Electrooxidation of some phenolic compounds at Bi-doped PbO2

被引：83
作者：
Shmychkova, O. [1 ]
Luk'yanenko, T. [1 ]
Yakubenko, A. [2 ]
Amadelli, R. [3 ]
Velichenko, A. [1 ]
机构：
[1] Ukrainian State Univ Chem Technol, UA-49005 Dnepropetrovsk, Ukraine
[2] State Enterprise Dnieprostandartmetrol, UA-49044 Dnepropetrovsk, Ukraine
[3] Univ Ferrara, ISOF CNR, Dipartimento Chim, I-44121 Ferrara, Italy
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2015年 / 162卷
关键词：
Lead dioxide; Methanesulfonate electrolyte; Phenolic compounds oxidation; Hydroxyl radicals; PHYSICOCHEMICAL PROPERTIES; LEAD DIOXIDE; ELECTROCHEMICAL OXIDATION; P-NITROPHENOL; ELECTROCATALYTIC OXIDATION; DIRECT ELECTROLYSIS; HYDROXYL RADICALS; ANODES; ELECTRODEPOSITION; DEGRADATION;
D O I：
10.1016/j.apcatb.2014.07.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
It has been determined that bismuth content in the oxide grows from 0.49 to 1.81 wt% while increasing the Bi3+ ions additive concentration in the solution from 1 to 10mM. It has been found that ionic additives affect the degree of hydroxylation of lead dioxide surface layer and the bond strength of the oxygen-containing particles. High surface hydration was observed for PbO2 doped with Bi3+. It was determined that the heterogeneous rate constant of oxidation of p-nitroaniline on modified lead dioxide (k(v) = 2.76 x 10(-2) min(-1)) is half as much as on nonmodified (k(v) = 1.68 x 10(-2) min(-1)). It has been revealed that the oxidation rate of p-nitrophenol and p-nitroaniline is proportional to the amount of hydroxyl radicals produced during the water oxidation, which is proposed to be used as a correlation parameter for predicting the electrocatalytic properties of materials based on lead dioxide in respect to the oxidation of organic compounds. (C) 2014 Elsevier B.V. All rights reserved.
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页码：346 / 351
页数：6
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