Study on the electro-activity and non-stochiometry of a Ru-based mixed oxide electrode

被引:53
作者
Kim, KW [1 ]
Lee, EH
Kim, JS
Shin, KH
Kim, KH
机构
[1] Korea Atom Energy Res Inst, Taejon 305600, South Korea
[2] Hannam Univ, Dept Chem Engn, Taejon, South Korea
[3] Pusan Natl Univ, Dept Inorgan Mat Engn, Pusan 609735, South Korea
关键词
non-stochiometry; Ru oxide; catalytic oxide; electro-activity; organic oxidation;
D O I
10.1016/S0013-4686(00)00674-5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Catalytic oxide electrodes of Ru /Ti, Ru-Sn-/Ti, and Ru-Sn-Ti-/Ti effective in destroying refractory organics in aqueous waste were studied in terms of material and electrochemical properties. The portion of non-stochiometry, RnOx (0 < x < 2) and chloride-bonded Ru within the Ru-based oxide were evaluated by deconvolution of XPS of the oxide with a change of sintering temperature. RuOx mostly existed around 450 degreesC, and disappeared at 600 degreesC. The component of chloride-bonded Ru decreased nearly linearly from 350 to 600 degreesC. The non-stochiometry resulted from the incomplete decomposition of metal chloride in the precursor solution. The existence of non-stochiometry was confirmed to have a close relation to the electrochemical activity of the oxide electrode. The segregation phenomena of Sn and the existence of chloride in Ru Sn Ti-/Ti oxide after sintering were confirmed by AES, XPS, and EPMA. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:915 / 921
页数:7
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