38 7 Vol.38, No RARE METAL MATERIALS AND ENGINEERING July 2009

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1 38 7 Vol.38, No RARE METAL MATERIALS AND ENGINEERING July 009 ( 35000) - Ti70%-Ru30%(,) Ir70%-Ta30% Ti70%-Ru30% XRD (Ti,Ru)O IrO TG7.5TG5.5 A 00-85X(009) H.Beer RuO [] () [~] Ru:Ti=3:7() [5] Ru [6] IrO [7~9] Ir:Ta=7:3() [3] RuO Ru-Ti IrO Ir-Ta - mm TA 0 mm50 mm ( Ru37%, )( g/ml)( Ir 3.9%) TaCl 5 (00 g/l)(c 6 H 8 O 7 ) :3 3:7 7:3 3 g/m 6 g/m Ru-Ti 60 3 h /s h Ru-Ti Ir-Ta 60 3 h /s TaCl 5 h Ir-Ta Ru-Ti Ir-Ta Ru-Ti (50700)(005HZ0l), 97, cyy-97@tom.com

2 min 500 h Ru-Ti-Ir-Ta Ru-Ti-Ir-Ta 60 3 h /s TaCl 5 h Ru-Ti-Ir-Ta Table Design of the titanium anodes Sample Ti anode Quantity and ratio(mole) Structure of the ing Sandwich Ru-Ti Ir-Ta Ru-Ti Ru:Ti=3:7 Ir:Ta=7:3 Ru:Ti=3:7 Substrate Ru-Ti Ir-Ta Ru-Ti Mixed Ru-Ti-Ir-Ta mixed Ru:Ti:Ir:Ta =3:7:7:3 Substrate Ru-Ti-Ir-Ta tetrad XB-5A X Cu (Kα)Fe 35 kv 0 ma /min 0.0 Metrohm AutoLab KCl cm 5 cm 0.7 cm 0.7 cm NaCl 0.5 mol/l H SO 50.5 / 000 A/m 0 min 0 s / 0 mv/min 0.5~. V (vs SCE) 0.8~.8 V (vs SCE) 0 mv/s 0.~. V(vs SCE)6 cm mol/l H SO 0 A/cm 05 7 V X TiO -RuO IrO TiO RuO [0] Ti X TiO -RuO - IrO TiO Ru TiO Ru TiO Ru [] Intensity/a.u. 5 3 TiO -rutile IrO 3 RuO Ti 5 TiO -anatase 6 Ru θ/(º) XRD Fig. XRD patterns of the anodes

3 6 38 Ti Ta O [] mol/l Tafel η = a + b lgi b [3] a NaCl Tafel Tafel Tafel b Tafel a Tafel.. [3] 3 3a I-E [] RuO RuO RuO IrO 3b ϕ(vs.sce)/v ϕ(vs.sce)/v b 0 3 log (i/a m - ) a I/A I/A a b E/V 3 Fig. Anodic polarization curves in the electrolyte: (a) saturated Fig.3 Cyclic voltammograms of the anode: (a) saturated NaCl and (b) 0.5 mol/l H SO NaCl and (b) 0.5 mol/l H SO

4 mol/l 5 TiO Ru RuO IrO [5,6] Ru-TiIr-Ta RuO IrO.6 O evolution. O evolution Voltage/V Life/min 5 Fig.5 Curves of the potential with the time ) Ru-Ti Ir-Ta ) References [] Gallizioli D, Tantardini F, Trasatti S. J Appl Electrochem[J], 975, 5: 03 [] Panic V V, Dekanski A, Milonjic S K et al. Colloids and Surfaces A:Physicochemical and Engineering Aspects[J], 999, 57: 69 [3] Chen Kangning( ). Metal Anodes( )[M]. Shanghai: East China Normal University Press, 989 [] Tang Dian( ), Wen Shixue(), Chen Shiren() et al. Chlorine and Soda Industries()[J], 998(): Potential/V. Cl evolution Cl evolution [5] Trastti S. Electrochimica Acta[J], 000, 5: 377 [6] Chiaki Iwakara. J Electrochem Soc[J], 985, 3: 9 [7] Zhang Zhaoxian(). Titanium Electrode Industry( 0.8 )[M]. Beijing: Metallurgy Industry Press, 000 [8] Hu J M, Meng H M, Zhang J Q et al. Corrosion Science[J], Time/s 00, : 655 [9] Kristof János et al. Themrochemical Acta[J], 00, 3: 93 [0] Wang Xin( ), Tang Dian( ), Zhou Jingen(). Rare Metal Materials and Engineering( Fig. Potential curves of evolution O and Cl ) [J], 00: 33(): 3

5 8 38 [] Shao Yanqun(), Tang Dian( ). Transactions of Materials and Heat Treatment()[J], 006: 7(): [] Vercesi G P, Rolewicz J et al. Thermochimica Acta[J], 99, 76: 3 [3] Zhang Qiong( ), Yu Yunlong() et al. Journal of Fuzhou University()[J], 00, 3(3): 37 [] Camara O R, Trasatti S. Electroche Acta[J], 996, (3): 0 [5] Henri Bernard Beer. J Electrochem Soc[J], 980, 7(8): 303 [6] Fernández J L, Gennero de Chialvo M R, Chialvo A C. Electroche Acta[J], 00, 7: 9 Studying on the Titanium Anodes Coating with Chlorine Evolution and Oxygen Evolution Syncretism Chen Yongyi, Tang Dian (Fuzhou University, Fuzhou 35000, China) Abstract: The titanium anode with sandwich ing structure was prepared by a sol-gel method. The anode was composed of three layers by firstly the oxide based layer ed with Ti70%-Ru30% on the titanium substrate, and then the inter-layer ed with Ir70%-Ta30%, the surface layer ed with Ti70%-Ru30%. The physical and electrochemical properties of the titanium anode with sandwich structure were studied by XRD, electrode potential, polarization curve, cyclic voltammetry and accelerated life tests. The results showed that the anode ing is composed mainly of rutile phases (Ti, Ru)O, IrO and amorphous Ta O 5. The titanium anode has excellent electro-catalysis activities for both chlorine evolution and oxygen evolution. In the electrochemical conditions for chlorine evolution, the anode can keep better potential stabilities, and also shows a strong anticorrosive property for electrolyzing at high current density and in the high acidity. As the result, the titanium anode act as a good anode for both chlorine evolution and oxygen evolution. Key words: sandwich structuretitanium anodesactivityaccelerated life Biography: Chen Yongyi, Candidate for Ph. D., Institute for Materials Research, Fuzhou University, Fuzhou 35000, P. R. China, Tel: , cyy-97@tom,com

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