Structural study of LaNixFe1−xO3 prepared from precursor salts

Bontempi, Elza; Garzella, C.; Valetti, S.; Depero, Laura E.

doi:10.1016/s0955-2219(03)00026-8

Cited by 37 publications

(15 citation statements)

References 21 publications

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“…They show bands at 405 cm )1 (very strong), 450 cm )1 (weak), 485 cm )1 (medium), 590 cm )1 (medium), 675 cm )1 (very weak), 705 cm )1 (strong), and 815 cm )1 (very weak). The spectra obtained are similar to those corresponding to rhombohedral LaFeO 3 [19], rhombohedral LaCoO 3 [13] and rhombohedral LaNiO 3 [23]. Also, Popa et al [24] obtained very similar spectra for these three perovskite phases.…”

Section: Laser Raman Spectroscopy (Lrs)supporting

confidence: 72%

Effect of the calcium on the textural, structural and catalytic properties of La1–x Ca x Co1–y Fe y O3 perovskites

et al. 2007

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perovskites, the calcium substitution modifies the crystalline structure toward a pseudocubic one and produces an electronic unbalance, compensated by the formation of oxygen vacancies and Fe 4+ ions. It also increases slightly the ethanol conversion in total combustion, compensating the detriment of catalytic activity caused by the iron substitution and it increases notably the selectivity to total oxidation.

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Section: Laser Raman Spectroscopy (Lrs)supporting

confidence: 72%

Effect of the calcium on the textural, structural and catalytic properties of La1–x Ca x Co1–y Fe y O3 perovskites

et al. 2007

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“…However, Raman scattering carried out on these samples predicts that short-range symmetry (order) is not same [39]. Hence, the present brief investigation shows that the established crystal structure (orthorhombic structure) for PrFe 1Àx Ni x O 3 (in thin film form and as well in bulk form) and other similar systems (for example LaFe 1Àx Ni x O 3 ) is not correct.…”

Section: Phase Transitions 175mentioning

confidence: 60%

Symmetry breaking in Ni-doped PrFeO₃ thin films established by Raman study

2011

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Structural and Raman study of PrFe 1Àx Ni x O 3 (0 x 0.5) thin films deposited on LaAlO 3 substrate by Pulse laser deposition is presented. Structural analysis by X-ray diffraction shows that these films are highly epitaxial grown along the c-axis with (0 0 l) orientation and have an orthorhombic structure with space group Pbnm throughout the doping range. From Raman spectrum, a new peak starts developing at around 574 cm À1 in this system with Ni doping. However, after x ¼ 0.3 Ni concentration, there is a decline in intensity of this observed peak and for x ! 0.3, it (this mode) becomes hard to resolve with other observed modes. The generation of this new peak (574 cm À1 ) in the other similar system (LaFe 1Àx Ni x O 3 ) with Ni doping is also observed. This study is a direct indication of a structural phase transition (SPT) or symmetry breaking in the present and related systems. The established orthorhombic structure for the present and related system is doubtful.

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“…It can be seen that unsubstituted LaFeO 3 corresponds to an orthorhombic (JC-PDF 371 493) and LaNiO 3 to a rhombohedral (JC-PDF, 330 711) structure, respectively. 11,12 For the pure LaFeO 3 perovskite, an orthorhombic structure is obtained, with no evidence of extra phases; however, for the pure LaNiO 3 counterpart, the peak at 2θ = 43.3…”

Section: Resultsmentioning

confidence: 99%

Effect of B‐site cation on the catalytic activity of La_1−xCa_xBO₃ (B = Fe, Ni) perovskite‐type oxides for toluene combustion

Pecchi

Jiliberto

Delgado

et al. 2011

J of Chemical Tech & Biotech

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Structural study of LaNixFe1−xO3 prepared from precursor salts

Cited by 37 publications

References 21 publications

Effect of the calcium on the textural, structural and catalytic properties of La1–x Ca x Co1–y Fe y O3 perovskites

Effect of the calcium on the textural, structural and catalytic properties of La1–x Ca x Co1–y Fe y O3 perovskites

Symmetry breaking in Ni-doped PrFeO₃ thin films established by Raman study

Effect of B‐site cation on the catalytic activity of La_1−xCa_xBO₃ (B = Fe, Ni) perovskite‐type oxides for toluene combustion

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Structural study of LaNixFe1−xO3 prepared from precursor salts

Cited by 37 publications

References 21 publications

Effect of the calcium on the textural, structural and catalytic properties of La1–x Ca x Co1–y Fe y O3 perovskites

Effect of the calcium on the textural, structural and catalytic properties of La1–x Ca x Co1–y Fe y O3 perovskites

Symmetry breaking in Ni-doped PrFeO3 thin films established by Raman study

Effect of B‐site cation on the catalytic activity of La1−xCaxBO3 (B = Fe, Ni) perovskite‐type oxides for toluene combustion

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Symmetry breaking in Ni-doped PrFeO₃ thin films established by Raman study

Effect of B‐site cation on the catalytic activity of La_1−xCa_xBO₃ (B = Fe, Ni) perovskite‐type oxides for toluene combustion