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Anodic oxidation of phenol on Ti/IrO2 electrode: Experimental studies

Efthalia Chatzisymeon, Stéphane Fierro, Karafyllis Iason, Mantzavinos Dionysis, Kalogerakis Nikos, Katsaounis Alexandros

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/AD24DFB8-32FB-47C1-8803-29984A89A154-
Αναγνωριστικόhttps://doi.org/10.1016/j.cattod.2010.02.076-
Γλώσσαen-
Μέγεθος4en
ΤίτλοςAnodic oxidation of phenol on Ti/IrO2 electrode: Experimental studiesen
ΔημιουργόςEfthalia Chatzisymeonen
ΔημιουργόςStéphane Fierroen
ΔημιουργόςKarafyllis Iasonen
ΔημιουργόςΚαραφυλλης Ιασωνel
ΔημιουργόςMantzavinos Dionysisen
ΔημιουργόςΜαντζαβινος Διονυσηςel
ΔημιουργόςKalogerakis Nikosen
ΔημιουργόςΚαλογερακης Νικοςel
ΔημιουργόςKatsaounis Alexandrosen
ΔημιουργόςΚατσαουνης Αλεξανδροςel
ΕκδότηςElsevieren
ΠεριγραφήΔημοσίευση σε επιστημονικό περιοδικό el
ΠερίληψηThe electrochemical oxidation of acidic solutions of phenol on a Ti/IrO2 anode has been investigated by cyclic voltammetry and bulk electrolysis in a single-compartment cell. In the potential region of oxygen evolution, anodic oxidation resulted in electrode passivation (as evidenced by voltammetric measurements) allegedly due to the formation of a polymeric film on its surface. Phenol degradation increased with increasing temperature in the range investigated 30–80 °C and it was affected by the addition of Cl− and Br− anions in the supporting electrolyte. Complete conversion of 10 mM phenol was achieved after 37 Ah L−1 of charge passed at 80 °C under galvanostatic conditions (50 mA cm−2) in absence of Cl−. In contrast only 10 Ah L−1 were needed in the presence of 35 mM Cl−. The presence of chloride can induce reactions involving chlorohydroxyl radicals and electrogenerated oxidants such as free chlorine. On the other hand, addition of Br− slightly inhibited degradation possibly due to bromide scavenging of electrogenerated active species. Phenol degradation proceeded through the formation of three dominant, aromatic intermediates, namely 1,4-benzoquinone, hydroquinone and pyrocatechol, while total oxidation to CO2 was not significant unless harsh conditions (i.e. high temperatures and charges) were employed.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-10-14-
Ημερομηνία Δημοσίευσης2010-
Θεματική ΚατηγορίαDSA® electrodesen
Θεματική ΚατηγορίαElectrochemical oxidationen
Θεματική ΚατηγορίαTi/IrO2en
Θεματική ΚατηγορίαPhenolen
Θεματική ΚατηγορίαOrganic transformationen
Θεματική ΚατηγορίαWastewater treatmenten
Βιβλιογραφική ΑναφοράE.Chatzisymeon ,S. Fierro ,I. Karafyllis , D.Mantzavinos ,N. Kalogerakis, and A.Katsaounis, "Anodic oxidation of phenol on Ti/IrO2 electrode: Experimental studies," Catalysis Today, vol. 151, no. 1-2, pp. 185–189, Prl. 2010. doi: 10.1016/j.cattod.2010.02.076en

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