Synthesis and structural analysis of electrodeposited Pb-Co films for oxygen evolution applications

Maril, Marisol; Tobosque, Pablo; Núñez, Jorge; Rodríguez, Carlos Aníbal; Delplancke, Marie-Paule; Delplancke, Jean‐Luc; Yacamán, Miguel José; Arellano-Jiménez, M. Josefina; Soldera, F.; Carrasco, Claudia

doi:10.1016/j.matchar.2018.12.031

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…In fact, the overpotential of the Pb-Co-Sn anode is of ~0.27 V, a value that is near 68% lower than the overpotential of the conventional Pb-Ca-Sn anode, which is ~0.87 V. 24 On the other hand, it has been reported an overpotential of only ~0.3 V for a Pb-Co anode. 8 This overpotential is quite similar to the value found for the developed Pb-Co-Sn anode, however, as is seen in Fig. 5a, the current reached by Pb-Co-Sn anode is considerable higher.…”

Section: Resultssupporting

confidence: 86%

“…In this sense, it is proposed that the nanometric nature of the Pb-Co-Sn film is one of the reasons of its electrocatalytic performance because almost all of the total surface acts as active sites for the OER. 8 Furthermore, to evaluate the stability of the Pb-Co-Sn film, additional experiments were carried out in an electrolyte containing 1.8 M H 2 SO 4 , similar to those reported by Barmi et al, 12 but at a higher constant current density of 500 Am −2 . The experimental behavior is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…10 The pH was selected to ensure a high conductivity in the electrolyte and to avoid metallichydroxide formation. 8,11 Anodic electrodeposition was carried out potentiostatically by applying 1.7 V for 600 s at room temperature. After electrodeposition, the film was washed with distilled water, rinsed with alcohol and dried at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…[5][6][7] In this sense, some electrodes synthesized with these elements are Pb-Co films, with which a high decrease in the overpotential required for the OER has been achieved. 8,9 However, the current efficiency to evolve oxygen at high current densities is not competitive with commercial electrodes used in water electrolysis (1 Acm −2 ). Nevertheless, at low current densities their performance is acceptable.…”

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confidence: 99%

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Low-Cost Pb-Co-Sn film for the Oxygen Evolution Reaction in Acid Media

Maril

Tobosque

Cisternas

et al. 2021

J. Electrochem. Soc.

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The oxygen evolution reaction (OER) plays an important role in several industrial processes. However, the high overpotential that the OER requires to take place, has resulted in high costs associated with precious metals used in anodes that catalyze this reaction. Substitute elements, among them Co, have been investigated in order to decrease their price, herein, highlight Pb-Co electrodes that achieved an important decrease in the overpotential needed for the OER. Even though the electrocatalyst ability showed by the Pb-Co anode was considerably high, the current densities achieved were too low to compete with commercial anodes. Therefore, the efficiency to produce O2 should be increased. The aim of this work was to develop a Pb-Co-Sn film, through anodic electrodeposition, that enables an efficient production of O2 coupled with stability, low-cost and low overpotential. In order to know the morphological, microstructural and chemical composition, a full characterization of the developed film was carried out. The obtained Pb-Co-Sn film showed higher electrochemical performance than conventional Pb-Ca-Sn anodes, with an overpotential of ∼0.27 V vs NHE at 500 Am−2, 68% lower than a conventional Pb-Ca-Sn anode.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Low-Cost Pb-Co-Sn film for the Oxygen Evolution Reaction in Acid Media

Maril

Tobosque

Cisternas

et al. 2021

J. Electrochem. Soc.

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“…9,10 Similarly, the Karbasi group developed Pb-Co anodes using the accumulative roll bonding method. [11][12][13] The Pb-0.5%Co anode showed a significantly lower corrosion rate, product and electrolyte contamination, slime formation and energy consumption.…”

mentioning

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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Synthesis and characterization of nanostructured Pb-Co-Sn film for the oxygen evolution reaction in sulfuric acid media

et al. 2021

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Synthesis and structural analysis of electrodeposited Pb-Co films for oxygen evolution applications

Cited by 8 publications

References 20 publications

Low-Cost Pb-Co-Sn film for the Oxygen Evolution Reaction in Acid Media

Low-Cost Pb-Co-Sn film for the Oxygen Evolution Reaction in Acid Media

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

Synthesis and characterization of nanostructured Pb-Co-Sn film for the oxygen evolution reaction in sulfuric acid media

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Synthesis and structural analysis of electrodeposited Pb-Co films for oxygen evolution applications

Cited by 8 publications

References 20 publications

Low-Cost Pb-Co-Sn film for the Oxygen Evolution Reaction in Acid Media

Low-Cost Pb-Co-Sn film for the Oxygen Evolution Reaction in Acid Media

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

Synthesis and characterization of nanostructured Pb-Co-Sn film for the oxygen evolution reaction in sulfuric acid media

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