Surface chemistry evolution in LnBaCo2O5 + δ double perovskites for oxygen electrodes

Helena Téllez; John Druce; Young Wan Ju; John Kilner; Tatsumi Ishihara

doi:10.1016/j.ijhydene.2014.06.102

Surface chemistry evolution in LnBaCo₂O_{5 + δ} double perovskites for oxygen electrodes

Helena Téllez, John Druce, Young Wan Ju, John Kilner, Tatsumi Ishihara

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

51 Citations (Scopus)

Abstract

The electro-catalytically active surfaces of mixed ionic electronic conductors (MIECs) are critically important for the operation of electrochemical devices such as solid oxide electrolyser cells (SOECs) and fuel cells (SOFCs). However, the composition and morphology of surfaces of real samples are often poorly characterized, and thus our understanding of the influence of these factors on the surface exchange reactions is rudimentary. In this work, we apply low energy ion scattering (LEIS) spectrometry and atomic force microscopy (AFM) to investigate the evolution of the surface composition and morphology of two layered perovskite type materials, showing the dynamic nature of these surfaces even at room temperature.

Original language	English
Pages (from-to)	20856-20863
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	35
DOIs	https://doi.org/10.1016/j.ijhydene.2014.06.102
Publication status	Published - Dec 3 2014

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

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10.1016/j.ijhydene.2014.06.102

Cite this

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title = "Surface chemistry evolution in LnBaCo2O5 + δ double perovskites for oxygen electrodes",

abstract = "The electro-catalytically active surfaces of mixed ionic electronic conductors (MIECs) are critically important for the operation of electrochemical devices such as solid oxide electrolyser cells (SOECs) and fuel cells (SOFCs). However, the composition and morphology of surfaces of real samples are often poorly characterized, and thus our understanding of the influence of these factors on the surface exchange reactions is rudimentary. In this work, we apply low energy ion scattering (LEIS) spectrometry and atomic force microscopy (AFM) to investigate the evolution of the surface composition and morphology of two layered perovskite type materials, showing the dynamic nature of these surfaces even at room temperature.",

author = "Helena T{\'e}llez and John Druce and Ju, {Young Wan} and John Kilner and Tatsumi Ishihara",

note = "Funding Information: The authors gratefully acknowledge the support of the International Institute for Carbon Neutral Energy Research (wpi-I 2 CNER), sponsored by the World Premier International Research Center Initiative (WPI), MEXT, Japan. Additionally, HT is funded by the JSPS Post-doctoral fellowship program and the Grant-in-Aid funding ( KAKENHI 25.03770 ). The authors also thank Mr. Matthew Sharp (Imperial College London) for providing the GBCO sample for the ageing study. Publisher Copyright: {\textcopyright} 2014 Hydrogen Energy Publications, LLC. All rights reserved.",

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AU - Téllez, Helena

AU - Druce, John

AU - Ju, Young Wan

AU - Kilner, John

AU - Ishihara, Tatsumi

N1 - Funding Information: The authors gratefully acknowledge the support of the International Institute for Carbon Neutral Energy Research (wpi-I 2 CNER), sponsored by the World Premier International Research Center Initiative (WPI), MEXT, Japan. Additionally, HT is funded by the JSPS Post-doctoral fellowship program and the Grant-in-Aid funding ( KAKENHI 25.03770 ). The authors also thank Mr. Matthew Sharp (Imperial College London) for providing the GBCO sample for the ageing study. Publisher Copyright: © 2014 Hydrogen Energy Publications, LLC. All rights reserved.

PY - 2014/12/3

Y1 - 2014/12/3

N2 - The electro-catalytically active surfaces of mixed ionic electronic conductors (MIECs) are critically important for the operation of electrochemical devices such as solid oxide electrolyser cells (SOECs) and fuel cells (SOFCs). However, the composition and morphology of surfaces of real samples are often poorly characterized, and thus our understanding of the influence of these factors on the surface exchange reactions is rudimentary. In this work, we apply low energy ion scattering (LEIS) spectrometry and atomic force microscopy (AFM) to investigate the evolution of the surface composition and morphology of two layered perovskite type materials, showing the dynamic nature of these surfaces even at room temperature.

AB - The electro-catalytically active surfaces of mixed ionic electronic conductors (MIECs) are critically important for the operation of electrochemical devices such as solid oxide electrolyser cells (SOECs) and fuel cells (SOFCs). However, the composition and morphology of surfaces of real samples are often poorly characterized, and thus our understanding of the influence of these factors on the surface exchange reactions is rudimentary. In this work, we apply low energy ion scattering (LEIS) spectrometry and atomic force microscopy (AFM) to investigate the evolution of the surface composition and morphology of two layered perovskite type materials, showing the dynamic nature of these surfaces even at room temperature.

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