Electrooxidation of some phenolic compounds at Bi-doped PbO 2

Shmychkova, O.; Luk’yanenko, T. V.; Yakubenko, A.; Амаделли, Р.; Величенко, А. Б.

doi:10.1016/j.apcatb.2014.07.011

Cited by 82 publications

(36 citation statements)

References 31 publications

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“…As the initial BPA concentration increases, it transfers more BPA to the surface of the electrode so that it could prevent contact between the BPA and the active species, which result in a decrease in reaction rate. 12,19,23 2.4.4. Effect of Electrode Distance.…”

Section: Acs Omegamentioning

confidence: 99%

Dimensional Stable Lead Electrode Modified by SDS for Efficient Degradation of Bisphenol A

et al. 2020

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The dimensional stable lead electrodes modified by sodium dodecyl sulfate (SDS) were prepared with electrochemical deposition and it shows that a more compact, uniform, and smooth film of Ti/PbO 2 (F+SDS) electrode reduces the corroded crystal faces and surface defects. Characterization results demonstrate that the oxygen evolution potential (OEP) of the Ti/PbO 2 (F+SDS) electrode was higher, and its service life is almost 1.6 times longer than the Ti/PbO 2 (F) electrode. Compared with Ti/PbO 2 (F) electrode, the soluble Pb concentration of the Ti/PbO 2 (F+SDS) electrode decreased 15.1%, which indicates that the decrease of crystal surface defects leads to the reduction of Pb ions so that the excellent corrosion resistance electrodes cause low environmental risks. The modified electrodes were used as anodes to degrading bisphenol A (BPA) when an electrolyte is 0.2 M Na 2 SO 4 , the applied voltage is 5 V and electrodes distance is 3 cm, 20 mg/L BPA for electrolysis time of 180 min can reach up to 97.6%.

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Section: Acs Omegamentioning

confidence: 99%

Dimensional Stable Lead Electrode Modified by SDS for Efficient Degradation of Bisphenol A

et al. 2020

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“…We have underlined earlier that PbO 2 doping with anions [23] or cations [24][25][26][27] leads to changes in terms of electrode stability and activity. We show, in particular, that the use of Fe(III)-and Co(II)-doped PbO 2 electrodeposited on porous titanium substrates (PbO 2 /por (Pt-Ti)) leads to comparatively high current efficiency values for ozone formation.…”

Section: Introductionmentioning

confidence: 96%

Electrode characteristics for ozone production: a case study using undoped and doped PbO2 on porous platinised titanium substrates

Rosestolato

Амаделли

Величенко

2015

J Solid State Electrochem

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The primary aim of this paper is the study of the stability and electrochemical activity of PbO 2 electrodeposited onto porous, platinised Ti substrates. The evolution of O 2 from H 2 O oxidation, on as-prepared electrodes, results in the opening of large pores that effectively work as gas channels for removing O 2 generated inside the porous structure, thus favouring the reaction penetration deeper into the pores. A serious problem that limits the utilisation of the internal pore surface is the instability of PbO 2 towards corrosion at high positive potentials or currents. Occlusion of pores by corrosion products is clearly demonstrated by SEM analysis of electrodes after operation as O 2 evolving anodes. Doping PbO 2 with Fe 3+ and Co 2+ yields anodes that resist corrosion up to relatively high anodic potentials/currents; this extends the anode lifetime by decreasing amorphisation of the electrocatalyst and its partial detachment caused by a high pressure of O 2 formed inside the pores during water electrolysis. This is an important result since stability of electrodes is as important as their electrochemical activity for practical applications.In the domain of high positive potentials, PbO 2 doping by Fe 3+ and Co 2+ results in a significant increase of the current efficiency of ozone generation. The magnitude of the observed increase depends on the individual characteristics of the doping cation and of the electrolyte employed. Possible involvement of higher oxidation states of cobalt and iron in the reaction mechanism is discussed on the basis of published literature.

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“…Considering this, we proposed the methanesulfonate electrolytes in which PbO 2 composite coatings are up to 2 mm thick to be used, with satisfactory mechanical properties that can be prepared. 11 Herein, we report further important details on the effect of the deposition conditions on the composition, the physicochemical properties and the electrocatalytic activity of Ni modified PbO 2 -based materials, obtained from methanesul-…”

Section: Introductionmentioning

confidence: 99%

Modified lead dioxide for organic wastewater treatment: Physicochemical properties and electrocatalytic activity

Shmychkova

Luk’yanenko

Dmirtikova

et al. 2019

JSCS

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An investigation on lead dioxide electrodeposition from methanesulfonate electrolytes additionally containing Ni 2+ is reported. It is shown that the lead dioxide electrodes micromodified by nickel have different physicochemical properties vs. nonmodified PbO 2-anodes, that are formed during the deposition. The electrocatalytical reactivity of the electrodes involved in comparison to both the oxygen evolution, as well as to the electrooxidation of 2,4-dichlorophenoxyacetic (2,4-D) acid is investigated. The processes of electrochemical oxidation of 2,4-D on various materials occur qualitatively with the same mechanism and differ only in the reaction rate. It is shown that the Ni-PbO 2-anode possesses the highest electrocatalytic activity: the destruction rate of 2,4-D on it increases 1.5 times in comparison with the unmodified lead dioxide. The chemical oxygen demand (COD) of a 0.4 mM solution of 2,4-D, determined by the dichromate method, is 90.0 mg dm-3 which is 94 % of the theoretical value.

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Electrooxidation of some phenolic compounds at Bi-doped PbO 2

Cited by 82 publications

References 31 publications

Dimensional Stable Lead Electrode Modified by SDS for Efficient Degradation of Bisphenol A

Dimensional Stable Lead Electrode Modified by SDS for Efficient Degradation of Bisphenol A

Electrode characteristics for ozone production: a case study using undoped and doped PbO2 on porous platinised titanium substrates

Modified lead dioxide for organic wastewater treatment: Physicochemical properties and electrocatalytic activity

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