Effect of Interfacial Oxides on the Electrochemical Activity of Lead Dioxide Film Electrodes on a Ti Substrate

Yeo, In-Hyeong; Wen, Sun; Mho, Sun‐il

doi:10.2116/analsci.26.39

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Advanced electrochemical water treatments preferably require the β-phase because its porous structure provides a larger active surface area for anodic applications; therefore, the increase in the active surface area will elevate the formation of OH Å radicals and will favorite the degradation of organic compounds [54]. However, the co-existence of α-and β-PbO 2 phases is very necessary to improve the electrochemical performance of the positive electrode [38], and both of these forms in anodic layer depend strongly, not only on the preparation conditions (pH-medium and temperature), but also on the technical preparation [55]. Thus, and as expected, the electrolysis properties of Pb/PbO 2 electrode are more efficient than the AS30/PbO 2 electrode and that could have been better if its life service is longer (low adherence persistence).…”

Section: Degradation Test On Pbo 2 Anodes: Bulk Electrolysismentioning

confidence: 99%

Interface behavior of PbO₂on pure lead and stainless steel as anode for dye degradation

Elaissaoui

Akrout

Bousselmi

2015

Desalination and Water Treatment

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A B S T R A C TPbO 2 films are electrodeposited by the galvanostatic (G) and pulsed current (P) methods on lead and stainless steel (AS30), respectively. They are used as electrodes for electrochemical degradation of Amaranth dye. The scanning electron microscope, atomic force microscope, and X-ray diffraction analyses revealed the dominance of β-PbO 2 form in two anodes and the absence of the form tet-PbO and PbSO 4 in AS30 substrate that have more amorphous shape and less roughness (200 nm). A poor lead oxide adhesion on AS30 substrate is detected. Cyclic voltammetry results showed that the absence of oxidation peak in the case of AS30/PbO 2 anode is related to the oxidation of PbSO 4 to β-PbO 2 . EIS results demonstrated that the pH influences largely PbO 2 layer. Concerning E123 degradation, 95 and 91% of color removal (82 and 76% of Chemical oxygen demand removals) were achieved using Pb/PbO 2 and AS30/PbO 2 anodes, respectively. In this case, current efficiency has kept relatively a high value assuming less energy consumption.

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Section: Degradation Test On Pbo 2 Anodes: Bulk Electrolysismentioning

confidence: 99%

Interface behavior of PbO₂on pure lead and stainless steel as anode for dye degradation

Elaissaoui

Akrout

Bousselmi

2015

Desalination and Water Treatment

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“…Hence, in order to prevent the growth of TiO 2 on the surface of the titanium substrate and thereby improve the stability of the coated anode, a lead interlayer (Yeo et al, 2010) was added to the anode structure in A C C E P T E D M A N U S C R I P T…”

Section: Pbo 2 -Coo X Composite Coated Anodesmentioning

confidence: 99%

“…On the other hand, IrO 2 is more expensive than RuO 2 and its electrocatalytic activity is slightly lower (Chen et al, 2001). As anodes with a lead dioxide coating possess high electrical conductivity, good electrochemical and chemical stability against corrosion and are relatively inexpensive, researchers have long considered using lead dioxide as a surface layer on a Ti substrate, with the lead dioxide sometimes doped with other metal oxides such as ZrO 2 , TiO 2 , Ta 2 O 5 , CoO x , Co 3 O 4 , RuO 2 and others (Velichenko et al, 2009a(Velichenko et al, , 2009b(Velichenko et al, and 2009cYeo et al, 2010;Morimitsu et al, 2010;Cattarin et al, 2001;Musiani et al, 1997;Bertoncello et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Novel lead–cobalt composite anodes for copper electrowinning

Nikoloski

Barmi

2013

Hydrometallurgy

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PbO 2 -CoO x and PbO 2 -Co 3 O 4 composite coated anodes, using titanium and nickel substrates, have been successfully prepared and tested under typical copper electrowinning conditions. The aim of depositing a well-adhered composite coating onto the surface of the titanium and nickel substrate materials was pursued using three different coatings. The performance of the produced anodes was examined in terms of oxygen evolution potential and service life. Both of the anodes with PbO 2 -CoO x or PbO 2 -Co 3 O 4 deposited on titanium resulted in reduction of the oxygen evolution potential of 300 to 400 mV compared with a conventional PbCaSn anode. The anodes prepared by applying the same coatings onto a nickel substrate showed poor stability in the acidic electrolyte media used in this experiment to represent typical copper electrowinning conditions. Of the different coatings tested, a combination of thermal deposition of a SnO 2 -Sb 2 O 3 interlayer on the surface of a titanium substrate followed by electrodeposition of the top layer of the composite coating resulted in the best electrochemical activity and service life for the anodes. A Tafel slope of 88 mV dec -1 was recorded for the anode with a top coating of PbO 2 -CoO x and 47 mV dec -1 for the anode with a top coating of PbO 2 -Co 3 O 4 , which both compare favourably to the 122 mV dec -1 which was observed for a conventional PbCaSn anode. Anodisation tests were carried out for a period of 16 hours both in the presence and in the absence of the organic additive thiourea in the electrolyte. Corrosion rates were estimated from these tests and the results showed that the titanium based anode with a SnO 2 -Sb 2 O 3 interlayer and PbO 2 -CoO x coating has a lower corrosion rate than a conventional PbCaSn anode, whereas the corrosion rate of the titanium based anode with same interlayer and PbO 2 -Co 3 O 4 coating might be much greater but this remains to be confirmed. The results also showed that the addition of thiourea appears to increase the corrosion rate of the composite coated anodes although it reduces the corrosion rate of a PbCaSn anode. Thiourea showed no obvious effect on the anode potential.

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Metal oxide-coated anodes in wastewater treatment

Rao

Venkatarangaiah

2013

Environ Sci Pollut Res

210

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Electrochemical oxidation is an effective wastewater treatment method. Metal oxide-coated substrates are commonly used as anodes in this process. This article compiles the developments in the fabrication, application, and performance of metal oxide anodes in wastewater treatment. It summarizes the preparative methods and mechanism of oxidation of organics on the metal oxide anodes. The discussion is focused on the application of SnO2, PbO2, IrO2, and RuO2 metal oxide anodes and their effectiveness in wastewater treatment process.

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Effect of Interfacial Oxides on the Electrochemical Activity of Lead Dioxide Film Electrodes on a Ti Substrate

Cited by 4 publications

References 14 publications

Interface behavior of PbO₂on pure lead and stainless steel as anode for dye degradation

Interface behavior of PbO₂on pure lead and stainless steel as anode for dye degradation

Novel lead–cobalt composite anodes for copper electrowinning

Metal oxide-coated anodes in wastewater treatment

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Effect of Interfacial Oxides on the Electrochemical Activity of Lead Dioxide Film Electrodes on a Ti Substrate

Cited by 4 publications

References 14 publications

Interface behavior of PbO2on pure lead and stainless steel as anode for dye degradation

Interface behavior of PbO2on pure lead and stainless steel as anode for dye degradation

Novel lead–cobalt composite anodes for copper electrowinning

Metal oxide-coated anodes in wastewater treatment

Contact Info

Product

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About

Interface behavior of PbO₂on pure lead and stainless steel as anode for dye degradation

Interface behavior of PbO₂on pure lead and stainless steel as anode for dye degradation