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Effect of Different Shapes of the Titanium Based IrO2-Ta2O5 Coatings Anode on Electrochemical Properties
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Effect of Different Shapes of the Titanium Based IrO2-Ta2O5 Coatings Anode on Electrochemical Properties
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    摘要:

    鈦基IrO2-Ta2O5涂層陽極的形狀分別是板狀和擴(kuò)張網(wǎng)。采用涂覆了H2IrCl6·H2O的鹽酸溶液和TaCl5乙醇溶液的混合溶液再進(jìn)行熱分解制備得到IrO2-Ta2O5涂層。分別采用SEM，EDX，CV和加速壽命測試對(duì)電極的微觀結(jié)構(gòu)和電化學(xué)性能進(jìn)行分析。相對(duì)板狀電極而言，由于較少的活性物質(zhì)IrO2在電極表面結(jié)晶析出，擴(kuò)張網(wǎng)狀電極具有更低的電化學(xué)催化活性。但是由于表面的裂紋較為細(xì)密、表面活性元素分布也較為均勻，并且其縱截面的形狀更有利于電解析出的氣泡排出，擴(kuò)張網(wǎng)狀電極具有更長的加速壽命。

    Abstract:

    The titanium substrates of IrO2-Ta2O5 coating anodes were manufactured into plate and expanded mesh, respectively. The coatings were prepared by conventionally thermal decomposition with a mixture of H2IrCl6·6H2O dissolved in hydrochloric acid and TaCl5 dissolved in alcohol. The microstructure and electrochemical properties of the electrodes were studied with SEM, EDX, CV and accelerated life test. Compared with plate shape anode, expanded mesh anode has a little lower electrochemical activity due to less active IrO2 crystals precipitation out on it and slender cracks. However, it has longer accelerated life time due to steady and well-distributed ingredient of the coatings and less differences of the atom ratio of Ir and Ta of bulging area and flat area.

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閆鎮(zhèn)威,孟惠民. Effect of Different Shapes of the Titanium Based IrO2-Ta2O5 Coatings Anode on Electrochemical Properties[J].稀有金屬材料與工程,2012,41(5):772~775.[Yan Zhenwei, Meng Huimin. Effect of Different Shapes of the Titanium Based IrO2-Ta2O5 Coatings Anode on Electrochemical Properties[J]. Rare Metal Materials and Engineering,2012,41(5):772~775.]
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  • 收稿日期:2011-05-15
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