The Effect of Acid Etching Process on Surface Morphology and Electrocatalytic Capability of RuO₂-IrO₂-TiO₂/Ti Anode

Abstract:

Titanium substrate was etched by oxalic acid and hydrochloric acid respectively. Then the anodes of RuO₂-IrO₂-TiO₂/Ti were prepared by Pechini method. The surface morphology of anodes was studied with SEM, EDX and XRD. The electrocatalytic capability of anodes was studied by polarization curve and cyclic voltammetry curve. The effect of Acid etching process on anode life was studied by accelerated life test. The results show that there was an obvious effect of acid etching on surface morphology of the anodes. The result indicates that the anode with hydrochloric acid etching have the better electrocatalytic capability and accelerated life.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 1663-1667
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.1663
• Online since: June 2012
• Authors: Dong Qu, Jin Hu, Li Shen, Wei Jun Zhang, Wei Wang
• Keywords: Acid Etching, Pechini Method, RuO₂-IrO₂-TiO₂/Ti Anode

References

[1] Trasatti S: Electrocatalysis: Understanding the success of DSA, Electrochimica Acta. Vol. 45(2000), pp.2377-2385.

DOI: 10.1016/s0013-4686(00)00338-8

[2] Z. X. Zhang: Titanium electrode Engineering (Metallurgical Industry Press, Beijing, china, 2003), pp.273-276.

[3] L. Y. Chu, L. K. Xu, L. B. Wu, et al.: Effect of oxalic acid etching on morphology and electrocatalytic activity of oxide anodes, Acta Metallurgica Sinica. Vol. 41(2005), pp.763-768.

[4] Krysa J, Kule L, Mraz R, et al.: Effect of coating thickness and surface treatment of titanium on the properties of IrO2-Ta2O5 anodes, Appl Electrochem. Vol. 26(1996), pp.999-1005.

DOI: 10.1007/bf00242194

[5] Krysa J, Maixner J, Mraz R, et al.: Effect of coating thickness on the properties of IrO2-Ta2O5 anodes, Appl Electrochem. Vol. 28(1998), p.369.

[6] Krysa J, Mraz R: Experimental investigation of the double layer capacity, X-ray diffraction and the relative surfcce content of TiH2 during pretreatment of titanium used for the preparation of dimensionally stable anodes with RuO2 and/or IrO2 coating, Electrochim Acta. Vol. 40(1995), pp.1997-2003.

DOI: 10.1016/0013-4686(94)00234-r

[7] J. M. Hu, H. M. Meng, J. Q. Zhang: Effect of preparation conditions on the properties of Ti based IrO2-Ta2O5 anodes, Acta Metallurgica Sinica. Vol. 38(2002), pp.69-73.

[8] Yoshio Takasu, Satoshi Onoue, Kohichi Kameyama et al.: Preparation of ultrafine RuO2-IrO2-TiO2 oxide particles by solgel process, Electrochimica Acta. Vol. 39 (1994), p.1996.

DOI: 10.1016/0013-4686(94)85079-8

[9] L. P. Dai, J. Peng, L. L. Wang: Preparation and performance of Ru-Ir-Ti/Ti electrode coating by sol-gel process, Rare Metal Materials and Engineering. Vol. 38(2009).

[10] Camara O R, Trasatti S: Surface electrochemical properties of Ti/(RuO2+ZrO2) electrodes, Electrochim. Acta. Vol. 41(1996), p.420.

DOI: 10.1016/0013-4686(95)00315-0

[11] Trasatti S: Physical electrochemistry of ceramic oxide, Electrochimica Acta, Vol. 36(1991), p.225.