Iron-nickel superstructure in metal particles of Alfianello meteorite

Scorzelli, R. B.; Azevedo, I. Souza; Ortalli, I.; Pedrazzi, Giuseppe; Bonazzi, A.

doi:10.1007/bf02074321

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The broad six-line component in the Mössbauer spectra (Table , Figure S2B, Supporting Information) was well fitted with two sextets with a close to zero isomer shift and different B hf . The sextetSx1 has a higher magnetic field and narrower lines, which can be assigned to the (Ni, Fe) alloy with a body-centered cubic cell [α-(Ni, Fe) alloy] . The sextet Sx2, with a lower field and wider lines than Sx1, can be attributed to the (Ni, Fe) alloy with a face-centered cubic cell [γ-(Ni, Fe) alloy] .…”

Section: Resultsmentioning

confidence: 99%

“…The sextetSx1 has a higher magnetic field and narrower lines, which can be assigned to the (Ni, Fe) alloy with a bodycentered cubic cell [α-(Ni, Fe) alloy]. 58 The sextet Sx2, with a lower field and wider lines than Sx1, can be attributed to the (Ni, Fe) alloy with a face-centered cubic cell [γ-(Ni, Fe) alloy]. 59 This assumption is in agreement with the XRD data (Table 5).…”

Section: ■ Introductionmentioning

confidence: 99%

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Nickel-Decorated Mesoporous Iron–Cerium Mixed Oxides: Microstructure and Catalytic Activity in Methanol Decomposition

Tsoncheva

Rosmini

Mihaylov

et al. 2021

ACS Appl. Mater. Interfaces

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Nickel-decorated mesoporous cerium−iron oxide composites were synthesized by a combination of incipient wetness impregnation and templateassisted hydrothermal techniques. The effects of the Fe/Ce ratio and the calcination temperature of cerium−iron oxides on the phase composition, texture, structure, and redox properties of the composites were studied by a combination of N 2 physisorption, XRD, high-resolution transmission electron microscopy, SEM, Mossbauer, Raman, XPS, ultraviolet−visible and FTIR spectroscopies, H 2temperature-programmed reduction, and total oxidation of ethyl acetate as a catalytic test. The combined physicochemical characterization and in situ FTIR investigation of methanol decomposition was used for a proper understanding of the microstructure of the Ni/FeCe oxide composites and the mechanism of the reaction occurring on them. The complex role of the FeCe support in the stabilization of highly dispersed Ni particles, the generation of surface intermediates, and the impact of the support phase transformation under the reaction medium are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Nickel-Decorated Mesoporous Iron–Cerium Mixed Oxides: Microstructure and Catalytic Activity in Methanol Decomposition

Tsoncheva

Rosmini

Mihaylov

et al. 2021

ACS Appl. Mater. Interfaces

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show abstract

“…The spectra of the reduced samples represent superimposition of two sextets (Sx1 and Sx2) and one singlet (Sn) with isomer shift about 0 mm/ s. The Sx1 has a higher magnetic field and narrower lines and can be assumed as (Ni, Fe)-alloy with a body centered cubic cell of kamacite (α-(Ni, Fe) alloy, bcc) [25]. The Sx2 with a lower magnetic field and wider lines can be attributed to (Ni, Fe) alloy with a face centered cubic cell of highly distorted taenite (γ-(Ni, Fe)-alloy, fcc).…”

Section: Phase Composition Textural and Morphological Characterizationmentioning

confidence: 99%