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Pure Appl. Chem. Vol. 73, No. 12, pp. 1871-1884 (2001)

Pure and Applied Chemistry

Vol. 73, Issue 12

Green processes for environmental application. Electrochemical ozone production*

L. M. Da Silva1, L. A. De Faria2, and J. F. C. Boodts1,2,**

1Depto. de Química, FFCLRP/USP, Av. Bandeirantes, 3900. 14040-901. Ribeirão Preto - SP, Brazil; 2Instituto de Química, UFU, Campus Santa Mônica, Av. João Naves de Ávila, 2160. 38400-902, Uberlândia - MG, Brazil

Abstract: Several aspects of electrochemical ozone production (EOP) on b-PbO2 were investigated. The morphology of the electrode material was determined in situ using extensive (total, external, and internal differential capacity) and intensive parameters (the morphology factor, j) permitting comparison with results of other laboratories if appropriate electrode characterization parameters are available. The influence of the nature of the supporting electrolyte on the oxygen evolution reaction (OER)/EOP processes was investigated using polarization curves, recorded under quasi-stationary conditions, point-by-point polarization, and chronopotentiometry. The performance of the several b-PbO2/electrolyte system was evaluated using the apparent specific power criterion. A detailed mechanism for EOP is proposed.

* An issue of reviews and research papers based on presentations made at the IUPAC/ICSU Workshop on Electrochemistry and Interfacial Chemistry in Environmental Clean-up and Green Chemical Processes, Coimbra, Portugal, 6-7 April, 2001.
** Corresponding author.

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