Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability

Bae-Jung Kim*, Emiliana Fabbri, Ivano E. Castelli, Mario Borlaf, Thomas Graule, Maarten Nachtegaal, Thomas J. Schmidt

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Perovskite oxides have been gaining attention for its capability to be designed as an ideal electrocatalyst for oxygen evolution reaction (OER). Among promising candidates, the layered double perovskite PrBaCo2O6-δ (PBC)has been identified as the most active perovskite electrocatalyst for OER in alkaline media. For a single transition metal oxide catalyst, the addition of Fe enhances its electrocatalytic performance towards OER. To understand the role of Fe, herein, Fe is incorporated in PBC in different ratios, which yielded PrBaCo2(1-x)Fe2xCo6-δ (x = 0, 0.2 and 0.5). Fe-doped PBCF's demonstrate enhanced OER activities and stabilities. Operando X-ray absorption spectroscopy (XAS) revealed that Co is more stable in a lower oxidation state upon Fe incorporation by establishing charge stability. Hence, the degradation of Co is inhibited such that the perovskite structure is prolonged under the OER conditions, which allows it to serve as a platform for the oxy(hydroxide) layer formation. Overall, our findings underline synergetic effects of incorporating Fe into Co-based layered double perovskite in achieving a higher activity and stability during oxygen evolution reaction.
Original languageEnglish
Article number263
JournalCatalysts
Volume9
Issue number3
Number of pages17
ISSN2073-4344
DOIs
Publication statusPublished - 2019

Keywords

  • Fe-substitution
  • Operando X-ray absorption spectroscopy
  • Oxygen evolution reaction
  • Double perovskite catalysts
  • Oxy(hydroxide)

Cite this

Kim, Bae-Jung ; Fabbri, Emiliana ; Castelli, Ivano E. ; Borlaf, Mario ; Graule, Thomas ; Nachtegaal, Maarten ; Schmidt, Thomas J. / Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability. In: Catalysts. 2019 ; Vol. 9, No. 3.
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title = "Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability",
abstract = "Perovskite oxides have been gaining attention for its capability to be designed as an ideal electrocatalyst for oxygen evolution reaction (OER). Among promising candidates, the layered double perovskite PrBaCo2O6-δ (PBC)has been identified as the most active perovskite electrocatalyst for OER in alkaline media. For a single transition metal oxide catalyst, the addition of Fe enhances its electrocatalytic performance towards OER. To understand the role of Fe, herein, Fe is incorporated in PBC in different ratios, which yielded PrBaCo2(1-x)Fe2xCo6-δ (x = 0, 0.2 and 0.5). Fe-doped PBCF's demonstrate enhanced OER activities and stabilities. Operando X-ray absorption spectroscopy (XAS) revealed that Co is more stable in a lower oxidation state upon Fe incorporation by establishing charge stability. Hence, the degradation of Co is inhibited such that the perovskite structure is prolonged under the OER conditions, which allows it to serve as a platform for the oxy(hydroxide) layer formation. Overall, our findings underline synergetic effects of incorporating Fe into Co-based layered double perovskite in achieving a higher activity and stability during oxygen evolution reaction.",
keywords = "Fe-substitution, Operando X-ray absorption spectroscopy, Oxygen evolution reaction, Double perovskite catalysts, Oxy(hydroxide)",
author = "Bae-Jung Kim and Emiliana Fabbri and Castelli, {Ivano E.} and Mario Borlaf and Thomas Graule and Maarten Nachtegaal and Schmidt, {Thomas J.}",
year = "2019",
doi = "10.3390/catal9030263",
language = "English",
volume = "9",
journal = "Catalysts",
issn = "2073-4344",
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Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability. / Kim, Bae-Jung; Fabbri, Emiliana; Castelli, Ivano E.; Borlaf, Mario; Graule, Thomas; Nachtegaal, Maarten; Schmidt, Thomas J.

In: Catalysts, Vol. 9, No. 3, 263, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability

AU - Kim, Bae-Jung

AU - Fabbri, Emiliana

AU - Castelli, Ivano E.

AU - Borlaf, Mario

AU - Graule, Thomas

AU - Nachtegaal, Maarten

AU - Schmidt, Thomas J.

PY - 2019

Y1 - 2019

N2 - Perovskite oxides have been gaining attention for its capability to be designed as an ideal electrocatalyst for oxygen evolution reaction (OER). Among promising candidates, the layered double perovskite PrBaCo2O6-δ (PBC)has been identified as the most active perovskite electrocatalyst for OER in alkaline media. For a single transition metal oxide catalyst, the addition of Fe enhances its electrocatalytic performance towards OER. To understand the role of Fe, herein, Fe is incorporated in PBC in different ratios, which yielded PrBaCo2(1-x)Fe2xCo6-δ (x = 0, 0.2 and 0.5). Fe-doped PBCF's demonstrate enhanced OER activities and stabilities. Operando X-ray absorption spectroscopy (XAS) revealed that Co is more stable in a lower oxidation state upon Fe incorporation by establishing charge stability. Hence, the degradation of Co is inhibited such that the perovskite structure is prolonged under the OER conditions, which allows it to serve as a platform for the oxy(hydroxide) layer formation. Overall, our findings underline synergetic effects of incorporating Fe into Co-based layered double perovskite in achieving a higher activity and stability during oxygen evolution reaction.

AB - Perovskite oxides have been gaining attention for its capability to be designed as an ideal electrocatalyst for oxygen evolution reaction (OER). Among promising candidates, the layered double perovskite PrBaCo2O6-δ (PBC)has been identified as the most active perovskite electrocatalyst for OER in alkaline media. For a single transition metal oxide catalyst, the addition of Fe enhances its electrocatalytic performance towards OER. To understand the role of Fe, herein, Fe is incorporated in PBC in different ratios, which yielded PrBaCo2(1-x)Fe2xCo6-δ (x = 0, 0.2 and 0.5). Fe-doped PBCF's demonstrate enhanced OER activities and stabilities. Operando X-ray absorption spectroscopy (XAS) revealed that Co is more stable in a lower oxidation state upon Fe incorporation by establishing charge stability. Hence, the degradation of Co is inhibited such that the perovskite structure is prolonged under the OER conditions, which allows it to serve as a platform for the oxy(hydroxide) layer formation. Overall, our findings underline synergetic effects of incorporating Fe into Co-based layered double perovskite in achieving a higher activity and stability during oxygen evolution reaction.

KW - Fe-substitution

KW - Operando X-ray absorption spectroscopy

KW - Oxygen evolution reaction

KW - Double perovskite catalysts

KW - Oxy(hydroxide)

U2 - 10.3390/catal9030263

DO - 10.3390/catal9030263

M3 - Journal article

VL - 9

JO - Catalysts

JF - Catalysts

SN - 2073-4344

IS - 3

M1 - 263

ER -