Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction

Bae-Jung Kim*, Emiliana Fabbri, Daniel F Abbott, Xi Cheng, Adam H Clark, Maarten Nachtegaal, Mario Borlaf, Ivano E. Castelli, Thomas Graule, Thomas J Schmidt

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Perovskite oxides have been at the forefront among catalysts for the oxygen evolution reaction (OER) in alkaline media offering a higher degree of freedom in cation arrangement. Several highly OER active Co-based perovskites have been known to show extraordinary activities and stabilities when the B-site is partially occupied by Fe. At the current stage, the role of Fe in enhancing the OER activity and stability is still unclear. In order to elucidate the roles of Co and Fe in the OER mechanism of cubic perovskites, two prospective perovskite oxides, La0.2Sr0.8Co1- xFexO3-δ and Ba0.5Sr0.5Co1-xFexO3-δ with x = 0 and 0.2, were prepared by flame spray synthesis as nanoparticles. This study highlights the importance of Fe in order to achieve high OER activity and stability by drawing relations between their physicochemical and electrochemical properties. Ex situ and operando X-ray absorption spectroscopy (XAS) was used to study the local electronic and geometric structure under oxygen evolving conditions. In parallel, density function theory computational studies were conducted to provide theoretical insights into our findings. Our findings show that the incorporation of Fe into Co-based perovskite oxides alters intrinsic properties rendering efficient OER activity and prolonged stability.
Original languageEnglish
JournalJournal of the American Chemical Society
Volume141
Issue number13
Pages (from-to)5231-5240
ISSN0002-7863
DOIs
Publication statusPublished - 3 Apr 2019

Cite this

Kim, B-J., Fabbri, E., Abbott, D. F., Cheng, X., Clark, A. H., Nachtegaal, M., ... Schmidt, T. J. (2019). Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction. Journal of the American Chemical Society, 141(13), 5231-5240. https://doi.org/10.1021/jacs.8b12101
Kim, Bae-Jung ; Fabbri, Emiliana ; Abbott, Daniel F ; Cheng, Xi ; Clark, Adam H ; Nachtegaal, Maarten ; Borlaf, Mario ; Castelli, Ivano E. ; Graule, Thomas ; Schmidt, Thomas J. / Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction. In: Journal of the American Chemical Society. 2019 ; Vol. 141, No. 13. pp. 5231-5240.
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title = "Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction",
abstract = "Perovskite oxides have been at the forefront among catalysts for the oxygen evolution reaction (OER) in alkaline media offering a higher degree of freedom in cation arrangement. Several highly OER active Co-based perovskites have been known to show extraordinary activities and stabilities when the B-site is partially occupied by Fe. At the current stage, the role of Fe in enhancing the OER activity and stability is still unclear. In order to elucidate the roles of Co and Fe in the OER mechanism of cubic perovskites, two prospective perovskite oxides, La0.2Sr0.8Co1- xFexO3-δ and Ba0.5Sr0.5Co1-xFexO3-δ with x = 0 and 0.2, were prepared by flame spray synthesis as nanoparticles. This study highlights the importance of Fe in order to achieve high OER activity and stability by drawing relations between their physicochemical and electrochemical properties. Ex situ and operando X-ray absorption spectroscopy (XAS) was used to study the local electronic and geometric structure under oxygen evolving conditions. In parallel, density function theory computational studies were conducted to provide theoretical insights into our findings. Our findings show that the incorporation of Fe into Co-based perovskite oxides alters intrinsic properties rendering efficient OER activity and prolonged stability.",
author = "Bae-Jung Kim and Emiliana Fabbri and Abbott, {Daniel F} and Xi Cheng and Clark, {Adam H} and Maarten Nachtegaal and Mario Borlaf and Castelli, {Ivano E.} and Thomas Graule and Schmidt, {Thomas J}",
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Kim, B-J, Fabbri, E, Abbott, DF, Cheng, X, Clark, AH, Nachtegaal, M, Borlaf, M, Castelli, IE, Graule, T & Schmidt, TJ 2019, 'Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction', Journal of the American Chemical Society, vol. 141, no. 13, pp. 5231-5240. https://doi.org/10.1021/jacs.8b12101

Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction. / Kim, Bae-Jung; Fabbri, Emiliana; Abbott, Daniel F; Cheng, Xi; Clark, Adam H; Nachtegaal, Maarten; Borlaf, Mario; Castelli, Ivano E.; Graule, Thomas; Schmidt, Thomas J.

In: Journal of the American Chemical Society, Vol. 141, No. 13, 03.04.2019, p. 5231-5240.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction

AU - Kim, Bae-Jung

AU - Fabbri, Emiliana

AU - Abbott, Daniel F

AU - Cheng, Xi

AU - Clark, Adam H

AU - Nachtegaal, Maarten

AU - Borlaf, Mario

AU - Castelli, Ivano E.

AU - Graule, Thomas

AU - Schmidt, Thomas J

PY - 2019/4/3

Y1 - 2019/4/3

N2 - Perovskite oxides have been at the forefront among catalysts for the oxygen evolution reaction (OER) in alkaline media offering a higher degree of freedom in cation arrangement. Several highly OER active Co-based perovskites have been known to show extraordinary activities and stabilities when the B-site is partially occupied by Fe. At the current stage, the role of Fe in enhancing the OER activity and stability is still unclear. In order to elucidate the roles of Co and Fe in the OER mechanism of cubic perovskites, two prospective perovskite oxides, La0.2Sr0.8Co1- xFexO3-δ and Ba0.5Sr0.5Co1-xFexO3-δ with x = 0 and 0.2, were prepared by flame spray synthesis as nanoparticles. This study highlights the importance of Fe in order to achieve high OER activity and stability by drawing relations between their physicochemical and electrochemical properties. Ex situ and operando X-ray absorption spectroscopy (XAS) was used to study the local electronic and geometric structure under oxygen evolving conditions. In parallel, density function theory computational studies were conducted to provide theoretical insights into our findings. Our findings show that the incorporation of Fe into Co-based perovskite oxides alters intrinsic properties rendering efficient OER activity and prolonged stability.

AB - Perovskite oxides have been at the forefront among catalysts for the oxygen evolution reaction (OER) in alkaline media offering a higher degree of freedom in cation arrangement. Several highly OER active Co-based perovskites have been known to show extraordinary activities and stabilities when the B-site is partially occupied by Fe. At the current stage, the role of Fe in enhancing the OER activity and stability is still unclear. In order to elucidate the roles of Co and Fe in the OER mechanism of cubic perovskites, two prospective perovskite oxides, La0.2Sr0.8Co1- xFexO3-δ and Ba0.5Sr0.5Co1-xFexO3-δ with x = 0 and 0.2, were prepared by flame spray synthesis as nanoparticles. This study highlights the importance of Fe in order to achieve high OER activity and stability by drawing relations between their physicochemical and electrochemical properties. Ex situ and operando X-ray absorption spectroscopy (XAS) was used to study the local electronic and geometric structure under oxygen evolving conditions. In parallel, density function theory computational studies were conducted to provide theoretical insights into our findings. Our findings show that the incorporation of Fe into Co-based perovskite oxides alters intrinsic properties rendering efficient OER activity and prolonged stability.

U2 - 10.1021/jacs.8b12101

DO - 10.1021/jacs.8b12101

M3 - Journal article

VL - 141

SP - 5231

EP - 5240

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 13

ER -