Considerações sobre a eletrogeração de peróxido de hidrogênio

Considerations on the hydrogen peroxide electrogeneration

dc.creatorRagnini, Christiane A. R.
dc.creatorDi Iglia, Rosana A.
dc.creatorBertazzoli, Rodnei
dc.date2001-04-01
dc.date2014-07-17T14:50:31Z
dc.date2015-11-26T11:45:46Z
dc.date2014-07-17T14:50:31Z
dc.date2015-11-26T11:45:46Z
dc.date.accessioned2018-03-28T20:49:30Z
dc.date.available2018-03-28T20:49:30Z
dc.identifierQuímica Nova. Sociedade Brasileira de Química, v. 24, n. 2, p. 252-256, 2001.
dc.identifier0100-4042
dc.identifierS0100-40422001000200017
dc.identifier10.1590/S0100-40422001000200017
dc.identifierhttp://dx.doi.org/10.1590/S0100-40422001000200017
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000200017
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/23460
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/23460
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1235943
dc.descriptionThis paper presents some results that may be used as previous considerations to a hydrogen peroxide electrogeneration process design. A kinetic study of oxygen dissolution in aqueous solution is carried out and rate constants for oxygen dissolution are calculated. Voltammetric experiments on vitreous carbon cathode shown that the low saturation concentration drives the oxygen reduction process to a mass transfer controlled process which exhibits low values of limiting currents. Results have shown that the hydrogen peroxide formation and its decomposition to water are separated by 400 mV on the vitreous carbon surface. Diffusion coefficients for oxygen and hydrogen peroxide are calculated using data taken from Levich and Tafel plots. In a series of bulk electrolysis experiments hydrogen peroxide was electrogenerated at several potential values, and concentration profiles as a function of the electrical charged passed were obtained. Data shown that, since limiting current plateaus are poorly defined onto reticulated vitreous carbon, cathodic efficiency may be a good criterion for choosing the potential value in which hydrogen peroxide electrogeneration should be carried out.
dc.description252
dc.description256
dc.languagept
dc.publisherSociedade Brasileira de Química
dc.relationQuímica Nova
dc.rightsaberto
dc.sourceSciELO
dc.subjecthydrogen peroxide
dc.subjectelectrosynthesis of hydrogen peroxide
dc.subjectoxygen reduction
dc.subjectvitreous carbon
dc.subjectkinetics of oxygen dissolution
dc.titleConsiderações sobre a eletrogeração de peróxido de hidrogênio
dc.titleConsiderations on the hydrogen peroxide electrogeneration
dc.typeArtículos de revistas


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