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Title: XPS study of surface state of novel perovskite system Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-δ} as cathode for solid oxide fuel cells

Abstract

In the present attempt,novel perovskite oxide Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3–δ} (DSCF) as cathode material has been synthesized by an Ethylene glycol-citrate combined sol-gel combustion route. Orthorhombic symmetry structure is confirmed by X-ray diffraction (XRD) and data is well fitted using Rietveld refinement by Full-Prof software suite. Chemical natureof surface of DSCF has been analyzed by using X-ray photoelectron spectroscopy (XPS). XPS result shows that Dy ions are in +3 oxidation state and Sr in +2 states. However Co2p and Fe2p spectra indicates partial change in oxidation state from Co3+/Fe3+ to Co4+/Fe4+. These attribute to develop active sites on the surface for oxygen ions. O1s XPS spectra shows two oxygen peaks relatedto lattice oxygen in perovskite and absorbed oxygen in oxygen vacancy are detected. O1s spectra demonstrate the existence of adsorbed oxygen species on the surface of DSCF oxide which is quite beneficial for intermediate temperature of Solid Oxide Fuel Cell.

Authors:
; ;  [1];  [2]
  1. Depatment of Physics, Rashtrasant Tukadoji Maharaj Nagpur University Campus, Nagpur-440033 (India)
  2. UGC-DAE Consortium for scientific Research, University Campus, Khandwa Road, Indore-452001, Madhya Pradesh,India (India)
Publication Date:
OSTI Identifier:
22591257
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1728; Journal Issue: 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATHODES; CITRATES; COBALT COMPOUNDS; COMBUSTION; DYSPROSIUM COMPOUNDS; DYSPROSIUM IONS; ELECTRON SPECTRA; FERRATES; GLYCOLS; ORTHORHOMBIC LATTICES; OXYGEN IONS; PEROVSKITE; SOL-GEL PROCESS; SOLID OXIDE FUEL CELLS; STRONTIUM COMPOUNDS; SURFACES; VACANCIES; VALENCE; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Kautkar, Pranay R., Acharya, Smita A., E-mail: saha275@yahoo.com, Tumram, Priya V., and Deshpande, U. P. XPS study of surface state of novel perovskite system Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-δ} as cathode for solid oxide fuel cells. United States: N. p., 2016. Web. doi:10.1063/1.4946119.
Kautkar, Pranay R., Acharya, Smita A., E-mail: saha275@yahoo.com, Tumram, Priya V., & Deshpande, U. P. XPS study of surface state of novel perovskite system Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-δ} as cathode for solid oxide fuel cells. United States. doi:10.1063/1.4946119.
Kautkar, Pranay R., Acharya, Smita A., E-mail: saha275@yahoo.com, Tumram, Priya V., and Deshpande, U. P. Fri . "XPS study of surface state of novel perovskite system Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-δ} as cathode for solid oxide fuel cells". United States. doi:10.1063/1.4946119.
@article{osti_22591257,
title = {XPS study of surface state of novel perovskite system Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-δ} as cathode for solid oxide fuel cells},
author = {Kautkar, Pranay R. and Acharya, Smita A., E-mail: saha275@yahoo.com and Tumram, Priya V. and Deshpande, U. P.},
abstractNote = {In the present attempt,novel perovskite oxide Dy{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3–δ} (DSCF) as cathode material has been synthesized by an Ethylene glycol-citrate combined sol-gel combustion route. Orthorhombic symmetry structure is confirmed by X-ray diffraction (XRD) and data is well fitted using Rietveld refinement by Full-Prof software suite. Chemical natureof surface of DSCF has been analyzed by using X-ray photoelectron spectroscopy (XPS). XPS result shows that Dy ions are in +3 oxidation state and Sr in +2 states. However Co2p and Fe2p spectra indicates partial change in oxidation state from Co3+/Fe3+ to Co4+/Fe4+. These attribute to develop active sites on the surface for oxygen ions. O1s XPS spectra shows two oxygen peaks relatedto lattice oxygen in perovskite and absorbed oxygen in oxygen vacancy are detected. O1s spectra demonstrate the existence of adsorbed oxygen species on the surface of DSCF oxide which is quite beneficial for intermediate temperature of Solid Oxide Fuel Cell.},
doi = {10.1063/1.4946119},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1728,
place = {United States},
year = {Fri May 06 00:00:00 EDT 2016},
month = {Fri May 06 00:00:00 EDT 2016}
}