Synthesis and characterization of B-site doped La0.20Sr0.25Ca0.45TiO3 as SOFC anode materials

Azra Yaqub; Naveed Janjua; Cristian Daniel Savaniu; John Thomas Sirr Irvine

doi:10.1016/j.ijhydene.2014.08.083

Synthesis and characterization of B-site doped La_0.20Sr_0.25Ca_0.45TiO₃ as SOFC anode materials

Azra Yaqub, Naveed Janjua, Cristian Daniel Savaniu, John Thomas Sirr Irvine

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

Abstract

In this paper, B-site doping of an optimized A-site deficient composition, calcium-doped lanthanum strontium titanate, La_0.2Sr_0.25Ca_0.45TiO₃ (LSCT_A−) with Ni and Fe is presented. The doped compositions were successfully synthesized by the Pechini method and then characterized by XRD, SEM, dilatometry, ac impedance, and dc conductivity. The doped analogues preserved the orthorhombic symmetry of the parent, LSCT_A−. The observed dilatometric results were correlated with the particle size. Ac impedance studies revealed their semi-conducting behaviour in air. Furthermore, the doped compositions showed higher conductivity values in reducing atmosphere. Compared to bare pre reduced LSCT_A− having conductivity of 38 S cm⁻¹, the pre reduced 5% Ni doped LSCT_A− (LSCTN5) and 5% Fe doped LSCT_A− (LSCTF5) showed conductivity values of 47 S cm⁻¹ and 66 S cm⁻¹ at 880 °C, respectively. B-site doping could affect the electrical and catalytic properties of LSCT_A− materials making them viable alternatives for fuel cell applications.

Original language	English
Pages (from-to)	760-766
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	40
Issue number	1
Early online date	10 Sept 2014
DOIs	https://doi.org/10.1016/j.ijhydene.2014.08.083
Publication status	Published - 5 Jan 2015

Keywords

B-site doping
Dc conductivity
Anode material
Fuel cell

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10.1016/j.ijhydene.2014.08.083

Irvine_2014_IJHE_Synthesis_AM
Copyright © 2014 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Hydrogen Energy, 40(1), 2014, http://dx.doi.org/10.1016/j.ijhydene.2014.08.083
Accepted author manuscript, 471 KB

Energy Materials Discovery: Energy Materials Discovery Characterisation and Application
Irvine, J. T. S. (PI), Cassidy, M. (CoI), Connor, P. A. (CoI), Savaniu, C. D. (CoI) & Zhou, W. (CoI)
EPSRC
7/01/13 → 6/01/18
Project: Standard

Cite this

@article{20f57c187da7467ca04b01cddd132e64,

title = "Synthesis and characterization of B-site doped La0.20Sr0.25Ca0.45TiO3 as SOFC anode materials",

abstract = "In this paper, B-site doping of an optimized A-site deficient composition, calcium-doped lanthanum strontium titanate, La0.2Sr0.25Ca0.45TiO3 (LSCTA−) with Ni and Fe is presented. The doped compositions were successfully synthesized by the Pechini method and then characterized by XRD, SEM, dilatometry, ac impedance, and dc conductivity. The doped analogues preserved the orthorhombic symmetry of the parent, LSCTA−. The observed dilatometric results were correlated with the particle size. Ac impedance studies revealed their semi-conducting behaviour in air. Furthermore, the doped compositions showed higher conductivity values in reducing atmosphere. Compared to bare pre reduced LSCTA− having conductivity of 38 S cm−1, the pre reduced 5% Ni doped LSCTA− (LSCTN5) and 5% Fe doped LSCTA− (LSCTF5) showed conductivity values of 47 S cm−1 and 66 S cm−1 at 880 °C, respectively. B-site doping could affect the electrical and catalytic properties of LSCTA− materials making them viable alternatives for fuel cell applications.",

keywords = "B-site doping, Dc conductivity, Anode material, Fuel cell",

author = "Azra Yaqub and Naveed Janjua and Savaniu, {Cristian Daniel} and Irvine, {John Thomas Sirr}",

note = "Research made possible by the Engineering and Physical Sciences Research Council Platform Grant (EPSRC Platform Grant number EP/K006800/1). ",

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doi = "10.1016/j.ijhydene.2014.08.083",

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AU - Janjua, Naveed

AU - Savaniu, Cristian Daniel

AU - Irvine, John Thomas Sirr

N1 - Research made possible by the Engineering and Physical Sciences Research Council Platform Grant (EPSRC Platform Grant number EP/K006800/1).

PY - 2015/1/5

Y1 - 2015/1/5

N2 - In this paper, B-site doping of an optimized A-site deficient composition, calcium-doped lanthanum strontium titanate, La0.2Sr0.25Ca0.45TiO3 (LSCTA−) with Ni and Fe is presented. The doped compositions were successfully synthesized by the Pechini method and then characterized by XRD, SEM, dilatometry, ac impedance, and dc conductivity. The doped analogues preserved the orthorhombic symmetry of the parent, LSCTA−. The observed dilatometric results were correlated with the particle size. Ac impedance studies revealed their semi-conducting behaviour in air. Furthermore, the doped compositions showed higher conductivity values in reducing atmosphere. Compared to bare pre reduced LSCTA− having conductivity of 38 S cm−1, the pre reduced 5% Ni doped LSCTA− (LSCTN5) and 5% Fe doped LSCTA− (LSCTF5) showed conductivity values of 47 S cm−1 and 66 S cm−1 at 880 °C, respectively. B-site doping could affect the electrical and catalytic properties of LSCTA− materials making them viable alternatives for fuel cell applications.

AB - In this paper, B-site doping of an optimized A-site deficient composition, calcium-doped lanthanum strontium titanate, La0.2Sr0.25Ca0.45TiO3 (LSCTA−) with Ni and Fe is presented. The doped compositions were successfully synthesized by the Pechini method and then characterized by XRD, SEM, dilatometry, ac impedance, and dc conductivity. The doped analogues preserved the orthorhombic symmetry of the parent, LSCTA−. The observed dilatometric results were correlated with the particle size. Ac impedance studies revealed their semi-conducting behaviour in air. Furthermore, the doped compositions showed higher conductivity values in reducing atmosphere. Compared to bare pre reduced LSCTA− having conductivity of 38 S cm−1, the pre reduced 5% Ni doped LSCTA− (LSCTN5) and 5% Fe doped LSCTA− (LSCTF5) showed conductivity values of 47 S cm−1 and 66 S cm−1 at 880 °C, respectively. B-site doping could affect the electrical and catalytic properties of LSCTA− materials making them viable alternatives for fuel cell applications.

KW - B-site doping

KW - Dc conductivity

KW - Anode material

KW - Fuel cell

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M3 - Article

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 1

ER -

Synthesis and characterization of B-site doped La0.20Sr0.25Ca0.45TiO3 as SOFC anode materials

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Keywords

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Energy Materials Discovery: Energy Materials Discovery Characterisation and Application

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Synthesis and characterization of B-site doped La_0.20Sr_0.25Ca_0.45TiO₃ as SOFC anode materials