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The effect of addition of chromate on the hydrogen evolution reaction and on iron oxidation in hydroxide and chlorate solutions
KTH, Tidigare Institutioner, Kemiteknik.ORCID-id: 0000-0001-5816-2924
KTH, Tidigare Institutioner, Kemiteknik.ORCID-id: 0000-0001-9203-9313
KTH, Tidigare Institutioner, Kemiteknik.
1992 (engelsk)Inngår i: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 37, nr 10, s. 1873-1881Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The addition of chromate to the electrolyte has been shown in previous papers to hinder almost completely the electroreduction of hypochlorite, while the hydrogen evolution reaction can still proceed on the cathode surface. The effect of chromate on the latter reaction has been studied with cyclic voltammetry and by measuring polarization curves for iron electrodes in both chlorate and hydroxide electrolyte. For the sake of comparison, the investigations have also included the effects on the gold electrode in hydroxide solution. The results showed that the kinetics is changed in a way that decreases the differences in electrocatalytic activity between different electrode materials. Also, the innermost layer of the chromium hydroxide film seems to be the most active part in the HER. The chromate also affects the oxidation of the iron surface. A practical result of this is that the activity for the HER on corroded iron in chlorate electrolyte depends on whether the electrolyte contained chromate during the period of corrosion. The activation becomes much smaller if chromate is present.

sted, utgiver, år, opplag, sider
1992. Vol. 37, nr 10, s. 1873-1881
Emneord [en]
chlorate manufacture, chromate, chromium hydroxide, hydrogen evolution reaction, iron oxidation
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-13052DOI: 10.1016/0013-4686(92)85093-ZScopus ID: 2-s2.0-0001435843OAI: oai:DiVA.org:kth-13052DiVA, id: diva2:320382
Merknad

QC 20100525

Tilgjengelig fra: 2010-05-25 Laget: 2010-05-25 Sist oppdatert: 2020-03-10bibliografisk kontrollert
Inngår i avhandling
1. Electrode reactions in the chlorate process
Åpne denne publikasjonen i ny fane eller vindu >>Electrode reactions in the chlorate process
2002 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 2002. s. 47
Serie
Trita-KET, ISSN 1104-3466 ; 163
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-3442 (URN)
Disputas
2002-12-06, 00:00 (engelsk)
Merknad
QC 20100525Tilgjengelig fra: 2002-12-03 Laget: 2002-12-03 Sist oppdatert: 2010-05-25bibliografisk kontrollert
2. Activated Cathodes for the Hydrogen Evolution Reaction in Chlorate Manufacture
Åpne denne publikasjonen i ny fane eller vindu >>Activated Cathodes for the Hydrogen Evolution Reaction in Chlorate Manufacture
1993 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 1993. s. 33
Serie
TRITA-TEK, ISSN 0281-4110 ; 1993:01
Emneord
chlorate, cathode, ruthenium dioxide, chromate
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-107586 (URN)
Veileder
Merknad

QC 20130208

Tilgjengelig fra: 2013-02-08 Laget: 2012-12-13 Sist oppdatert: 2013-02-08bibliografisk kontrollert

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Cornell, AnnLindbergh, Göran

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