A study of the deactivation and service life of Ir oxide anodes supported on Al substrates

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TypeArticle
Journal titleJournal of Applied Electrochemistry
Volume30
Issue5
Pages523532; # of pages: 9
SubjectAl substrate; anode; deactivation; iridium oxide; service life
AbstractThe deactivation of Ir oxides supported on Al substrates has been studied in 0:5 M H2SO4. Their electrochemical behaviour and service life was also compared to IrO2 electrodes, similarly prepared, supported on Ti. The Ir oxides were prepared by thermal decomposition of an Ir salt precursor solution. The service life and other oxide properties were found to be in¯uenced by different factors used for preparation of the Ir oxide electrodes, for example, the temperature used for the decomposition process and the solution used to etch the Al substrate. In contrast to the IrO2 anodes supported on Ti, the service lives of the IrO2 anodes supported on Al were found to be very short. The deactivation of the latter anodes appears to be related to poor adhesion between the Ir oxide and the Al substrate. However, it was found that the service life of IrO2 anodes supported on Al is increased when a layer consisting of iridium is electrochemically deposited onto the Al substrate prior to the thermal formation of the IrO2.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52177
NPARC number16187146
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Record identifier85a6a757-5ef3-4862-9651-3b494bacde61
Record created2010-10-20
Record modified2016-05-09
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