Electrochemical and anodic behaviors of MnO2/Pb nanocomposite in zinc electrowinning

Karbasi, Masoud; Alamdari, Eskandar Keshavarz; Dehkordi, Elahe Amirkhani; Tavangarian, Fariborz

doi:10.1007/s10800-018-1163-9

Cited by 18 publications

(6 citation statements)

References 27 publications

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“…Note that Karbasi et al reported that pure Pb yields a resistance value of around 12 Ωcm 2 . [ 64 ] In addition, Khatbi et al reported similar values for lead‐aluminum casting alloys for lead‐acid batteries. [ 65 ] CPE values for both samples are in the same order of magnitude, due to similar dielectric properties of the residual layer formed on its surface.…”

Section: Resultsmentioning

confidence: 98%

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Electrochemical impedance spectroscopy evaluation of nonthermal plasma restoration for ductile metals in cultural heritage artifacts

Giménez‐Barrera

Colominas

Borrós³

2023

Plasma Processes & Polymers

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Despite the large number of studies devoted to understanding the degradation process of ductile metals in cultural heritage, there is still a lack of consolidated protocols for their restoration. Traditional restorations such as chemical cleaning and electrochemical treatments are carried out for the recovery of corroded ductile metals. However, these techniques are usually very aggressive to the metallic surface. For this reason, a cold plasma design is presented to restore ductile metals through the minimum intervention criterion. Lead samples were induced to atmospheric acetic acid corrosion to recreate models of degradation for practical restoration and characterization. The material after plasma treatment was analyzed with different techniques of characterization, including electrochemical impedance spectroscopy. The present work demonstrated the potential of this technique to provide an accurate analysis of its surface.

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Section: Resultsmentioning

confidence: 98%

“…It is also worth mentioning that the noncorroded lead electrode showed a similar resistive surface, yielding an Rf value of 12.4 Ωcm 2 . Note that Karbasi et al reported that pure Pb yields a resistance value of around 12 Ωcm 2 [64]. In addition, Khatbi et al reported similar values for leadaluminum casting alloys for lead-acid batteries [65].…”

mentioning

confidence: 84%

Electrochemical impedance spectroscopy evaluation of nonthermal plasma restoration for ductile metals in cultural heritage artifacts

Giménez‐Barrera

Colominas

Borrós³

2023

Plasma Processes & Polymers

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“…Lead (Pb) was selected as an electrowinning anode due to its relatively high corrosion resistance in a sulfuric acid bath [ 4 ]. However, it has some disadvantages such as low yield strength, tensile strength, hardness, and creep resistance, which decrease anode lifespans and raise the cost of production [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanical Properties and Microstructure of Accumulative Roll-Bonded Co/Pb Nanocomposite

et al. 2021

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Lead composites have been used as anodes in the electrowinning process to produce metals such as copper and zinc. Manufacturing stable lead anodes with appropriate mechanical and chemical properties is required to improve the performance of the electrowinning process. In this study, an accumulative roll bonding (ARB) method was used to fabricate a Co/Pb nanocomposite. Utilizing the ARB method can help us to achieve a uniform structure with enhanced mechanical properties via severe plastic deformation. The results showed that suitable tensile properties were obtained in Pb–0.5%Co–10pass samples. The tensile strength and strain of these samples were 2.51 times higher and 83.7% lower than that of as-cast pure Pb. They also showed creep resistance and hardness up to 1.8 and 2.5 times more than that of as-cast pure Pb. The ARB technique uniformly distributed Co particles in the Pb matrix. The enhanced strength of Pb samples was observed in the composite including grain sizes of less than 50 nm as a result of hindering the recovery phenomenon. The particle size of the Co distributed in the Pb matrix was 353 ± 259 nm. Compared to conventional methods, the ARB process improved the mechanical properties of Co/Pb composites and can open a new horizon to fabricating this composite in metal industries.

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“…3,11,12 Many studies were conducted on the fabrication of nanocomposite anodes to increase their current density, service life, and energy efficiency in electrowinning industries. 13,14 Wang et al 13 fabricated an innovative Co 3 O 4 -and CNT-doped 3D-Ti/PbO 2 electrode to enhance current efficiency and service life, as well as reducing the OER overpotential and cell voltage in zinc electrowinning, while Zhao et al 15 produced graphene−Co 3 O 4 nanocomposite as an efficient electrocatalyst for the OER.…”

Section: Introductionmentioning

confidence: 99%

“…The electrochemical activity of anodes toward the OER is affected not only by the chemical composition of the anode but also by its particle size and morphology. Hence, nanomaterials that provide available sites for electrochemical reactions have been used to modify the electrodes and improve their electrochemical properties. ,, Many studies were conducted on the fabrication of nanocomposite anodes to increase their current density, service life, and energy efficiency in electrowinning industries. , Wang et al fabricated an innovative Co 3 O 4 - and CNT-doped 3D-Ti/PbO 2 electrode to enhance current efficiency and service life, as well as reducing the OER overpotential and cell voltage in zinc electrowinning, while Zhao et al produced graphene–Co 3 O 4 nanocomposite as an efficient electrocatalyst for the OER.…”

Section: Introductionmentioning

confidence: 99%

Effect of a Synthesized Pulsed Electrodeposited Ti/PbO₂–RuO₂ Nanocomposite on Zinc Electrowinning

Hakimi

Rashchi

Ghalekhani

et al. 2021

Ind. Eng. Chem. Res.

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Nowadays, there is a growing interest in synthesizing electrodes used in zinc electrowinning, increasing active surface area, decreasing specific energy consumption, and the oxygen evolution reaction (OER) overpotential. In this study, modified nanocomposite anodes were synthesized by applying pulsed and constant direct current electrodeposition to improve the catalytic activity of the electrodes toward the oxygen evolution reaction (OER) and reduce energy consumption in zinc electrowinning. By decreasing particle size, the active surface area of PbO2–RuO2 nano-mixed composite electrode was 2.88 and 14.22 times greater than PbO2–RuO2 microcomposite and pure PbO2 electrodes, respectively. Also, the anodic polarization of PbO2–RuO2 microcomposite showed a 0.201 V decrease at 0.01 A cm–2 in the OER overpotential as compared to pure micro PbO2. Among the synthesized anodes, the Ti/PbO2–RuO2 nano-mixed morphology composite anode possessed the lowest overpotential and the least specific energy consumption by 0.705 V at a current density of 0.14 A cm–2 and 2.11 kWh kg–1, respectively.

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Electrochemical and anodic behaviors of MnO2/Pb nanocomposite in zinc electrowinning

Cited by 18 publications

References 27 publications

Electrochemical impedance spectroscopy evaluation of nonthermal plasma restoration for ductile metals in cultural heritage artifacts

Electrochemical impedance spectroscopy evaluation of nonthermal plasma restoration for ductile metals in cultural heritage artifacts

Enhanced Mechanical Properties and Microstructure of Accumulative Roll-Bonded Co/Pb Nanocomposite

Effect of a Synthesized Pulsed Electrodeposited Ti/PbO₂–RuO₂ Nanocomposite on Zinc Electrowinning

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Electrochemical and anodic behaviors of MnO2/Pb nanocomposite in zinc electrowinning

Cited by 18 publications

References 27 publications

Electrochemical impedance spectroscopy evaluation of nonthermal plasma restoration for ductile metals in cultural heritage artifacts

Electrochemical impedance spectroscopy evaluation of nonthermal plasma restoration for ductile metals in cultural heritage artifacts

Enhanced Mechanical Properties and Microstructure of Accumulative Roll-Bonded Co/Pb Nanocomposite

Effect of a Synthesized Pulsed Electrodeposited Ti/PbO2–RuO2 Nanocomposite on Zinc Electrowinning

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Product

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Effect of a Synthesized Pulsed Electrodeposited Ti/PbO₂–RuO₂ Nanocomposite on Zinc Electrowinning