XAFS analysis has been carried out for the reduction process of the impregnated precursor to prepare the FeNi alloy catalyst. The FeNi catalyst is normally prepared by the impregnation method. Both of Ni(NO3)2･6H2O and Fe(NO3)3･9H2O was dissolved in water, and the SiO2 powder was suspended into the solution. The

Dec 1, 1990 · X-ray Absorption Fine Structure (XAFS) measurements have been carried out for Fe-Ni alloys which undergo fee → bcc martensitic transformation. From EXAFS analysis, the local structural change occurs at a higher temperature than M s and the bcc structure is locally more stable around Fe atom than around Ni atom.

Feb 18, 2021 · In this study, a series of techniques, including X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), and XAFS spectroscopy, were applied to Fe, Ni, and Ge in the iron meteorite NWA 859 to understand its crystallographic, chemical, and textural properties.

Aug 15, 2024 · The XAFS analysis clearly displayed the coordination structure and interactions of the FeNi dual atoms. The DFT calculations show that P-O bonds have great influence on the electronic structure of the FeNi dual atoms.

Apr 23, 2008 · We report $\text{Ni}\text{ }K$-edge fluorescence x-ray absorption fine structure spectra (XAFS) for ${\text{Fe}}_{0.75}{\text{Ni}}_{0.05}{\text{S}}_{0.20}$ and ${\text{Fe}}_{0.75}{\text{Ni}}_{0.05}{\text{Si}}_{0.20}$ ternary alloys from room …

Apr 1, 2020 · Herein we present a novel strategy to synthesize a bifunctional electrocatalyst composed of FeNi alloy nanoparticles embedded in N-doped CNTs-tangled porous carbon fiber (FeNi/N-CPCF) via electrospinning and subsequent annealing treatment.

Dec 14, 2020 · Our study reveals that the partial oxidation of the FeNi 2 S 4 surface, as well as the synergy of the Fe and Ni ions, are important in the catalytic activity of the material for the effective hydrogenation of CO 2 to formate.

Dec 2, 2020 · We investigated the magnetism of body-centered cubic (bcc) FeNi alloys (Fe 92 Ni 08, Fe 87 Ni 13, and Fe 84 Ni 16) as a function of pressure at room temperature through the bcc to hexagonal closed packed (hcp) phase transition.

To study the structure of Fe-Ni-S and Fe-Ni-Si melts at high temperature, we have developed a setup, for collecting the high-temperature fluorescence XAFS spectra in a 90° geometry, and present the Ni K-edge XAFS spectra of Fe-Ni-S/Si melts in this paper.

Feb 5, 2020 · We investigated the magnetism of body centered cubic (bcc) FeNi alloys (Fe92Ni08, Fe87Ni13, and Fe84Ni16) as a function of pressure at room temperature through the bcc to hexagonal closed packed (hcp) phase transition.