Effect of ionic liquid additives on oxygen evolution reaction and corrosion behavior of Pb-Ag anode in zinc electrowinning

Sorour, N.; Su, Chaoran; Ghali, Edward; Houlachi, Georges

doi:10.1016/j.electacta.2017.11.108

Cited by 24 publications

(3 citation statements)

References 30 publications

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“…6 It is worth noting that present Pb-Ag alloy anode exhibits many drawbacks including high OER overpotential, low mechanical strength, low service life and consumption of noble element Ag, which limits the advancement of zinc hydrometallurgy. [7][8][9][10] Therefore, it is urgent to design and synthesise a novel energysaving anode in zinc hydrometallurgy.…”

Section: Introductionmentioning

confidence: 99%

PbO₂ modified with TiO₂-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

et al. 2021

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Section: Introductionmentioning

confidence: 99%

PbO₂ modified with TiO₂-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

et al. 2021

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“…Lead and lead alloys are standard anode materials for nonferrous metal electrowinning due to their advantages of simple preparation, low cost, and acceptable stability. 1,2 At the initial stage of the electrowinning process, an oxide layer will gradually grow on the surface of the lead-based anode, and oxygen evolution reaction (OER) occurs simultaneously at the oxide layer/solution interface. 3 Due to the sluggish kinetics of the OER and the unsatisfactory oxygen evolution activity of lead compounds in the oxide layer, the overpotentials of lead-based anodes generally exceed 800 mV at 10∼50 mA cm −2 .…”

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confidence: 99%

Incorporating an Efficient Oxygen Evolution Catalyst of MnCo₂O_4.5 into a Pb Matrix as an Energy-Saving Anode for Metal Electrowinning

Zhong,

Ren,

Jiang

et al. 2023

J. Electrochem. Soc.

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Based on the outstanding catalytic activity and stability of Mn-Co bimetallic oxides toward oxygen evolution in acidic solutions, MnCo2O4.5 was incorporated into a Pb matrix through a powder pressing-sintering process to obtain a Pb-MnCo2O4.5 composite anode. Compared with the Pb anode that was made via the powder pressing-sintering process (PS-Pb), the oxide layer formed on the Pb-MnCo2O4.5 anode presented a higher flatness, compactness, and β-PbO2 concentration. Consequently, Pb-5.0MnCo2O4.5 presented a stable anodic potential of 1.235 V, approximately 170 mV lower than that of the PS-Pb anode. In the case of lower MnCo2O4.5 content (≤ 2.5%), the Pb-MnCo2O4.5 composite anode exhibited a smaller Tafel slope (70.39 ~ 79.59 mV dec−1) and a lower charge transfer resistance (0.437 ~ 0.676 Ω cm2). The fresh Pb-5.0MnCo2O4.5 composite anode showed a self-corrosion density of 0.25 mA cm−2, approximately 14.3% of that tested on the PS-Pb anode. However, Co2+ and Mn2+ were detected in the electrolyte during 72 h of electrowinning with the Pb-MnCo2O4.5 composite anode. In summary, the Pb-MnCo2O4.5 composite anode has the potential to reduce the energy consumption of the metal-electrowinning process. Nonetheless, it is necessary to evaluate the influence of dissolved Co2+ and Mn2+ on the cathodic process before commercial application

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“…The effect of silver content on the performance of electrodes has been studied by W. Zhang et al, 15 and the results showed that the overpotential of the electrode decreases and the corrosion resistance improves with increasing Ag content. N. Sorour, 16 R. Jaimes, 17 M. Mohammadi 18 and S. Wang 19 et al studied the electrochemical properties of Pb-Ag alloy anodes in different electrolytes, which provided a database for their industrial application. However, Pb-Ag alloy anodes also have some disadvantages, such as high cost and high oxygen evolution overpotential.…”

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confidence: 99%

Effect of the Sn Addition on the Electrochemical Properties of Al/Pb Anodes and Its Application in Zinc Electrowinning

Zhi-jun

Zhu

et al. 2021

ECS J. Solid State Sci. Technol.

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Al/Sn/Pb composite anode materials were prepared by the hot-pressing diffusion method to improve their electrochemical properties. The bonding interface, electrochemical properties, and application properties in the zinc electrowinning process of the composite electrode materials were tested and analyzed. The results indicate that an improvement of the corrosion resistance of the electrode material, a more uniform distribution of the surface potential, and an enhancement of the electrochemistry have been achieved by changing the structure of the electrode. The cell voltage of the Al/Sn/Pb composite anode decreased by 0.169 V compared with that of the Pb alloy electrode in the zinc electrowinning engineering experiment. Its current efficiency is increased by 8.5%, its specific electric energy consumption is reduced by 11.4%, and its corrosion rate is reduced by 57.3%. The surface quality of the cathode-precipitated products is good, the impurity content is low, and the impurity Pb content is decreased by 35.59% compared to the Pb alloy electrode.

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Effect of ionic liquid additives on oxygen evolution reaction and corrosion behavior of Pb-Ag anode in zinc electrowinning

Cited by 24 publications

References 30 publications

PbO₂ modified with TiO₂-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

PbO₂ modified with TiO₂-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

Incorporating an Efficient Oxygen Evolution Catalyst of MnCo₂O_4.5 into a Pb Matrix as an Energy-Saving Anode for Metal Electrowinning

Effect of the Sn Addition on the Electrochemical Properties of Al/Pb Anodes and Its Application in Zinc Electrowinning

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Effect of ionic liquid additives on oxygen evolution reaction and corrosion behavior of Pb-Ag anode in zinc electrowinning

Cited by 24 publications

References 30 publications

PbO2 modified with TiO2-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

PbO2 modified with TiO2-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

Incorporating an Efficient Oxygen Evolution Catalyst of MnCo2O4.5 into a Pb Matrix as an Energy-Saving Anode for Metal Electrowinning

Effect of the Sn Addition on the Electrochemical Properties of Al/Pb Anodes and Its Application in Zinc Electrowinning

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PbO₂ modified with TiO₂-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

PbO₂ modified with TiO₂-NTs composite materials with enhanced OER electrocatalytic activity for Zn electrowinning

Incorporating an Efficient Oxygen Evolution Catalyst of MnCo₂O_4.5 into a Pb Matrix as an Energy-Saving Anode for Metal Electrowinning