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

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 06期

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

页码：915 / 921

页数：7

共 19 条

[1] EFFECT OF PREPARATION ON THE SURFACE AND ELECTROCATALYTIC PROPERTIES OF RUO2 + IRO2 MIXED-OXIDE ELECTRODES [J].