Control of crystallographic orientation in Ruddlesden-Popper for fast oxygen reduction

Gene Yang; Mohammad El Loubani; David Hill; Jong K. Keum; Dongkyu Lee

doi:10.1016/j.cattod.2022.04.022

Control of crystallographic orientation in Ruddlesden-Popper for fast oxygen reduction

Gene Yang, Mohammad El Loubani, David Hill, Jong K. Keum, Dongkyu Lee

Functional Hybrid Nanomaterials

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Designing oxide materials to achieve the high oxygen reduction reaction (ORR) activity is a key requirement to facilitate the development of energy and environmental applications. Manipulating the crystallographic planes of layered oxides has an impact on determining the electrocatalytic activity. However, the correlation between the ORR kinetics and the crystallographic orientations is not fully understood in a single material system. Here, a superconducting oxide, La_1.85Sr_0.15CuO_4-δ (LSC₂₁₄) is used to demonstrate that the crystallographic orientation plays a crucial role in controlling the ORR activity. The (114)-oriented epitaxial LSC₂₁₄ films show dramatically enhanced ORR activity up to two orders of magnitude compared to the (001)- and (103)-oriented LSC₂₁₄ films. We attribute the enhanced ORR activity of the LSC₂₁₄ films to both the exposed oxygen migration channels and the increased oxygen vacancies. Our study provides a new design strategy to enhance the ORR activity for high-performance energy applications and illustrates that the control of orientation is a simple means to tune the electrocatalytic activity.

Original language	English
Pages (from-to)	87-93
Number of pages	7
Journal	Catalysis Today
Volume	409
DOIs	https://doi.org/10.1016/j.cattod.2022.04.022
State	Published - Feb 1 2023

Funding

This research was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences , grant number DE-SC0021363 . HRXRD measurements were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility managed by Oak Ridge National Laboratory. This research was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, grant number DE-SC0021363. HRXRD measurements were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility managed by Oak Ridge National Laboratory.

Keywords

Crystallographic orientation engineering
Epitaxial thin films
LaSrCuO
Oxygen defects
Oxygen migration channels
Oxygen reduction reaction (ORR)
Pulse laser deposition
Solid oxide fuel cells (SOFCs)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.cattod.2022.04.022

Cite this

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title = "Control of crystallographic orientation in Ruddlesden-Popper for fast oxygen reduction",

abstract = "Designing oxide materials to achieve the high oxygen reduction reaction (ORR) activity is a key requirement to facilitate the development of energy and environmental applications. Manipulating the crystallographic planes of layered oxides has an impact on determining the electrocatalytic activity. However, the correlation between the ORR kinetics and the crystallographic orientations is not fully understood in a single material system. Here, a superconducting oxide, La1.85Sr0.15CuO4-δ (LSC214) is used to demonstrate that the crystallographic orientation plays a crucial role in controlling the ORR activity. The (114)-oriented epitaxial LSC214 films show dramatically enhanced ORR activity up to two orders of magnitude compared to the (001)- and (103)-oriented LSC214 films. We attribute the enhanced ORR activity of the LSC214 films to both the exposed oxygen migration channels and the increased oxygen vacancies. Our study provides a new design strategy to enhance the ORR activity for high-performance energy applications and illustrates that the control of orientation is a simple means to tune the electrocatalytic activity.",

keywords = "Crystallographic orientation engineering, Epitaxial thin films, LaSrCuO, Oxygen defects, Oxygen migration channels, Oxygen reduction reaction (ORR), Pulse laser deposition, Solid oxide fuel cells (SOFCs)",

author = "Gene Yang and {El Loubani}, Mohammad and David Hill and Keum, {Jong K.} and Dongkyu Lee",

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AU - Yang, Gene

AU - El Loubani, Mohammad

AU - Hill, David

AU - Keum, Jong K.

AU - Lee, Dongkyu

PY - 2023/2/1

Y1 - 2023/2/1

N2 - Designing oxide materials to achieve the high oxygen reduction reaction (ORR) activity is a key requirement to facilitate the development of energy and environmental applications. Manipulating the crystallographic planes of layered oxides has an impact on determining the electrocatalytic activity. However, the correlation between the ORR kinetics and the crystallographic orientations is not fully understood in a single material system. Here, a superconducting oxide, La1.85Sr0.15CuO4-δ (LSC214) is used to demonstrate that the crystallographic orientation plays a crucial role in controlling the ORR activity. The (114)-oriented epitaxial LSC214 films show dramatically enhanced ORR activity up to two orders of magnitude compared to the (001)- and (103)-oriented LSC214 films. We attribute the enhanced ORR activity of the LSC214 films to both the exposed oxygen migration channels and the increased oxygen vacancies. Our study provides a new design strategy to enhance the ORR activity for high-performance energy applications and illustrates that the control of orientation is a simple means to tune the electrocatalytic activity.

AB - Designing oxide materials to achieve the high oxygen reduction reaction (ORR) activity is a key requirement to facilitate the development of energy and environmental applications. Manipulating the crystallographic planes of layered oxides has an impact on determining the electrocatalytic activity. However, the correlation between the ORR kinetics and the crystallographic orientations is not fully understood in a single material system. Here, a superconducting oxide, La1.85Sr0.15CuO4-δ (LSC214) is used to demonstrate that the crystallographic orientation plays a crucial role in controlling the ORR activity. The (114)-oriented epitaxial LSC214 films show dramatically enhanced ORR activity up to two orders of magnitude compared to the (001)- and (103)-oriented LSC214 films. We attribute the enhanced ORR activity of the LSC214 films to both the exposed oxygen migration channels and the increased oxygen vacancies. Our study provides a new design strategy to enhance the ORR activity for high-performance energy applications and illustrates that the control of orientation is a simple means to tune the electrocatalytic activity.

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KW - Pulse laser deposition

KW - Solid oxide fuel cells (SOFCs)

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Control of crystallographic orientation in Ruddlesden-Popper for fast oxygen reduction

Abstract

Funding

Keywords

UN SDGs

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