TY - GEN
T1 - Thermodynamic Examination of Selected Phases in the Ag–Co–Sn–S System at T < 600 K by the Solid-State EMF Method
AU - Moroz, Mykola
AU - Tesfaye, Fiseha
AU - Demchenko, Pavlo
AU - Prokhorenko, Myroslava
AU - Mysina, Oksana
AU - Soliak, Lyudmyla
AU - Lindberg, Daniel
AU - Reshetnyak, Oleksandr
AU - Hupa, Leena
N1 - Funding Information:
This research was supported by the national projects of the Ministry of Education and Science of Ukraine: “Scientific and experimental basis for the production of composite oxide, chalcogenide materials with extended service life” (No. 0121U109620) and “Synthesis, physicochemical and thermodynamic properties of nano sized and nanostructured materials for electrochemical systems” (No. 0120U102184). This work was partly funded by the Swedish Cultural Foundation in Finland under the project “Innovative ewaste recycling processes for greener and more efficient recoveries of critical metals and energy” at Åbo Akademi University.
Publisher Copyright:
© 2023, The Minerals, Metals & Materials Society.
PY - 2023
Y1 - 2023
N2 - Phase equilibria in the part SnS–SnS2–CoS2–CoS–Ag2CoS2–SnS of the Ag–Co–Sn–S system at T < 600 K were investigated by the modified solid-state electromotive force (EMF) method. The position of established phase regions vs point of Ag was used to express the overall potential-forming reactions. The reactions were performed in the positive electrodes of the electrochemical cells (ECCs). The positive electrodes of ECCs were prepared from carefully mixed non-equilibrium powder mixtures of Ag, Ag2S, CoS2, Co3S4, Co9S8, SnS2, Sn2S3, and SnS. Synthesis of the equilibrium set of phases in the positive electrodes of the ECCs was facilitated by Ag+ ions that shifted from the left electrode and acted as the small nucleation centers of formation of the compounds. Linear dependences of the EMF of the ECCs on temperature were used for calculating standard Gibbs energies, enthalpies, and entropies of formations of the compounds CoS, AgCoS2, Ag2CoS2, Ag2CoSnS4, and Ag2CoSn3S8. The thermodynamic data obtained in the present study were compared and analyzed in detail.
AB - Phase equilibria in the part SnS–SnS2–CoS2–CoS–Ag2CoS2–SnS of the Ag–Co–Sn–S system at T < 600 K were investigated by the modified solid-state electromotive force (EMF) method. The position of established phase regions vs point of Ag was used to express the overall potential-forming reactions. The reactions were performed in the positive electrodes of the electrochemical cells (ECCs). The positive electrodes of ECCs were prepared from carefully mixed non-equilibrium powder mixtures of Ag, Ag2S, CoS2, Co3S4, Co9S8, SnS2, Sn2S3, and SnS. Synthesis of the equilibrium set of phases in the positive electrodes of the ECCs was facilitated by Ag+ ions that shifted from the left electrode and acted as the small nucleation centers of formation of the compounds. Linear dependences of the EMF of the ECCs on temperature were used for calculating standard Gibbs energies, enthalpies, and entropies of formations of the compounds CoS, AgCoS2, Ag2CoS2, Ag2CoSnS4, and Ag2CoSn3S8. The thermodynamic data obtained in the present study were compared and analyzed in detail.
KW - Ag-based compounds
KW - EMF method
KW - Gibbs energy
KW - Phase equilibria
KW - Thermodynamic properties
UR - http://www.scopus.com/inward/record.url?scp=85152365023&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-22638-0_26
DO - 10.1007/978-3-031-22638-0_26
M3 - Conference article in proceedings
AN - SCOPUS:85152365023
SN - 978-3-031-22637-3
SN - 978-3-031-22640-3
T3 - Minerals, Metals and Materials Series
SP - 261
EP - 272
BT - Energy Technology 2023
A2 - Alam, Shafiq
A2 - Post Guillen, Donna
A2 - Tesfaye, Fiseha
A2 - Zhang, Lei
A2 - Hockaday, Susanna A.C.
A2 - Neelameggham, Neale R.
A2 - Peng, Hong
A2 - Haque, Nawshad
A2 - Liu, Yan
PB - Springer
T2 - TMS Annual Meeting and Exhibition
Y2 - 19 March 2023 through 23 March 2023
ER -