Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System

Mykola Moroz; Fiseha Tesfaye; Pavlo Demchenko; Myroslava Prokhorenko; Bohdan Rudyk; Serhiy  Prokhorenko; Samira  Imamaliyeva; Mahammad  Babanly; Oleksandr Reshetnyak

Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System

Mykola Moroz^*, Fiseha Tesfaye, Pavlo Demchenko, Myroslava Prokhorenko, Bohdan Rudyk, Serhiy Prokhorenko, Samira Imamaliyeva, Mahammad Babanly, Oleksandr Reshetnyak

^*Corresponding author for this work

Laboratory of Molecular Science and Engineering

Research output: Chapter in Book/Conference proceeding › Published conference proceeding › Scientific › peer-review

Abstract

The phase equilibria of the Ag–Pd–Ge–S system in the phase region Ge–GeS2–PdS2–PdS–Ag2PdS2 were established by advanced electromotive force (EMF) method. For the phase space studies and thermodynamic measurements, the following type of electrochemical cells (ECCs) were assembled: (−) С || Ag || SЕ || R(Ag+) || PЕ || С (+), where C is the graphite; Ag is the powdered silver; SE is the purely ionic Ag+ conductor (Ag2GeS3 glass); PE is the positive electrode; R(Ag+) is the diffusion region of the Ag+ ions from SE to PE. The values of the standard thermodynamic functions (Gibb’s energy, enthalpy, and entropy) of the Ag2PdGeS4 compound were established for the first time from the linear temperature dependencies of EMF of the ECCs. The thermodynamic data determined in this work will contribute to a better understanding of the studied chalcogenides and their user limitations.

Original language	English
Title of host publication	Energy Technology 2026
Subtitle of host publication	Carbon Dioxide Management and Other Technologies
Place of Publication	Switzerland
Pages	1-7
Number of pages	7
Volume	1
Edition	1
Publication status	Accepted/In press - 2026
MoE publication type	A4 Article in a conference publication
Event	TMS 2026 Annual Meeting & Exhibition: TMS 2026 - San Diego Convention Center and Hilton San Diego Bayfront, San Diego, United States Duration: 15 Mar 2026 → 19 Mar 2026 Conference number: 155 https://www.tms.org/TMS2026/TMS2026/Default.aspx

Publication series

Name	The Minerals, Metals & Materials Series
Publisher	Springer Cham
Number	1
Volume	1
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	TMS 2026 Annual Meeting & Exhibition
Abbreviated title	TMS 2026
Country/Territory	United States
City	San Diego
Period	15/03/26 → 19/03/26
Internet address	https://www.tms.org/TMS2026/TMS2026/Default.aspx

Keywords

Chalcogenide compounds
Thermodynamic properties
EMF method
Gibbs energy
Phase equilibria

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

GLCE: A step forward on greener and low-carbon extraction and recovery of non-ferrous metals
Tesfaye, F. (Principal Investigator), Vainio, E. (Principal Investigator) & Hupa, L. (Principal Investigator)
01/01/24 → 31/03/26
Project: Foundation

TMS 2026 Annual Meeting & Exhibition
Tesfaye, F. (Organiser), Yucel, O. (Organiser), Alam, S. (Organiser) & Peng, H. (Organiser)
15 Mar 2026 → 19 Mar 2026
Activity: Participating in or organising an event › Organising a conference, symposium or workshop

Cite this

Moroz, M., Tesfaye, F., Demchenko, P., Prokhorenko, M., Rudyk, B., Prokhorenko, S., Imamaliyeva, S., Babanly, M., & Reshetnyak, O. (Accepted/In press). Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System. In Energy Technology 2026 : Carbon Dioxide Management and Other Technologies (1 ed., Vol. 1, pp. 1-7). (The Minerals, Metals & Materials Series; Vol. 1, No. 1)..

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title = "Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System",

abstract = "The phase equilibria of the Ag–Pd–Ge–S system in the phase region Ge–GeS2–PdS2–PdS–Ag2PdS2 were established by advanced electromotive force (EMF) method. For the phase space studies and thermodynamic measurements, the following type of electrochemical cells (ECCs) were assembled: (−) С || Ag || SЕ || R(Ag+) || PЕ || С (+), where C is the graphite; Ag is the powdered silver; SE is the purely ionic Ag+ conductor (Ag2GeS3 glass); PE is the positive electrode; R(Ag+) is the diffusion region of the Ag+ ions from SE to PE. The values of the standard thermodynamic functions (Gibb{\textquoteright}s energy, enthalpy, and entropy) of the Ag2PdGeS4 compound were established for the first time from the linear temperature dependencies of EMF of the ECCs. The thermodynamic data determined in this work will contribute to a better understanding of the studied chalcogenides and their user limitations.",

keywords = "Chalcogenide compounds, Thermodynamic properties, EMF method, Gibbs energy, Phase equilibria",

author = "Mykola Moroz and Fiseha Tesfaye and Pavlo Demchenko and Myroslava Prokhorenko and Bohdan Rudyk and Serhiy Prokhorenko and Samira Imamaliyeva and Mahammad Babanly and Oleksandr Reshetnyak",

year = "2026",

language = "English",

volume = "1",

series = "The Minerals, Metals \& Materials Series",

publisher = "Springer Cham",

number = "1",

pages = "1--7",

booktitle = "Energy Technology 2026",

edition = "1",

note = "TMS 2026 Annual Meeting \& Exhibition : TMS 2026, TMS 2026 ; Conference date: 15-03-2026 Through 19-03-2026",

url = "https://www.tms.org/TMS2026/TMS2026/Default.aspx",

}

Moroz, M, Tesfaye, F, Demchenko, P, Prokhorenko, M, Rudyk, B, Prokhorenko, S, Imamaliyeva, S, Babanly, M & Reshetnyak, O 2026, Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System. in Energy Technology 2026 : Carbon Dioxide Management and Other Technologies. 1 edn, vol. 1, The Minerals, Metals & Materials Series, no. 1, vol. 1, Switzerland, pp. 1-7, TMS 2026 Annual Meeting & Exhibition, San Diego, California, United States, 15/03/26.

Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System. / Moroz, Mykola; Tesfaye, Fiseha; Demchenko, Pavlo et al.
Energy Technology 2026 : Carbon Dioxide Management and Other Technologies. Vol. 1 1. ed. Switzerland, 2026. p. 1-7 (The Minerals, Metals & Materials Series; Vol. 1, No. 1).

Research output: Chapter in Book/Conference proceeding › Published conference proceeding › Scientific › peer-review

TY - GEN

T1 - Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System

AU - Moroz, Mykola

AU - Tesfaye, Fiseha

AU - Demchenko, Pavlo

AU - Prokhorenko, Myroslava

AU - Rudyk, Bohdan

AU - Prokhorenko, Serhiy

AU - Imamaliyeva, Samira

AU - Babanly, Mahammad

AU - Reshetnyak, Oleksandr

N1 - Conference code: 155

PY - 2026

Y1 - 2026

N2 - The phase equilibria of the Ag–Pd–Ge–S system in the phase region Ge–GeS2–PdS2–PdS–Ag2PdS2 were established by advanced electromotive force (EMF) method. For the phase space studies and thermodynamic measurements, the following type of electrochemical cells (ECCs) were assembled: (−) С || Ag || SЕ || R(Ag+) || PЕ || С (+), where C is the graphite; Ag is the powdered silver; SE is the purely ionic Ag+ conductor (Ag2GeS3 glass); PE is the positive electrode; R(Ag+) is the diffusion region of the Ag+ ions from SE to PE. The values of the standard thermodynamic functions (Gibb’s energy, enthalpy, and entropy) of the Ag2PdGeS4 compound were established for the first time from the linear temperature dependencies of EMF of the ECCs. The thermodynamic data determined in this work will contribute to a better understanding of the studied chalcogenides and their user limitations.

AB - The phase equilibria of the Ag–Pd–Ge–S system in the phase region Ge–GeS2–PdS2–PdS–Ag2PdS2 were established by advanced electromotive force (EMF) method. For the phase space studies and thermodynamic measurements, the following type of electrochemical cells (ECCs) were assembled: (−) С || Ag || SЕ || R(Ag+) || PЕ || С (+), where C is the graphite; Ag is the powdered silver; SE is the purely ionic Ag+ conductor (Ag2GeS3 glass); PE is the positive electrode; R(Ag+) is the diffusion region of the Ag+ ions from SE to PE. The values of the standard thermodynamic functions (Gibb’s energy, enthalpy, and entropy) of the Ag2PdGeS4 compound were established for the first time from the linear temperature dependencies of EMF of the ECCs. The thermodynamic data determined in this work will contribute to a better understanding of the studied chalcogenides and their user limitations.

KW - Chalcogenide compounds

KW - Thermodynamic properties

KW - EMF method

KW - Gibbs energy

KW - Phase equilibria

M3 - Published conference proceeding

VL - 1

T3 - The Minerals, Metals & Materials Series

SP - 1

EP - 7

BT - Energy Technology 2026

CY - Switzerland

T2 - TMS 2026 Annual Meeting & Exhibition

Y2 - 15 March 2026 through 19 March 2026

ER -

Phase Equilibria and Thermodynamic Properties of Functional Chalcogenides in the Ag–Pd–Ge–S System

Abstract

Publication series

Conference

Keywords

UN SDGs

Fingerprint

Projects

GLCE: A step forward on greener and low-carbon extraction and recovery of non-ferrous metals

Activities

TMS 2026 Annual Meeting & Exhibition

Cite this