Potentiometric study of the interaction of Sm3+ and O2− ions: thermodynamic properties of samarium compounds in molten NaCl-2CsCl eutectic

Henan Zhang; Qi Liu; Alena Novoselova; Valeri Smolenski; Kewei Jiang; Yongde Yan; Milin Zhang; Jun Wang

doi:10.1039/d4nj00537f

Potentiometric study of the interaction of Sm³⁺ and O²⁻ ions: thermodynamic properties of samarium compounds in molten NaCl-2CsCl eutectic

Henan Zhang, Qi Liu^*, Alena Novoselova^*, Valeri Smolenski, Kewei Jiang^*, Yongde Yan, Milin Zhang, Jun Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The reactions of oxygen and samarium ions in molten NaCl-2CsCl eutectic in the temperature range of 823-913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y₂O₃-stabilized ZrO₂ with a solid-electrolyte membrane. The titration of Sm³⁺ by O²⁻ ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm₂O₃ was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm₂O₃ in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm₂O₃ in molten NaCl-2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO²⁻) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO²⁻ diagram of Sm.

Original language	English
Pages (from-to)	12146-12152
Number of pages	7
Journal	New Journal of Chemistry
Volume	48
Issue number	27
DOIs	https://doi.org/10.1039/d4nj00537f
Publication status	Published - 19 Jun 2024
Externally published	Yes

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10.1039/d4nj00537f

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@article{4140e46f4a0647df826091cfd397bcf4,

title = "Potentiometric study of the interaction of Sm3+ and O2− ions: thermodynamic properties of samarium compounds in molten NaCl-2CsCl eutectic",

abstract = "The reactions of oxygen and samarium ions in molten NaCl-2CsCl eutectic in the temperature range of 823-913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid-electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl-2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.",

author = "Henan Zhang and Qi Liu and Alena Novoselova and Valeri Smolenski and Kewei Jiang and Yongde Yan and Milin Zhang and Jun Wang",

note = "Publisher Copyright: {\textcopyright} 2024 The Royal Society of Chemistry.",

year = "2024",

month = jun,

day = "19",

doi = "10.1039/d4nj00537f",

language = "English",

volume = "48",

pages = "12146--12152",

journal = "New Journal of Chemistry",

issn = "1144-0546",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Potentiometric study of the interaction of Sm3+ and O2− ions

T2 - thermodynamic properties of samarium compounds in molten NaCl-2CsCl eutectic

AU - Zhang, Henan

AU - Liu, Qi

AU - Novoselova, Alena

AU - Smolenski, Valeri

AU - Jiang, Kewei

AU - Yan, Yongde

AU - Zhang, Milin

AU - Wang, Jun

PY - 2024/6/19

Y1 - 2024/6/19

N2 - The reactions of oxygen and samarium ions in molten NaCl-2CsCl eutectic in the temperature range of 823-913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid-electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl-2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.

AB - The reactions of oxygen and samarium ions in molten NaCl-2CsCl eutectic in the temperature range of 823-913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid-electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl-2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.

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U2 - 10.1039/d4nj00537f

DO - 10.1039/d4nj00537f

M3 - Article

AN - SCOPUS:85196527541

SN - 1144-0546

VL - 48

SP - 12146

EP - 12152

JO - New Journal of Chemistry

JF - New Journal of Chemistry

IS - 27

ER -

Potentiometric study of the interaction of Sm³⁺ and O²⁻ ions: thermodynamic properties of samarium compounds in molten NaCl-2CsCl eutectic

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