Effects of Zr content on electrochemical performance of Ti/Sn−Ru−Co−ZrO _x electrodes

Abstract

The low cell voltage during electrolytic Mn from the MnCl₂ system can effectively reduce the power consumption. In this work, the Ti/Sn−Ru−Co−Zr modified anodes were obtained by using thermal decomposition oxidation. The physical parameters of coatings were observed by SEM (scanning electron microscope). Based on the electrochemical performance and SEM/XRD (X-ray diffraction) of the coatings, the influence of Zr on electrode performance was studied and analyzed. When the mole ratio of Sn−Ru−Co−Zr is 6:1:0.8:0.3, the cracks on the surface of coatings were the smallest, and the compactness was the best due to the excellent filling effect of ZrO₂ nanoparticles. Moreover, the electrode prepared under this condition had the lowest mass transfer resistance and high chloride evolution activity in the 1mol% NH₄Cl and 1.5mol% HCl system. The service life of 3102 h was achieved according to the empirical formula of accelerated-life-test of the new type anode.

Keywords

Ti/Sn−Ru−Co−Zr anode / electrochemical / Mn electrowinning / manganese chloride system / service life

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