The breakdown of PbO2-Ti anodes

Gilroy, D.

doi:10.1007/bf00616899

Cited by 18 publications

(7 citation statements)

References 12 publications

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“…Electrode Life Enhancement by Electrode Modification. Common β-PbO2 electrode is limited in application for wastewater treatment due to its relatively short electrode life, and the evolution of oxygen on the anode is usually one of the major reasons (27). It was reported that the electrode modified by fluorine could convert the activated substrates to hydroxyl radical in adsorbed state and help to reduce active oxygen atom diffusing into the coating layer (28).…”

Section: Resultsmentioning

confidence: 99%

Long Life Modified Lead Dioxide Anode for Organic Wastewater Treatment: Electrochemical Characteristics and Degradation Mechanism

Zhou

Dai

Lei

et al. 2004

Environ. Sci. Technol.

259

103

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Recent studies have shown that the lack of ideal anodes with both good activity and stability is still one of the critical problems in electrochemical oxidation for organic wastewater treatment. The electrochemical properties, the activity and stability for anodic oxidation of various phenolic compounds, and the degradation mechanism on a novel β-PbO 2 electrode modified with fluorine resin were investigated. The anode life after modification was greatly improved to be more than 10 yr in common electrochemical current conditions. Such an anode was effective for partial degradation of phenolic compounds, but selective because reactive activities were varied with different substituents. Characterized by SEM and XRD, the crystal form of the anode was verified to be mainly β-PbO 2 , and it hardly changed when used for p-nitrophenol degradation for around 320 h although there existed slow electrode corrosion. The active species generated during anodic oxidation were determined to be mainly hydroxyl radical and little ozone. The reactions between hydroxyl radical and phenolic compounds were proved to be electrophilic reactions, based on which a general electrochemical degradation mechanism for aromatic compounds was proposed. In general, such a novel anode has a good performance for organics degradation with perfect electrode life, showing potential for environmental application.

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Section: Resultsmentioning

confidence: 99%

Long Life Modified Lead Dioxide Anode for Organic Wastewater Treatment: Electrochemical Characteristics and Degradation Mechanism

Zhou

Dai

Lei

et al. 2004

Environ. Sci. Technol.

259

103

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“…These studies deal with numerous subjects such as performance characteristics as an anode material [11], physicochemical properties [12], electrocatalytic behaviour [13,14] and structural changes [15]. Some problems related to the stability of the lead dioxide coating have been reported [16,17]. Improvements of the performance of this anode depend on the structure and properties of the lead dioxide film [18,19].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Electrocrystallization of PbO[sub 2] on Glassy Carbon Electrodes Partial Inhibition of the Progressive Three-Dimensional Nucleation and Growth

González-Garcı́a

Gallud

Iniesta

et al. 2000

J. Electrochem. Soc.

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SUMMARYElectrocrystallization of PbO 2 on glassy carbon electrodes was studied in 1 M HNO 3 + 0.1 M Pb(NO 3 ) 2 using cyclic voltammetry, rotating disk electrode, chronoamperometry and scanning electron microscopy. In order to explain the experimental curves a new theory of threedimensional nucleation and progressive growth was developed and applied to analyse the experimental chronoamperometric curves. Numerical approximations led to the determination of kinetic parameters.

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“…The real service life of anodes is usually assessed under accelerated life test conditions by the equation: SL ∝ j -n , where SL is the service life (h), j is the current density (A cm −2 ), and n = 1.4-2.0. 54,55 In other words, the corrosion rates of different anodes will be significant at high current density. Pb20POM had a similar stability to both pure Pb and Pb0.75Ag, but with a lower overpotential.…”

Section: Resultsmentioning

confidence: 99%

Polyoxometalate/Lead Composite Anode for Efficient Oxygen Evolution in Zinc Electrowinning

Yang

2019

J. Electrochem. Soc.

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Oxygen evolution in harsh high-acidic conditions has always been a challenge for both zinc electrowinning and hydrogen production. Lead and its alloys have met the requirements of zinc electrowinning up to now. This is the first time that a polyoxometalate/lead composite as an earth-abundant material has been investigated for use as anode in zinc electrowinning. A polyoxometalate/lead composite showed a high electrocatalytic activity and a long-term durability during an oxygen generation reaction in harsh high-acidic conditions of electrochemical accelerated corrosion tests. It could boost oxygen evolution by decreasing the Gibbs energy barriers of intermediates and showed a 10-fold higher electrochemically active surface area and one fifth of the polarization resistance compared to pure Pb. The overpotential of a Pb anode containing 1 wt % polyoxometalate was similar to that of a commercial Pb/0.75 wt % Ag anode, which implies the potential application of polyoxometalate/lead composite anodes in the hydrometallurgical industry.

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The breakdown of PbO2-Ti anodes

Cited by 18 publications

References 12 publications

Long Life Modified Lead Dioxide Anode for Organic Wastewater Treatment: Electrochemical Characteristics and Degradation Mechanism

Long Life Modified Lead Dioxide Anode for Organic Wastewater Treatment: Electrochemical Characteristics and Degradation Mechanism

Kinetics of Electrocrystallization of PbO[sub 2] on Glassy Carbon Electrodes Partial Inhibition of the Progressive Three-Dimensional Nucleation and Growth

Polyoxometalate/Lead Composite Anode for Efficient Oxygen Evolution in Zinc Electrowinning

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