Formation Mechanism of Non-conductive PbSO&lt;sub&gt;4&lt;/sub&gt; on IrO&lt;sub&gt;2&lt;/sub&gt;-Ta&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt;/Ti Anodes in Copper Foil Production

Kawaguchi, Kenji; Morimitsu, Masatsugu

doi:10.4139/sfj.66.282

Cited by 2 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8 was generated by the reduction of PbO 2 by a local cell (PbO 2 cathode and IrO 2 -Ta 2 O 5 anode) formed immediately after the electrolysis was stopped. 55 Figure 9 shows the surface morphologies of the four types of IrO 2 -Ta 2 O 5 /Ti anodes (A, D, E, and F) after the electrolysis test. Even though we did not observe any deposits after electrolysis on the surfaces of Anode A (Ir = 80 mol%) and Anode D (Ir = 50 mol %) that were prepared at 380 °C (Figs.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Reaction Selectivity of IrO₂-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Kawaguchi

Morimitsu

2020

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

The present study demonstrated that novel IrO2-Ta2O5/Ti anodes prepared by thermal decomposition at a low temperature of 380 °C have high reaction selectivity for oxygen evolution and metal oxide deposition in acidic aqueous solutions. Conventional IrO2-Ta2O5/Ti anodes are generally prepared at a temperature between 450 °C and 500 °C. However, if Pb(II) ions are present as an impurity in the electrolyte, the oxidation of Pb(II) ions occurs as an anodic side reaction, leading to deposition of PbO2 onto the conventional anodes. Herein, we prepared IrO2-Ta2O5/Ti anodes by thermal decomposition at the low temperature of 380 °C and investigated their crystallographic structure, surface morphology, and polarization behaviors for oxygen evolution as well as their suppression effect for anodic PbO2 deposition in sulfuric acid/lead sulfate solutions. SEM observations with low accelerated incident electrons revealed that the nano/amorphous hybrid structure consisting of nanosized IrO2 particles highly dispersed in the amorphous Ta2O5 matrix can be prepared at 380 °C. Oxygen evolution was accelerated with an increasing Ir ratio in the anodes prepared at 380 °C in sulfuric acid solutions. Anodic PbO2 deposition on the anodes prepared at 380 °C in lead sulfate solutions, which assumed the conditions of practical use, was completely suppressed.

show abstract

Section: Methodsmentioning

confidence: 99%

“…This deposited PbO 2 not only reduces the catalytic activity of the anode for oxygen evolution but also becomes partially reduced to nonconductive PbSO 4 when electrolysis is stopped 3, 55,56 and the continuous use of the anode leads to problems such as an increase in the cell voltage.…”

mentioning

confidence: 99%

Reaction Selectivity of IrO₂-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Kawaguchi

Morimitsu

2020

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

Distinction of Conductive PbO2 and Non-conductive PbSO4 in Deposited Mixtures on IrO2-Ta2O5/Ti Anodes Using SEM with Low Accelerated Incident Electrons

Kawaguchi

Morimitsu

2015

Journal of The Surface Finishing Society of Japan

Self Cite

View full text Add to dashboard Cite

Formation Mechanism of Non-conductive PbSO<sub>4</sub> on IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Anodes in Copper Foil Production

Cited by 2 publications

References 35 publications

Reaction Selectivity of IrO₂-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Reaction Selectivity of IrO₂-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Distinction of Conductive PbO<sub>2</sub> and Non-conductive PbSO<sub>4</sub> in Deposited Mixtures on IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Anodes Using SEM with Low Accelerated Incident Electrons

Contact Info

Product

Resources

About

Formation Mechanism of Non-conductive PbSO<sub>4</sub> on IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Anodes in Copper Foil Production

Cited by 2 publications

References 35 publications

Reaction Selectivity of IrO2-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Reaction Selectivity of IrO2-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Distinction of Conductive PbO<sub>2</sub> and Non-conductive PbSO<sub>4</sub> in Deposited Mixtures on IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Anodes Using SEM with Low Accelerated Incident Electrons

Contact Info

Product

Resources

About

Reaction Selectivity of IrO₂-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition

Reaction Selectivity of IrO₂-Based Nano/Amorphous Hybrid Oxide-Coated Titanium Anodes in Acidic Aqueous Solutions: Oxygen Evolution and Lead Oxide Deposition