Resumo

ORTIZ, Juan; PUELMA, Marta  e  GAUTIER, Juan Luis. INDIRECT OXIDATION OF PHENOL ON GRAPHITE ON NI_0.3 Co_2.7O₄ SPINEL ELECTRODES IN ALKALINE MEDIUM. J. Chil. Chem. Soc. [online]. 2003, vol.48, n.2, pp. 67-71. ISSN 0717-9707.  doi: 10.4067/S0717-97072003000200012.

We studied the oxidation of phenol by HO₂- ions obtained from the oxygen reduction reaction (ORR) on pyrolytic graphite and on Ni₀.₃Co₂.₇ O₄ spinel oxide in 1M KOH at 25C. Phenol degradation was achieved by using the controlled potential electrolysis of saturated O2 solutions under batch and laminar flow conditions. In both electrodes, the electro- generation of HO₂^- occurs between -0.2 V and -0.4V, with the graphite being more efficient than the Ni_O.₃CO₂.₇ O₄ electrode. The phenol degradation conversions for the batch electrolysis were 32% on graphite and 21% on the oxide, whereas with the flow mode they were 7% and 22% respectively

Palavras-chave : Peroxide ion; Oxidation; Phenol; Graphite; Nickel-Cobalt Oxide; Spinel Thin Films.