Electro-oxidation of phenol over electrodeposited MnOx nanostructures and the role of a TiO2 nanotubes interlayer

Massa, Andrea; Hernández, Simelys; Lamberti, Andrea; Galletti, Camilla; Russo, Nunzio; Fino, Debora

doi:10.1016/j.apcatb.2016.10.025

Cited by 68 publications

(28 citation statements)

References 64 publications

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“…However, nowadays, modification of electrodes with nanocomposites (NCs), conducting polymers and NPs of transition metal oxides or sulfides has become the major field of research in catalyzing the oxidation of various compounds. [17][18][19][20][21][22][23] Among these, some pioneering works have been performed pertaining to electrocatalytic oxidation of phenolic compounds, for example, Masa et al, explored the application of MnO x nanostructures and TiO 2 nanotubes interlayer in catalyzing phenol oxidation. [17] Zhou et al, have studied reduced graphene oxide-based materials for phenol oxidation.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS₂/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

et al. 2019

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FeS2/carbon nanotube (CNT) nanocomposites were synthesized and immobilized on the surface of a glassy carbon electrode (GCE) in order to investigate the electrocatalytic conversion of 4‐aminophenol (4‐AP) into p‐quinone in an aqueous medium. The reformed electronic properties (in terms of lowering of band‐gap energy and charge‐transfer resistance), as well as improved surface area, result in an enhanced redox reaction of 4‐AP in the presence of FeS2‐CNT NCs compared to that with FeS2 alone. The 4‐AP molecules undergo coupled two‐proton and two‐electron transfer quasi‐reversible redox reactions with a symmetry factor of 0.55 and standard rate constant (k°) of 0.8 cm s−1. Here, quinone imine is generated as an intermediate which is later converted into quinone in an irreversible hydrolysis reaction. The best catalytic performance can be obtained at the pH value of 7.0.

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Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS₂/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

et al. 2019

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“…In pH=12.0, we observe that the solutions become a little bit turbid after oxidation. This indicates the formation of polymeric intermediate products by the hydroxyl group of DCB that makes the degradation much more difficult [17,34].…”

Section: Effect Of Experimental Parameters On Dichlorobenzene Mineralmentioning

confidence: 99%

Anodic Oxidation of Chlorinated Pesticides on BDD and PbO2 Electrodes: Kinetics, Influential Factors and Mechanism Determination

Rabaaoui¹,

Kacem²,

Mohamed³

et al. 2017

Mod Chem Appl

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In this work, the removal of two pesticides 1, 2-dichlorobenzene and 1, 4-dichlorobenzene by electrolysis using BDD and Pb/PbO 2 as anodes is studied. Different operating conditions and factors affecting the treatment process including anode material, applied current density, supporting electrolyte and initial pH value were studied and optimized. Results demonstrate, as expected, that the influence of the anode material used on the degradation of pesticides was very significant in all cases. Infact electrolysis with diamond electrodes can attain the complete depletion of the pesticide and its mineralization faster than with PbO 2 anode. Electrolysis experiments strongly improves that the complete degradation of pesticides occurred in the presence of Na 2 SO 4 as conductive electrolyte at current density equals 20 mA cm -2 . Acidic pH would accelerate dichlorobenzene degradation, whereas alkaline condition showed negative effects. The disappearance of the pesticides followed a pseudo-first-order kinetics. Reversed-phase chromatography allows detecting Catechol, 2-chlorophenol and Pyrogallol as primary aromatic intermediates of 1,2-DCB and Hydroquinone, Benzoquinone and 4-chlorophenol for 1,4-DCB. Dechlorination of these products gives chloride ions Cl -. Ion-exclusion chromatography reveals the presence of maleic, formic, fumaric, malonic, glyoxylic, acetic and oxalic acid. An oxidation mechanism is proposed in agreement with other works shown in the literature.

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“…Devaraj and Munichandraiah investigated the specific electrochemical capacitance of three MnO 2 phases, which followed an order of α‐MnO 2 > γ‐MnO 2 > β‐MnO 2 , suggesting their different electrocatalytic activities. Massa et al reported the electrochemical oxidation of phenol over two electrodeposited MnO x phases (α‐MnO 2 and α‐Mn 2 O 3 ), which exhibited distinctive activity and stability. To be specific, the cathodically electrodeposited α‐MnO 2 was proved to be the more active phase and degraded phenol by 26.8%, while the anodically electrodeposited α‐Mn 2 O 3 showed better stability than α‐MnO 2 , with a final working potential of 2.9 V (vs RHE).…”

Section: Spe For Environmental Treatmentmentioning

confidence: 99%

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Uddin

Zhang

et al. 2020

Advanced Materials

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The structure–property engineering of phase‐based materials for redox‐reactive energy conversion and environmental decontamination nanosystems, which are crucial for achieving feasible and sustainable energy and environment treatment technology, is discussed. An exhaustive overview of redox reaction processes, including electrocatalysis, photocatalysis, and photoelectrocatalysis, is given. Through examples of applications of these redox reactions, how structural phase engineering (SPE) strategies can influence the catalytic activity, selectivity, and stability is constructively reviewed and discussed. As observed, to date, much progress has been made in SPE to improve catalytic redox reactions. However, a number of highly intriguing, unresolved issues remain to be discussed, including solar photon‐to‐exciton conversion efficiency, exciton dissociation into active reductive/oxidative electrons/holes, dual‐ and multiphase junctions, selective adsorption/desorption, performance stability, sustainability, etc. To conclude, key challenges and prospects with SPE‐assisted redox reaction systems are highlighted, where further development for the advanced engineering of phase‐based materials will accelerate the sustainable (active, reliable, and scalable) production of valuable chemicals and energy, as well as facilitate environmental treatment.

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Electro-oxidation of phenol over electrodeposited MnOx nanostructures and the role of a TiO2 nanotubes interlayer

Cited by 68 publications

References 64 publications

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS₂/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS₂/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

Anodic Oxidation of Chlorinated Pesticides on BDD and PbO2 Electrodes: Kinetics, Influential Factors and Mechanism Determination

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

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Electro-oxidation of phenol over electrodeposited MnOx nanostructures and the role of a TiO2 nanotubes interlayer

Cited by 68 publications

References 64 publications

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS2/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS2/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

Anodic Oxidation of Chlorinated Pesticides on BDD and PbO2 Electrodes: Kinetics, Influential Factors and Mechanism Determination

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Contact Info

Product

Resources

About

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS₂/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium

Electrocatalytic Oxidation of 4‐Aminophenol Molecules at the Surface of an FeS₂/Carbon Nanotube Modified Glassy Carbon Electrode in Aqueous Medium