Spectre documentation Thermo Fisher scientific

Samples of the iron oxides Fe0.94O, Fe3O4, Fe2O3, and Fe2SiO4 were prepared by high temperature equilibration in controlled gas atmospheres. The samples were fractured in vacuum and high resolution XPS spectra of the fractured surfaces were measured. The peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the Fe 3p XPS spectra of the standard samples of 2FeO-SiO2 and Fe2O3, respectively. Using these parameters, the Fe 3p peaks of Fe3O4 and Fe1-yO are analysed. The results indicate that high resolution XPS techniques can be used to determine the Fe2+/Fe3+ ratios in metal oxides. The technique has the potential for application to other transition metal oxide systems.

Samples of the iron oxides Fe0.94O, Fe3O4, Fe2O3, and Fe2SiO4 were prepared by high temperature equilibration in controlled gas atmospheres. The samples were fractured in vacuum and high resolution XPS spectra of the fractured surfaces were measured. The peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the Fe 3p XPS spectra of the standard samples of 2FeO-SiO2 and Fe2O3, respectively. Using these parameters, the Fe 3p peaks of Fe3O4 and Fe1-yO are analysed. The results indicate that high resolution XPS techniques can be used to determine the Fe2+/Fe3+ ratios in metal oxides. The technique has the potential for application to other transition metal oxide systems.

Samples of the iron oxides Fe0.94O, Fe3O4, Fe2O3, and Fe2SiO4 were prepared by high temperature equilibration in controlled gas atmospheres. The samples were fractured in vacuum and high resolution XPS spectra of the fractured surfaces were measured. The peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the Fe 3p XPS spectra of the standard samples of 2FeO-SiO2 and Fe2O3, respectively. Using these parameters, the Fe 3p peaks of Fe3O4 and Fe1-yO are analysed. The results indicate that high resolution XPS techniques can be used to determine the Fe2+/Fe3+ ratios in metal oxides. The technique has the potential for application to other transition metal oxide systems.

This paper presents a report on the XPS coherent binding energy BE.data basis for iron and sulfur reference compounds that are representative of oxidation products formed onto the pyrite reactive surface. This work is unique for various reasons: no recent published after 1980. BE data basis with similar normalization method has been found in the literature; the coupling of data collected from Fe and S photoelectron peaks and from charge transfer satellites of Fe allows for the simultaneous determination of the oxidation state and chemical environment; the depth heterogeneities of samples can be taken into account by comparing the data obtained with Fe2p and Fe3p peaks, whose associated BEs are widely divergent. In the second part of the paper, the data in BEs obtained from reference compounds have been exploited to show the surface species of an oxidized pyrite in a HCOy3 medium (10-2 M)

This paper presents a report on the XPS coherent binding energy BE.data basis for iron and sulfur reference compounds that are representative of oxidation products formed onto the pyrite reactive surface. This work is unique for various reasons: no recent published after 1980. BE data basis with similar normalization method has been found in the literature; the coupling of data collected from Fe and S photoelectron peaks and from charge transfer satellites of Fe allows for the simultaneous determination of the oxidation state and chemical environment; the depth heterogeneities of samples can be taken into account by comparing the data obtained with Fe2p and Fe3p peaks, whose associated BEs are widely divergent. In the second part of the paper, the data in BEs obtained from reference compounds have been exploited to show the surface species of an oxidized pyrite in a HCOy3 medium (10-2 M)