Synthesis of iron sulfide films through solid–gas reaction of iron with diethyl disulfide

Abstract

2015): Synthesis of iron sulfide films through solid-gas reaction of iron with diethyl disulfide, Journal of Sulfur Chemistry, Iron sulfide films were synthesized by the solid-gas reaction of diethyl disulfide on iron foils in the temperature range of 658-768 K using a microbalance, where the film growth kinetics followed Deal-Grove behavior. Analysis of the films by X-ray photoelectron and Raman spectroscopies as well as X-ray diffraction and scanning electron microscopy analysis revealed the formation of combined FeS/FeS 2 (troilite/pyrite) films with a sheet-like morphology at low temperatures and only FeS (troilite) films with granular morphology at higher temperatures.

Reactive Molecular Dynamics Simulations of Thermal Film Growth from Di-tert-butyl Disulfide on an Fe(100) surface

“…This is likely near the maximum coverage that can be achieved within the nanosecond-scale duration of a reactive MD simulation. Unfortunately, the results cannot be compared directly to experimental observations of Fe–S film growth over minutes of reaction time. ,,, However, the simulations complement experimental approaches since the simulations enable direct observation of individual species involved in reactions with surfaces and their behavior under various conditions, providing information about the initial stages of film formation that is not currently accessible by the use of even highly resolving surface analytical methods.…”

“…Iron sulfide films are used in a variety of applications including solar energy, water treatment, corrosion, and tribology. 1 In the field of tribology, sulfur-containing molecules are additives in lubricant formulations, where they react, typically with steel, during operation to form protective films. 2 However, the mechanisms by which these important films form are poorly understood because they arise within a sliding contact that cannot be directly probed experimentally.…”

“…Iron sulfide films are used in a variety of applications including solar energy, water treatment, corrosion, and tribology . In the field of tribology, sulfur-containing molecules are additives in lubricant formulations, where they react, typically with steel, during operation to form protective films .…”

“…This approach was implemented in experiments with only sulfide molecules (i.e., no oil) on iron foils in vacuum or ultrahigh vacuum where film growth rates were obtained using a microbalance, and the composition of the film was characterized using various techniques. Such studies explored the reaction rates and film compositions of dimethyl disulfide, , carbon disulfide, and diethyl disulfide , on iron. These studies showed that the reaction rate varied with temperature and pressure, and analyses suggested that the trends could be explained by a two-stage film formation process where the reaction initially slows due to the formation of a saturated sulfur layer but then resumes at higher temperatures as sulfur diffuses into the substrate.…”

Shear-driven reactions of organosulfur compounds on ferrous surfaces: A molecular dynamics study

“…Iron sulfide films are known to protect surfaces from friction and wear in lubricated mechanical systems [68,69,70]. The initiation of these reactions is the reaction between sulfur (S) in additives and surface iron (Fe).…”