhin, Victoria A. Nikitina, Artem M. Abakumov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	oxygen evolution reaction water splitting perovskite lattice oxygen mechanism Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
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spelling	oai:doaj.org-article:c16d394326dc432eb38953f7e34eb5dd2021-11-11T17:59:00ZEnhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction10.3390/ma142164031996-1944https://doaj.org/article/c16d394326dc432eb38953f7e34eb5dd2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6403https://doaj.org/toc/1996-1944The 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<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>x</sub>(OH)<sub>2-x</sub> (oxy)hydroxide layer, as demonstrated with scanning transmission electron microscopy. La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> 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<sup>−1</sup> and the superior intrinsic activity of 706 ± 71 A g<sup>−1</sup><sub>oxide</sub> at 1.61 V vs. RHE.Sergei V. PorokhinVictoria A. NikitinaArtem M. AbakumovMDPI AGarticleoxygen evolution reactionwater splittingperovskitelattice oxygen mechanismTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6403, p 6403 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	oxygen evolution reaction water splitting perovskite lattice oxygen mechanism Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	oxygen evolution reaction water splitting perovskite lattice oxygen mechanism Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Sergei V. Porokhin Victoria A. Nikitina Artem M. Abakumov Enhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
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<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>x</sub>(OH)<sub>2-x</sub> (oxy)hydroxide layer, as demonstrated with scanning transmission electron microscopy. La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> 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<sup>−1</sup> and the superior intrinsic activity of 706 ± 71 A g<sup>−1</sup><sub>oxide</sub> at 1.61 V vs. RHE.
format	article
author	Sergei V. Porokhin Victoria A. Nikitina Artem M. Abakumov
author_facet	Sergei V. Porokhin Victoria A. Nikitina Artem M. Abakumov
author_sort	Sergei V. Porokhin
title	Enhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_short	Enhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_full	Enhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_fullStr	Enhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> 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<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
title_sort	enhancement of catalytic activity and stability of la<sub>0.6</sub>ca<sub>0.4</sub>fe<sub>0.7</sub>ni<sub>0.3</sub>o<sub>2.9</sub> perovskite with ppm concentration of fe in the electrolyte for the oxygen evolution reaction
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c16d394326dc432eb38953f7e34eb5dd
work_keys_str_mv	AT sergeivporokhin enhancementofcatalyticactivityandstabilityoflasub06subcasub04subfesub07subnisub03subosub29subperovskitewithppmconcentrationoffeintheelectrolytefortheoxygenevolutionreaction AT victoriaanikitina enhancementofcatalyticactivityandstabilityoflasub06subcasub04subfesub07subnisub03subosub29subperovskitewithppmconcentrationoffeintheelectrolytefortheoxygenevolutionreaction AT artemmabakumov enhancementofcatalyticactivityandstabilityoflasub06subcasub04subfesub07subnisub03subosub29subperovskitewithppmconcentrationoffeintheelectrolytefortheoxygenevolutionreaction
_version_	1718431966608490496

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

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