Mackinawite formation from elemental iron and sulfur

Sulfur-assisted corrosion is a process known to material scientists for many decades now. Though the corrosion of iron in the presence of sulfur has been studied extensively, it has never been used to intentionally synthesize mackinawite. In contrast to the conventional preparation of mackinawite by...

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Veröffentlicht in:RSC advances Jg. 11; H. 51; S. 32464 - 32475
Hauptverfasser: Bolney, Robert, Grosch, Mario, Winkler, Mario, van Slageren, Joris, Weigand, Wolfgang, Robl, Christian
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England Royal Society of Chemistry 01.10.2021
The Royal Society of Chemistry
Schlagworte:
Chemistry
Corrosion
Iron
Sulfur
ISSN:2046-2069, 2046-2069
Online-Zugang:Volltext
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Zusammenfassung:Sulfur-assisted corrosion is a process known to material scientists for many decades now. Though the corrosion of iron in the presence of sulfur has been studied extensively, it has never been used to intentionally synthesize mackinawite. In contrast to the conventional preparation of mackinawite by precipitation, the synthesis from the elements can be carried out without additional ions. This makes it possible to investigate the influence of any dissolved salts on the mackinawite formation and its properties. We found that the addition of NaCl significantly accelerates the reaction and furthermore influences the Fe 2+ ion content of the formed mackinawite itself. This finding leads us to propose a novel model of charged layers which can be used to explain some of the inconsistencies found in the literature regarding the structure and particle characteristics of nano-mackinawite. Nanoparticulate mackinawite was synthesized from elemental iron and sulfur in a convenient and reliable reaction. The structure and composition of the products were characterized and a new model describing the particle characteristics is established.
Bibliographie:10.1039/d1ra03705f
Electronic supplementary information (ESI) available: Video footage of the reaction between sulfur grains and an iron plate. See DOI
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Equal contribution from the authors.
ISSN:2046-2069
2046-2069
DOI:10.1039/d1ra03705f