Electrochemical recycling of Pd and Ag from simulated high-level liquid waste

You bin WANG; Rui ZOU; Yue zhou WEI; Tsuyoshi ARAI; Toyohisa FUJITA

doi:10.1016/S1003-6326(22)65852-7

Electrochemical recycling of Pd and Ag from simulated high-level liquid waste

You bin WANG, Rui ZOU, Yue zhou WEI, Tsuyoshi ARAI, Toyohisa FUJITA

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

1 Citation (Scopus)

Abstract

For the recycling of Pd and Ag from high-level liquid waste (HLLW), the electrochemical behaviors of Pd and Ag in the simulated HNO₃ solutions were investigated by cyclic voltammetry and potentiostatic deposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to observe the deposits morphology and to evaluate their composition. The results indicate that the formation of NO₂⁻ helps to dissolve Ag while Ag is electrodeposited. When Pd and Ag are electrodeposited together, more metals are gained in the same time, and the deposited Ag does not dissolve in this situation. The metals are electrodeposited completely at the potentials from −0.4 to −0.6 V (vs MSE) and the deposits contain Ag and PdH_x. The electrodeposition of Pd can boost hydrogen evolution, and then the reaction between H₂ and NO₂⁻ is sped up, thereby lowering the concentration of NO₂⁻ and inhibiting the dissolution of Ag.

Original language	English
Pages (from-to)	1031-1040
Number of pages	10
Journal	Transactions of Nonferrous Metals Society of China
Volume	32
Issue number	3
DOIs	https://doi.org/10.1016/S1003-6326(22)65852-7
Publication status	Published - 2022 Mar

Keywords

electrodeposition
metals recovery
morphology characteristics
nitrite generation
promoting effect

ASJC Scopus subject areas

Condensed Matter Physics
Geotechnical Engineering and Engineering Geology
Metals and Alloys
Materials Chemistry

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title = "Electrochemical recycling of Pd and Ag from simulated high-level liquid waste",

abstract = "For the recycling of Pd and Ag from high-level liquid waste (HLLW), the electrochemical behaviors of Pd and Ag in the simulated HNO3 solutions were investigated by cyclic voltammetry and potentiostatic deposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to observe the deposits morphology and to evaluate their composition. The results indicate that the formation of NO2− helps to dissolve Ag while Ag is electrodeposited. When Pd and Ag are electrodeposited together, more metals are gained in the same time, and the deposited Ag does not dissolve in this situation. The metals are electrodeposited completely at the potentials from −0.4 to −0.6 V (vs MSE) and the deposits contain Ag and PdHx. The electrodeposition of Pd can boost hydrogen evolution, and then the reaction between H2 and NO2− is sped up, thereby lowering the concentration of NO2− and inhibiting the dissolution of Ag.",

keywords = "electrodeposition, metals recovery, morphology characteristics, nitrite generation, promoting effect",

author = "WANG, {You bin} and Rui ZOU and WEI, {Yue zhou} and Tsuyoshi ARAI and Toyohisa FUJITA",

note = "Funding Information: The authors are grateful for the financial supports from the National Natural Science Foundation of China (No. 11975082). Publisher Copyright: {\textcopyright} 2022 The Nonferrous Metals Society of China",

year = "2022",

month = mar,

doi = "10.1016/S1003-6326(22)65852-7",

language = "English",

volume = "32",

pages = "1031--1040",

journal = "Transactions of Nonferrous Metals Society of China",

issn = "1003-6326",

publisher = "Nonferrous Metals Society of China",

number = "3",

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TY - JOUR

T1 - Electrochemical recycling of Pd and Ag from simulated high-level liquid waste

AU - WANG, You bin

AU - ZOU, Rui

AU - WEI, Yue zhou

AU - ARAI, Tsuyoshi

AU - FUJITA, Toyohisa

N1 - Funding Information: The authors are grateful for the financial supports from the National Natural Science Foundation of China (No. 11975082). Publisher Copyright: © 2022 The Nonferrous Metals Society of China

PY - 2022/3

Y1 - 2022/3

N2 - For the recycling of Pd and Ag from high-level liquid waste (HLLW), the electrochemical behaviors of Pd and Ag in the simulated HNO3 solutions were investigated by cyclic voltammetry and potentiostatic deposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to observe the deposits morphology and to evaluate their composition. The results indicate that the formation of NO2− helps to dissolve Ag while Ag is electrodeposited. When Pd and Ag are electrodeposited together, more metals are gained in the same time, and the deposited Ag does not dissolve in this situation. The metals are electrodeposited completely at the potentials from −0.4 to −0.6 V (vs MSE) and the deposits contain Ag and PdHx. The electrodeposition of Pd can boost hydrogen evolution, and then the reaction between H2 and NO2− is sped up, thereby lowering the concentration of NO2− and inhibiting the dissolution of Ag.

AB - For the recycling of Pd and Ag from high-level liquid waste (HLLW), the electrochemical behaviors of Pd and Ag in the simulated HNO3 solutions were investigated by cyclic voltammetry and potentiostatic deposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to observe the deposits morphology and to evaluate their composition. The results indicate that the formation of NO2− helps to dissolve Ag while Ag is electrodeposited. When Pd and Ag are electrodeposited together, more metals are gained in the same time, and the deposited Ag does not dissolve in this situation. The metals are electrodeposited completely at the potentials from −0.4 to −0.6 V (vs MSE) and the deposits contain Ag and PdHx. The electrodeposition of Pd can boost hydrogen evolution, and then the reaction between H2 and NO2− is sped up, thereby lowering the concentration of NO2− and inhibiting the dissolution of Ag.

KW - electrodeposition

KW - metals recovery

KW - morphology characteristics

KW - nitrite generation

KW - promoting effect

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ER -

Electrochemical recycling of Pd and Ag from simulated high-level liquid waste

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Keywords

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