Operando exploration of tribochemical decomposition in synthetic FeS2 thin film and mineral iron pyrite

E. Muñoz-Cortés; J. Sánchez-Prieto; B. Zabala; C. Sanchez; E. Flores; A. Flores; E. Roman; J. R. Ares; R. Nevshupa

doi:10.1039/D3MR00027C

Operando exploration of tribochemical decomposition in synthetic FeS₂ thin film and mineral iron pyrite†

E. Muñoz-Cortés,

^a J. Sánchez-Prieto,

‡^b B. Zabala,

^c C. Sanchez,

^ad E. Flores,

^e A. Flores,

^f E. Roman,^g J. R. Ares

^a and R. Nevshupa

*^h

Author affiliations

* Corresponding authors

^a MIRE-group, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid 28049, Spain

^b Centre for Micro Analysis of Materials, Universidad Autónoma de Madrid, C/ Faraday 3, Madrid 28049, Spain

^c Materials and Tribology Unit, Tekniker, C/ I. Goenaga 5, Eibar 20600, Spain

^d Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Francisco Tomás y Valiente 7, Madrid 28049, Spain

^e Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados (CINVESTAV), Merida 97310, Mexico

^f Departamento de Física de Polímeros, Elastómeros y Aplicaciones Energéticas, Instituto de Ciencia y Tecnología de Polímeros (ICTP), CSIC, C/ Juan de la Cierva 3, Madrid 28006, Spain

^g Institute of Materials Science of Madrid (ICMM), CSIC, C/ Sor Juan Inés de la Cruz 3, Madrid 28048, Spain

^h Eduardo Torroja Institute of Construction Sciences (IETCC), CSIC, C/ Serrano Gal-vache 4, Madrid 28033, Spain
E-mail: r.nevshupa@csic.es

Abstract

Tribochemical decomposition of thin-film synthetic iron disulfide and mineral iron pyrite was studied using a combination of operando mass-spectrometry coupled to ultrahigh vacuum tribochemical cell and the gas expansion system. The composition and kinetics of gas emission were analyzed using an original methodology. It was found that carbon-containing gases were dominating. The sulfur-containing gases comprised H₂S, COS and CS₂. The latter two were unexpected. The emission of these gases was traced back to solid-state chemical reactions kinetically controlled by the precursor concentrations and driven through non-thermal mechanisms, which we tentatively assigned to formation of sulfur radicals.

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

DOI: https://doi.org/10.1039/D3MR00027C
Article type: Paper
Submitted: 04 Dec 2023
Accepted: 10 Mar 2024
First published: 11 Mar 2024
This article is Open Access

Download Citation

RSC Mechanochem., 2024,1, 196-210

Permissions

Request permissions

Operando exploration of tribochemical decomposition in synthetic FeS₂ thin film and mineral iron pyrite

E. Muñoz-Cortés, J. Sánchez-Prieto, B. Zabala, C. Sanchez, E. Flores, A. Flores, E. Roman, J. R. Ares and R. Nevshupa, RSC Mechanochem., 2024, 1, 196 DOI: 10.1039/D3MR00027C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

RSC Mechanochemistry