Effect of electrolysis temperature on surface morphology and stability of Ti/RuO2–IrO2–SnO2anode

The effect of electrolysis temperature on the surface morphology and stability of a Ti/RuO2–IrO2–SnO2 anode was studied using scanning electron microscopy, energy dispersed X-ray spectroscopy and an accelerated service life test. It has been shown that when the electrolysis temperature is 5 and 10°C, almost no active coating exists in the edge of the deactivated anode, but a few active components remain in the centre area, and the cell voltage is very high in the initial stages of electrolysis, resulting in worse stability. With the increasing electrolysis temperature, the anode coatings wear down uniformly, and the stability is improved when comparing to the results obtained with a low electrolysis temperature (5 and 10°C).