X-ray photoelectron (XPS) and Diffuse Reflectance Infra Fourier Transformation (DRIFT) study of Ba{sub 0.5}Sr{sub 0.5}Co{sub x}Fe{sub 1-x}O{sub 3-{delta}} (BSCF: x=0-0.8) ceramics

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.06.016· OSTI ID:21580214

Jung, Jae-Il ^[1]; Edwards, Doreen D ^[1]

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1. Kazuo Inamori School of Engineering, Alfred University, Alfred, NY 14802 (United States)

The X-ray photoelectron spectra (XPS) of sintered BSCF ceramics (Ba{sub 0.5}Sr{sub 0.5}Co{sub x}Fe{sub 1-x}O{sub 3-{delta}},0{<=}x{<=}0.8) were measured at room temperature (RT). Peak areas of Fe{sub 2p1}, Fe{sub 2p3}, Fe{sub 3p} and Co{sub 3p} increased systematically with increasing cobalt concentration, while their binding energies (BEs) remained the same (723.3, 710.0, 55.0 and 60.9 eV, respectively). However, the BEs of lattice oxygen in O{sub 1s} (528.1 eV) and Ba{sub 4d} for the BaO bond (87.9V and 90.2 eV) increased with increasing cobalt concentration. The shoulder peak of Ba{sub 3d}/Co{sub 2p} increased from 778.0 to 778.7 eV, which implies that this peak can be attributed to another Ba XPS peak (described as Ba{sub 2nd} in this study) due to the overlapping area between barium cations and oxygen anions. The overall peak areas of Ba{sub 4d} increased up to x=0.4, and then decreased, which coincides with the behavior of the Diffuse Reflectance Infrared Fourier Transform (DRIFT) bands representing adsorbed CO{sub 3}{sup 2-} ({nu}CO{sub 3}{sup 2-}) and structurally bonded CO{sub 3}{sup 2-} ({nu}{sub 2}, {nu}{sub 3}) (800-1200 and 862/1433 cm{sup -1}, respectively). - Graphical abstract: The bonding of CO{sub 3}{sup 2-} to the surface of BSCF perovskite and the bonding state between cations vs. oxygen have been suggested. Highlights: > XPS and DRIFT were measured on BSCF (BSCF: x=0-0.8) samples. > The identity of Ba{sub 3d}/Co{sub 2p} XPS shoulder peak at {approx}778.0 was suggested. > The bonding behavior of CO{sub 3}{sup 2-} to the BSCF prevoskite structure was studied substantially.

• OSTI ID: 21580214
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 8 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BARIUM COMPOUNDS
BARIUM OXIDES
BINDING ENERGY
BONDING
BOUND STATE
CARBON COMPOUNDS
CARBONATES
CATIONS
CERAMICS
CHALCOGENIDES
CHARGED PARTICLES
COBALT
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
FABRICATION
FOURIER TRANSFORMATION
INTEGRAL TRANSFORMATIONS
IONIZING RADIATIONS
IONS
IRON COMPOUNDS
IRON OXIDES
JOINING
METALS
MINERALS
NONMETALS
OXIDE MINERALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PEAKS
PEROVSKITE
PEROVSKITES
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SPECTROSCOPY
STRONTIUM
TRANSFORMATIONS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X RADIATION
X-RAY PHOTOELECTRON SPECTROSCOPY