XPS study of Fe(II)Fe(III) (oxy)hydroxycarbonate green rust compounds

Abstract

O(1s) spectra. The deprotonation of the hydroxyl groups compensated for the presence of excess positive charge that resulted from the oxidation of Fe(II) in the GR structure. In addition, the fully ferric GR(CO 3 2− ) * at x = 1 was coated on a sand substrate and the quality of the GR coating was investigated by XPS imaging.

Thiocyanate Anchors for Salt-like Iron(II) Complexes on Au(111): Promises and Caveats

“…S17B, see Supporting Information). The peak positions are consistent with the values reported in the literature for BF − 4 [64], and the measured F:B atomic ratio close to the theoretical ratio of 4:1 further corroborates the co-adsorption of this anion with the iron complex. However, the measured amounts of both fluorine and boron are significantly smaller than expected and come to only about 50 % of the stoichiometric value.…”

“…However, comparison of the intensity of the peak at 533.2 eV, which is assigned to the ether group in the molecule [70,71], with the iron signal yields a ratio close to the expected value of 3:1. The energy of 531.7 eV of the second peak is in the range for the OH − species [64]. Since there is a deficiency in the amount of BF − 4 , as mentioned above, our interpretation is that the tetrafluoroborate anion has been partially replaced by hydroxide ions.…”

Kinetic study of cis-dichloroethylene (cis-DCE) and vinyl chloride (VC) dechlorination using green rusts formed under varying conditions

“…Raw spectra were smoothed and then fitted using a Shirley base-line and a GaussianeLorentzian peak shape. Both Fe 2p 3/2 and O 1s spectra from high resolution scans were decomposed into Fe(II)-O and Fe(III)-O components, using binding energies and FWHM (full width at half maximum) values reported in the literature (Gupta and Sen, 1974;Grosvenor et al, 2004;Mullet et al, 2008aMullet et al, , 2008b.…”

Experimental study of dissolution rates of actinolite in CaCl2–HCl–H2O up to 400°C

“…The O(1s) peak for the reacted actinolite is located at around 531.6 eV, and is broadened from 531 to 529 eV. The lowering of the binding energy peak of O(1s) (OH is around 531 eV) is attributable to OH in the hydrated actinolite (see Mullet et al, 2007). This hydrated surface of actinolite is probably composed of Si-O-Si bonds and hydroxyl (Si-OH and metal-OH bonds), or hydroxides.…”

“…Comparing the spectra before and after reaction, this shift in binding energy for Fe(2p3/2) is primarily attributed to the decrease in the amount of Fe 2+ , and the increase in Fe 3+ , at the surface (see Mclntyre and Zetaruk, 1977;Harvey and Linton, 1981;Mills and Sullivan, 1983;Mullet et al, 2007).…”