Table 1 Characteristics of the new phase FeSnano formed and stabilized at pH < 4.5
From: A highly reactive precursor in the iron sulfide system
Parameter | Characteristics | Technique |
|---|---|---|
Size, nm | 2 | TEM |
d-spacings, Å | 12.1, 9.3, 7.6 | XRD, TEM |
S–S species | Monosulfides (62%), polysulfides (17%), disulfides (14%) | XPS, Raman |
Fe–S species | FeII–S (~60%) and FeIII–S (~40%) | XPS |
FeII and FeIII | XANES | |
Interatomic distances, Å | First shell FeII–S: 2.23, 4 S atoms | EXAFS |
Second shell FeII–Fe: 4.10, minimum 2 Fe atoms |
