Abstract
The phase equilibria of the Ag–Ga–S–AgBr system in the part GaS–Ga2S5–AgBr–Ag2S below 600 K were investigated by the modified electromotive force (EMF) method using the Ag+ catalysts as small nucleation centers of equilibrium phases. Division of the GaS–Ga2S5–AgBr–Ag2S was carried out with the participation of the following compounds Ag2S, GaS, Ga2S3, AgBr, Ag9GaS6, AgGaS2, Ag3SBr, Ag3Ga2S4Br, and Ag27Ga2S12Br9. Reactions were performed by applying electrochemical cells (ECs) with the structure: (−) IE | NE | SSE | R{Ag+} | PE | IE (+), where IE is the inert electrode (graphite powder), NE is the negative electrode (silver powder), SSE is the solid-state electrolyte (glassy Ag3GeS3Br), PE is the positive electrode, R{Ag+} is the region of Ag+ diffusion into PE. The measured EMF and temperature values of ECs were used to determine the standard thermodynamic functions of the compounds Ag3Ga2S4Br and Ag27Ga2S12Br.
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Acknowledgements
The present work was financed partially by the grant of the Ministry of Education and Science of Ukraine No 0123U101857 “Physico-chemistry of functional nanomaterials for electrochemical systems”, international projects: #HX-010123 from “Materials Phases Data System, Viznau, Switzerland” and the Simons Foundation (Award Number: 1037973). This work was partly funded by the K.H. Renlund Foundation under the project “Innovative e-waste recycling processes for greener and more efficient recoveries of critical metals and energy” at Åbo Akademi University.
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Moroz, M. et al. (2024). Phase Equilibria and Thermodynamic Properties of Selected Compounds in the Ag–Ga–S–AgBr System for Modern Application in Energy Conversion Devices. In: Iloeje, C., et al. Energy Technology 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50244-6_23
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