Untitled

Gattrell, M.; MacDougall, B.; Henuset, Y. M.; Fournier, J.

doi:10.1023/a:1022611904516

Cited by 2 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Introductionmentioning

confidence: 99%

“…The adsorption of ions and molecules on Pt electrodes is much stronger than that on the oxide electrode surface. Oxide electrodes are an important category of electrode materials which are widely used in many electrochemical processes including electrowinning, cathodic protection, 22 and remediation technology for a cleaner environment, [23][24] as well as in the chlor-alkali industry. 25 Significant work has been done in the mechanistic classification of electrochemical oscillators 1,26 and in understanding the origin of electrochemical oscillations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta₂O₅-IrO₂ Electrode

and

Miller

2004

J. Phys. Chem. B

View full text Add to dashboard Cite

The electrooxidation of sulfide on a microstructured oxide electrode Ti/Ta 2 O 5 -IrO 2 was studied using electrochemical methods such as cyclic voltammetry, differential capacity, galvanostatic measurements and electrochemical impedance spectroscopy (EIS). Sulfide and hydrosulfide can be oxidized to sulfur, polysulfides, and sulfate depending upon the electrode potential. Our surface analysis illustrates that the Ti/Ta 2 O 5 -IrO 2 electrode prepared in this study has a "cracked mud" structure with oxide particles sitting on the top of the electrode surface which have a particle size of around 100 nm. For the first time, two distinct galvanostatic potential oscillations, named as Oscillation A and Oscillation B, respectively, are observed during the electrooxidation of sulfide on an oxide electrode. The features of the potential oscillations strongly depend on the applied current densities. Oscillation A, located in the low current region, has larger amplitudes and much smaller frequencies than Oscillation B, which occurs in the high current region. Our EIS studies show that both Oscillation A and Oscillation B can be classified into HNDR (hidden negative differential resistance) oscillators with oxygen evolution involved. Oscillation A is caused by the variation of the S 2-/HSsurface concentration from the diffusion-limited depletion by oxidation and from the convection-induced replenishment by periodic oxygen evolution, while Oscillation B is due to the synergic effect of sulfur formation/removal and constant oxygen evolution.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta₂O₅-IrO₂ Electrode

and

Miller

2004

J. Phys. Chem. B

View full text Add to dashboard Cite

show abstract

“…The discovery of dimensionally stable anodes (DSAs) is one of the greatest technological breakthroughs of electrochemistry over the last 50 years. − DSAs are widely used in electrochemical processes including electrowinning, cathodic protection, , and remediation technology for a cleaner environment, − as well as in the chlorralkali industry. − Typically, DSAs consist of an active mixed-metal oxide (MMO) coating thermally deposited on a substrate, usually a valve metal (Ti, Zr, Ta, or Nb). Titanium is widely used as a substrate because of its good corrosion resistance and reasonable cost.…”

Section: Introductionmentioning

confidence: 99%

Influence of a Nanoscale Gold Thin Layer on Ti/SnO₂-Sb₂O₅ Electrodes

Chen

Nigro

2003

J. Phys. Chem. B

View full text Add to dashboard Cite

A nanoscale gold thin film and its influence on Ti/SnO2-Sb2O5 coating have been investigated by scanning electron microscopy (SEM) and electrochemical methods such as cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and the chronopotentiometric technique in both acidic and caustic solutions. The gold thin film was fabricated by sputtering, and its thickness was estimated using electrochemical methods. The nanoscale gold thin film on the titanium substrate exhibits electrochemical behavior similar to that of a polycrystalline Au electrode. Our study shows that the presence of a nanoscale Au thin film on the Ti substrate can effectively prevent the growth of a TiO2 insulating layer between the substrate and the SnO2-Sb2O5 coating, resulting either from the thermal procedure during the fabrication of the oxide electrodes or from the electrochemical process during the lifetime tests, thus greatly prolonging the service lifetime of the SnO2-Sb2O5 electrodes. The failure mechanisms of the SnO2-Sb2O5 electrodes have also been studied using the EIS and SEM techniques.

show abstract

Untitled

Cited by 2 publications

References 6 publications

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta₂O₅-IrO₂ Electrode

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta₂O₅-IrO₂ Electrode

Influence of a Nanoscale Gold Thin Layer on Ti/SnO₂-Sb₂O₅ Electrodes

Contact Info

Product

Resources

About

Untitled

Cited by 2 publications

References 6 publications

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta2O5-IrO2 Electrode

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta2O5-IrO2 Electrode

Influence of a Nanoscale Gold Thin Layer on Ti/SnO2-Sb2O5 Electrodes

Contact Info

Product

Resources

About

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta₂O₅-IrO₂ Electrode

Potential Oscillations during the Electrocatalytic Oxidation of Sulfide on a Microstructured Ti/Ta₂O₅-IrO₂ Electrode

Influence of a Nanoscale Gold Thin Layer on Ti/SnO₂-Sb₂O₅ Electrodes