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Citation: HU Ji-Ming, HOU Yan-Yuan, WANG Xiao-Mei, ZHANG Jian-Qing, CAO Chun-Nan. Effect of Calcination Procedure on the Electrocatalytic Activities of Ti/IrO₂ Electrodes in Acidic Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;2006, 22(08): 1010-1014. doi: 10.3866/PKU.WHXB20060820 shu

Effect of Calcination Procedure on the Electrocatalytic Activities of Ti/IrO₂ Electrodes in Acidic Aqueous Solution

1.
Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China; State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China

Received Date: 24 January 2006
Available Online: 7 July 2006

The influence of the calcination procedure on electrocatalytic properties for oxygen evolution at Ti/IrO2 electrodes was investigated by using cyclic voltammetry (CV) and anodic polarization tests. Thermal decomposition at single temperature of 500 ℃ for each layer (conventional method) was adopted as the standard procedure. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) show the standard procedure leads to compact oxide coatings, with large grain distributing on coatings and high resistance of obtained electrodes. Both applying the lower temperatures in first three under-layers (step-method) and the programming heating in each layer can, to some extent, overcome the disadvantages of the conventional procedure, and thereby improve the electrochemical activities of electrodes. By using the modified procedures, the electrode resistance is found to decrease due to the inhibition of substrate oxidation. When using the controlled programming calcination (heating rate), the coating becomes more porous and rugged.
- Ti/IrO2electrode;Thermal decomposition;Salcination procedure;Electrocatalyticactivities
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of Calcination Procedure on the Electrocatalytic Activities of Ti/IrO2 Electrodes in Acidic Aqueous Solution

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通讯作者: 陈斌, bchen63@163.com

Effect of Calcination Procedure on the Electrocatalytic Activities of Ti/IrO₂ Electrodes in Acidic Aqueous Solution