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Synthesis and Evaluation of the A-Site Deficient Perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ as Fuel Electrode for High Temperature Co-Electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles

Amaya Dueñas, Diana María and Chen, Guoxing and Weidenkaff, Anke and Sata, Noriko and Han, Feng and Schiller, Guenter and Costa, Rémi and Friedrich, Andreas K. (2019):
Synthesis and Evaluation of the A-Site Deficient Perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ as Fuel Electrode for High Temperature Co-Electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles.
In: ECS Transactions, 91 (1), pp. 1751-1760. IOP Publishing, ISSN 1938-6737,
DOI: 10.1149/09101.1751ecst,
[Article]

Abstract

Lanthanum strontium chromite (LSC) perovskite partially doped with 15% of Ni on the B-site as reducible transition metal was investigated with the aim to perform in situ exsolution under reducing conditions. A-site deficient compounds were formulated to enhance the exsolution of the electrocatalyst. Single phase is achieved with the formulation La0.65Sr0.3Cr0.85Ni0.15O3-δ (L65SCN) and has been characterized by X-ray diffraction (XRD), Rietveld refinement and scanning electron microscopy (SEM). Exsolution was investigated under reducing conditions in which Ni exsolution was confirmed. Such electrocatalyst was implemented into an electrolyte-supported-cell (ESC) for early electrochemical investigation. Cells were manufactured by screen printing of composite L65SCN/CGO as fuel electrode and La0.58Sr0.4Fe0.8Co0.2O3-δ (LSCF) as air electrode on CGO-3YSZ-CGO substrates. These cells were characterized in steam electrolysis at 930°C by Electrochemical Impedance Spectroscopy (EIS). Further microstructural engineering and fine tuning of the manufacturing parameters are essential for a practical use of this electroctalyst for H2O/CO2 co-electrolysis operation.

Item Type: Article
Erschienen: 2019
Creators: Amaya Dueñas, Diana María and Chen, Guoxing and Weidenkaff, Anke and Sata, Noriko and Han, Feng and Schiller, Guenter and Costa, Rémi and Friedrich, Andreas K.
Title: Synthesis and Evaluation of the A-Site Deficient Perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ as Fuel Electrode for High Temperature Co-Electrolysis Enhanced by In Situ Exsolution of Ni Nanoparticles
Language: English
Abstract:

Lanthanum strontium chromite (LSC) perovskite partially doped with 15% of Ni on the B-site as reducible transition metal was investigated with the aim to perform in situ exsolution under reducing conditions. A-site deficient compounds were formulated to enhance the exsolution of the electrocatalyst. Single phase is achieved with the formulation La0.65Sr0.3Cr0.85Ni0.15O3-δ (L65SCN) and has been characterized by X-ray diffraction (XRD), Rietveld refinement and scanning electron microscopy (SEM). Exsolution was investigated under reducing conditions in which Ni exsolution was confirmed. Such electrocatalyst was implemented into an electrolyte-supported-cell (ESC) for early electrochemical investigation. Cells were manufactured by screen printing of composite L65SCN/CGO as fuel electrode and La0.58Sr0.4Fe0.8Co0.2O3-δ (LSCF) as air electrode on CGO-3YSZ-CGO substrates. These cells were characterized in steam electrolysis at 930°C by Electrochemical Impedance Spectroscopy (EIS). Further microstructural engineering and fine tuning of the manufacturing parameters are essential for a practical use of this electroctalyst for H2O/CO2 co-electrolysis operation.

Journal or Publication Title: ECS Transactions
Journal volume: 91
Number: 1
Publisher: IOP Publishing
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 20 May 2020 06:56
DOI: 10.1149/09101.1751ecst
Official URL: https://doi.org/10.1149/09101.1751ecst
Projects: The German Academic Exchange Service (DAAD) is acknowledged for the Ph.D. scholarship of Mrs. D.M. Amaya D., Part of this work has received support from the German Federal Ministry of Education and Research (BMBF) within the Kopernikus Project P2X (Grant n°03SFKE20).
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