Plasma catalytic oxidation of toluene over double perovskite-type oxide via packed-bed DBD

The aim of this work is to study the perovskite-type oxide Ca2BWO6 materials, where B = Cr, La and Sm, obtained by the sol�gel citrate-combustion method. The nature of the B-site cations influences the structure and properties of these compound. The synthesis progress was evaluated using X-ray diffraction and the structure of the samples was characterized by the Fourier transform infrared spectroscopy. In our case, the tolerance factor decrease with increasing of the ionic radius B leads to the structural distortion different from the cubic one. The magnetic properties were evaluated by a SQUID magnetometer and they are discussed in relationship with their compositions. From experimental data, it was noticed that all compound are ferromagnetic.

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Study of the reactivity of Double-perovskite type oxide La1−xMxNiO4 (M = Ca or Sr) for chemical looping hydrogen production

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2017.11.132 ◽

2018 ◽

Vol 43 (3) ◽

pp. 1406-1414 ◽

Cited By ~ 12

Author(s):

Vítor R.M. Melo ◽

Rodolfo L.B.A. Medeiros ◽

Renata M. Braga ◽

Heloísa P. Macedo ◽

Juan A.C. Ruiz ◽

...

Keyword(s):

Hydrogen Production ◽

Double Perovskite ◽

Chemical Looping ◽

Perovskite Type Oxide ◽

Perovskite Type

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Anisotropy of Piezoelectricity near Morphotropic Phase Boundary in Perovskite-Type Oxide Ferroelectrics

Ferroelectrics ◽

10.1080/00150190211309 ◽

2002 ◽

Vol 266 (1) ◽

pp. 393-407

Author(s):

Makoto Iwata ◽

Hiroshi Orihara ◽

Yoshihiro Ishibashi

Keyword(s):

Phase Boundary ◽

Morphotropic Phase Boundary ◽

Perovskite Type Oxide ◽

Perovskite Type

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First-principles Studies of Phase Stability and the Neutral Atomic Vacancies in LiNbO3, NaNbO3 and KNbO3

MRS Proceedings ◽

10.1557/proc-0902-t10-46 ◽

2005 ◽

Vol 902 ◽

Cited By ~ 2

Author(s):

Akio Shigemi ◽

Takahiro Wada

Keyword(s):

Enthalpy Of Formation ◽

Density Functional ◽

Formation Energy ◽

Type Structure ◽

Enthalpies Of Formation ◽

Functional Formalism ◽

Reducing Atmosphere ◽

Perovskite Type Oxide ◽

Formation Energies ◽

Perovskite Type

AbstractWe overall evaluated the enthalpies of formation and the formation energies of neutral vacancies in ANbO3 (A = Li, Na, K) using a plane-wave pseudopotential method within a density functional formalism. The LiNbO3 phase with the LiNbO3-type structure was confirmed to have lower enthalpy of formation than that with perovskite- or ilmenite-type structure. The NaNbO3 (R3c) and KNbO3 (Bmm2 and R3m) phases with the lowest symmetry were found to have the lowest enthalpy of formation. The formation energy of a A vacancy was found to be the lowest under an oxidizing atmosphere and that of an O vacancy was found to be the lowest under a reducing atmosphere. The formation energy of a Nb vacancy was the highest under both oxygen-rich and -poor conditions. These results are in agreement with the empirical rule that B site defects in perovskite-type oxide do not exist.

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