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Ti-supported electrodes of nominal composition Ti/Ir 0.3 Ti (0.7-x) Ce x O 2 (0≤x≤0.7) were prepared by thermal decomposition of the chloride precursor mixtures (450 °C). A systematic study of the corrosion behaviour of these anodes was performed under conditions of accelerated corrosion (j=800 mA cm -2 ) in acidic medium. The service life, SL, strongly depended on electrode composition, varying between 6 and 47 h, CeO 2 introduction producing more unstable materials. Anodes containing 30 ≤ mol% CeO 2 ≤ 60 present the lowest SL. This finding is possibly related to the preferential dissolution of Ce in association with the crystalline structure of these coatings (amorphous phase or low degree of crystallinity). The highest SL was observed for the Ti/Ir 0.3 Ti 0.7 O 2 composition, probably as a result of the formation of a solid solution between Ir and Ti, besides a more compact oxide layer, which delays the Ti support passivation. A mixed mechanism of anode deactivation is operative. Complementar analyses, such as ICPES, EDX, SEM and CV, allowed to verify that passivation is the main source of the Ti/Ir 0.3 Ti 0.7 O 2 deactivation, while coating consumption is the main actor responsible for deactivation of high CeO 2 containing anodes
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Alves et al. (1998) studied this question.