The influence of metal oxide properties on the oxidation of organics

Bock, Christina; MacDougall, B.

doi:10.1016/s0022-0728(00)00232-1

Cited by 27 publications

(15 citation statements)

References 13 publications

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“…The reaction scheme would be 27 Benzoquinone formed in the initial oxidation steps can be reduced in the cathode to hydroquinone, decreasing the current efficiency for TOC removal.…”

Section: B423mentioning

confidence: 99%

“…For that reason, the ICF concept fits better with compactness of the outer electrode surface. Table II shows the values of current efficiency ͑I eff ͒ for the elimination of phenol calculated as in the paper by Bock and MacDougall, 27 assuming that only one electron is involved in the anodic oxidation of phenol, at the end of the electrolysis run ͑around 12 Ah L −1 ͒, calculated by means of…”

Section: B424mentioning

confidence: 99%

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Evaluation of the Electrocatalytic Activity of Antimony-Doped Tin Dioxide Anodes toward the Oxidation of Phenol in Aqueous Solutions

Montilla

Morallón

Vázquez

2005

J. Electrochem. Soc.

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Antimony-doped tin dioxide electrodes supported on titanium have been used in the electrochemical treatment of aqueous solution containing phenol. Ti/SnO 2 -Sb anode has high efficiency in the elimination of phenol, but its use is hindered by its short service life. The introduction of platinum in the oxide layer ͑3 or 13 atom %͒ increases the electrode service life up to two orders of magnitude. The electrocatalytic activity of the electrodes toward phenol oxidation has been analyzed with respect to the amount of platinum in the electrode composition. Voltammetric studies show that the oxidation potential of phenol decreases with the amount of platinum in the oxide layer. The activity for phenol oxidation per electroactive site is higher with the Sb-doped SnO 2 electrode within the zone of electrochemical stability of the solvent. Galvanostatic electrolysis of phenol solutions was performed analyzing several factors that affect the efficiency of the elimination process, such as anode composition, cell design, current density, and phenol concentration. The electrode containing platinum ͑3 atom %͒ presents the highest efficiency for phenol removal, even higher than Sb-doped SnO 2 .

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“…The reaction scheme would be 27 Benzoquinone formed in the initial oxidation steps can be reduced in the cathode to hydroquinone, decreasing the current efficiency for TOC removal.…”

Section: B423mentioning

confidence: 99%

Section: B424mentioning

confidence: 99%

Evaluation of the Electrocatalytic Activity of Antimony-Doped Tin Dioxide Anodes toward the Oxidation of Phenol in Aqueous Solutions

Montilla

Morallón

Vázquez

2005

J. Electrochem. Soc.

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“…They pointed out that regular oxygen gas evolution at gold in base occurs only above 1.0 V. The presence of gold in the platinum-rich areas will therefore be not as effective in inhibiting the oxygen evolution reaction in base as it is in acid. This might be detrimental to the use of these alloys for waste-water treatment, since oxygen gas evolution lowers the current efficiency during the electro-oxidation of organic compounds [16].…”

Section: Au-40pt Alloymentioning

confidence: 99%

The electrochemistry of gold–platinum alloys

Möller

Pistorius

2004

Journal of Electroanalytical Chemistry

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“…The best results obtained in this area were achieved using inert electrodes such as SnO 2 -Sb, PbO 2 , and boron doped diamond (BDD). These electrodes are able to generate weakly adsorbed hydroxyl radicals (Simond et al, 1997) that guarantee good oxidation rates (Bock and MacDougall, 2000). Despite the good results, SnO 2 -Sb has problems with deactivation and short service life (Montilla et al, 2004) and PbO 2 could contaminate the wastewater with lead.…”

Section: Introductionmentioning

confidence: 99%

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Britto-Costa

Ruotolo

2012

Braz. J. Chem. Eng.

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-Industrial wastewater containing non-biodegradable organic pollutants consists of highly toxic effluents whose treatment is necessary due to environmental and economical restrictions. In order to treat these effluents, an electrochemical process using a dimensionally stable anode (DSA ® ) and boron-doped diamond (BDD) electrode was studied. The performance of these electrodes for COD removal from aqueous phenol solution was evaluated in the absence and presence of different chloride concentrations. The results showed that DSA ® could be successfully used to remove COD when high chloride concentration (3035 mg L -1 Cl -) and mild current density are employed (50 mA cm -2 ). On the other hand, the presence of chloride did not have the same significant effect on the COD depletion rate using BDD; however, under mild conditions (50 mA cm -2 , 0.190 m s -1 ), the addition of 607 mg L -1 Cl -improved the COD removal by approximately 52% after 8 hours of electrolysis. The effect of current density (i) and flow velocity (v) were also studied, and it was verified that they have an important role on the process performance, especially when DSA ® is used.

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The influence of metal oxide properties on the oxidation of organics

Cited by 27 publications

References 13 publications

Evaluation of the Electrocatalytic Activity of Antimony-Doped Tin Dioxide Anodes toward the Oxidation of Phenol in Aqueous Solutions

Evaluation of the Electrocatalytic Activity of Antimony-Doped Tin Dioxide Anodes toward the Oxidation of Phenol in Aqueous Solutions

The electrochemistry of gold–platinum alloys

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

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