Effect of Sr substituted La 2−x Sr x NiO 4+δ (x = 0, 0.2, 0.4, 0.6, and 0.8) on oxygen stoichiometry and oxygen transport properties

T. Inprasit; S. Wongkasemjit; S. J. Skinner; M. Burriel; P. Limthongkul

doi:10.1039/c4ra11672k

Effect of Sr substituted La 2−x Sr x NiO 4+δ (x = 0, 0.2, 0.4, 0.6, and 0.8) on oxygen stoichiometry and oxygen transport properties

T. Inprasit, S. Wongkasemjit, S. J. Skinner, M. Burriel, P. Limthongkul

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

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Abstract

© The Royal Society of Chemistry 2015. Stoichiometry and oxygen diffusion properties of La2-xSrxNiO4±δ with x = 0.2, 0.4, 0.6, and 0.8 prepared via a sol-gel method were investigated in this study. Iodometric titration and thermogravimetric analysis were used to determine the oxygen non-stoichiometry. Over the entire compositional range, the samples exhibit oxygen hyperstoichiometry with the minimum value δ = 0.14 at x = 0.4. Mixed effects of reduction of oxygen excess and increasing valence of Ni were found to serve as charge compensation mechanisms; the former dominated at a low level of substitution, x < 0.4, while the latter dominated at higher levels of Sr (0.4 < x < 0.8). The highest oxygen diffusion coefficient was found for the minimum amount of Sr substitution, x = 0.2, continuously decreasing with x until x = 0.6. An unusual increase in D∗ was observed when the Sr content increased up to x = 0.8.

Original language	English (US)
Pages (from-to)	2486-2492
Number of pages	7
Journal	RSC Adv.
Volume	5
Issue number	4
DOIs	https://doi.org/10.1039/c4ra11672k
State	Published - 2015
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was partially funded by the postgraduate education and research programs in Petroleum and Petrochemical Technology (PPT Consortium), Rachadapisake Sompote fund, Chulalongkorn University, the Development and Promotion of Science and Technology, Thailand project (DPST), National Metal and Materials Technology Center (MTEC), Thailand (P-0030259), a Marie Curie Intra European Fellowship within the seventh European Community Framework Programme (PIEFGA- 2009-252711) and from King Abdullah University of Science & Technology, Saudi Arabia (for M. B). The authors would like to thank Dr Sumittra Charojrochkul from MTEC, Thailand for useful discussion, and staff at the Department of Materials, Imperial College London for their support for the work performed at the Imperial College, London.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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title = "Effect of Sr substituted La 2−x Sr x NiO 4+δ (x = 0, 0.2, 0.4, 0.6, and 0.8) on oxygen stoichiometry and oxygen transport properties",

abstract = "{\textcopyright} The Royal Society of Chemistry 2015. Stoichiometry and oxygen diffusion properties of La2-xSrxNiO4±δ with x = 0.2, 0.4, 0.6, and 0.8 prepared via a sol-gel method were investigated in this study. Iodometric titration and thermogravimetric analysis were used to determine the oxygen non-stoichiometry. Over the entire compositional range, the samples exhibit oxygen hyperstoichiometry with the minimum value δ = 0.14 at x = 0.4. Mixed effects of reduction of oxygen excess and increasing valence of Ni were found to serve as charge compensation mechanisms; the former dominated at a low level of substitution, x < 0.4, while the latter dominated at higher levels of Sr (0.4 < x < 0.8). The highest oxygen diffusion coefficient was found for the minimum amount of Sr substitution, x = 0.2, continuously decreasing with x until x = 0.6. An unusual increase in D∗ was observed when the Sr content increased up to x = 0.8.",

author = "T. Inprasit and S. Wongkasemjit and Skinner, {S. J.} and M. Burriel and P. Limthongkul",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was partially funded by the postgraduate education and research programs in Petroleum and Petrochemical Technology (PPT Consortium), Rachadapisake Sompote fund, Chulalongkorn University, the Development and Promotion of Science and Technology, Thailand project (DPST), National Metal and Materials Technology Center (MTEC), Thailand (P-0030259), a Marie Curie Intra European Fellowship within the seventh European Community Framework Programme (PIEFGA- 2009-252711) and from King Abdullah University of Science & Technology, Saudi Arabia (for M. B). The authors would like to thank Dr Sumittra Charojrochkul from MTEC, Thailand for useful discussion, and staff at the Department of Materials, Imperial College London for their support for the work performed at the Imperial College, London. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2015",

doi = "10.1039/c4ra11672k",

language = "English (US)",

volume = "5",

pages = "2486--2492",

journal = "RSC Adv.",

issn = "2046-2069",

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TY - JOUR

T1 - Effect of Sr substituted La 2−x Sr x NiO 4+δ (x = 0, 0.2, 0.4, 0.6, and 0.8) on oxygen stoichiometry and oxygen transport properties

AU - Inprasit, T.

AU - Wongkasemjit, S.

AU - Skinner, S. J.

AU - Burriel, M.

AU - Limthongkul, P.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was partially funded by the postgraduate education and research programs in Petroleum and Petrochemical Technology (PPT Consortium), Rachadapisake Sompote fund, Chulalongkorn University, the Development and Promotion of Science and Technology, Thailand project (DPST), National Metal and Materials Technology Center (MTEC), Thailand (P-0030259), a Marie Curie Intra European Fellowship within the seventh European Community Framework Programme (PIEFGA- 2009-252711) and from King Abdullah University of Science & Technology, Saudi Arabia (for M. B). The authors would like to thank Dr Sumittra Charojrochkul from MTEC, Thailand for useful discussion, and staff at the Department of Materials, Imperial College London for their support for the work performed at the Imperial College, London. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2015

Y1 - 2015

N2 - © The Royal Society of Chemistry 2015. Stoichiometry and oxygen diffusion properties of La2-xSrxNiO4±δ with x = 0.2, 0.4, 0.6, and 0.8 prepared via a sol-gel method were investigated in this study. Iodometric titration and thermogravimetric analysis were used to determine the oxygen non-stoichiometry. Over the entire compositional range, the samples exhibit oxygen hyperstoichiometry with the minimum value δ = 0.14 at x = 0.4. Mixed effects of reduction of oxygen excess and increasing valence of Ni were found to serve as charge compensation mechanisms; the former dominated at a low level of substitution, x < 0.4, while the latter dominated at higher levels of Sr (0.4 < x < 0.8). The highest oxygen diffusion coefficient was found for the minimum amount of Sr substitution, x = 0.2, continuously decreasing with x until x = 0.6. An unusual increase in D∗ was observed when the Sr content increased up to x = 0.8.

AB - © The Royal Society of Chemistry 2015. Stoichiometry and oxygen diffusion properties of La2-xSrxNiO4±δ with x = 0.2, 0.4, 0.6, and 0.8 prepared via a sol-gel method were investigated in this study. Iodometric titration and thermogravimetric analysis were used to determine the oxygen non-stoichiometry. Over the entire compositional range, the samples exhibit oxygen hyperstoichiometry with the minimum value δ = 0.14 at x = 0.4. Mixed effects of reduction of oxygen excess and increasing valence of Ni were found to serve as charge compensation mechanisms; the former dominated at a low level of substitution, x < 0.4, while the latter dominated at higher levels of Sr (0.4 < x < 0.8). The highest oxygen diffusion coefficient was found for the minimum amount of Sr substitution, x = 0.2, continuously decreasing with x until x = 0.6. An unusual increase in D∗ was observed when the Sr content increased up to x = 0.8.

UR - http://hdl.handle.net/10754/598060

UR - http://xlink.rsc.org/?DOI=C4RA11672K

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U2 - 10.1039/c4ra11672k

DO - 10.1039/c4ra11672k

M3 - Article

SN - 2046-2069

VL - 5

SP - 2486

EP - 2492

JO - RSC Adv.

JF - RSC Adv.

IS - 4

ER -

Effect of Sr substituted La 2−x Sr x NiO 4+δ (x = 0, 0.2, 0.4, 0.6, and 0.8) on oxygen stoichiometry and oxygen transport properties

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