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Kinetics of oxygen reduction at RuO2-coated titanium electrode in alkaline solution

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Abstract

Oxygen reduction at RuO2-coated titanium electrodes prepared by thermal decomposition was investigated by employing cyclic voltammetry and rotating-disc electrode techniques. Cyclic voltammetric results indicated that oxygen reduction was catalysed by at least some hydrous oxyruthenium species, (i.e., Ru(iii)) at low polarization range (E >−0.45V) and by at least some low oxide states of ruthenium species at high polarization (E<−0.45V). On the basis of measurements using a rotating disc electrode together with polarization curves, Tafel slopes and stoichiometric number determinations, two mechanisms for oxygen reduction on an RuO2-coated titanium electrode are proposed.

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  1. Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, 70101

    C. -C. CHANG  & T. -C. WEN

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  1. C. -C. CHANG
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CHANG , C.C., WEN , T.C. Kinetics of oxygen reduction at RuO2-coated titanium electrode in alkaline solution. Journal of Applied Electrochemistry 27, 355–363 (1997). https://doi.org/10.1023/A:1018445100515

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