Corresponding Author

Zhi-guo YE(yezhiguo2008@163.com)


The IrO2-MnO2 anodic nano-coatings were prepared by the traditional thermal decomposition method on the different surfaces of Ti substrates pretreated by different etchants (HCl, H2SO4, C2H2O4 and HF). Surface morphologies and electrochemical performance of the Ti based IrO2-MnO2 anodic coatings were investigated by field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV) and polarization techniques. Analysis showed that the denser IrO2 nano-particles with longer dimensions were obtained at the IrO2-MnO2 anodic coating surfaces on the Ti substrates etched by HF and H2SO4 as compared with those on the Ti substrates etched by HCl and C2H2O4. The decreasing order of electro-catalytic activities for the IrO2-MnO2 anodic nano-coatings on the Ti substrates etched by different etchants is H2SO4 > HF > C2H2O4 > HCl.

Graphical Abstract


etchants, IrO2-MnO2 coating anode, thermal decomposition, cyclic voltammetric charge, current density

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