Synthesis of ruthenium particles by photoreduction in polymer solutions

被引：21

作者：

Harada, Masafumi ^{[1
]}

Takahashi, Saki ^{[1
]}

机构：

[1] Nara Womens Univ, Fac Human Life & Environm, Dept Hlth Sci & Clothing Environm, Nara 6308506, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 325卷 / 01期

关键词：

colloidal dispersions; ruthenium; polymer-stabilized particles; photoreduction; EXAFS;

D O I：

10.1016/j.jcis.2008.05.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Colloidal dispersions of poly(N-vinyl-2-pyrrolidone)-protected ruthenium (Ru) particles have been synthesized by the photoreduction of Ru(III) ionic solutions in the presence of photo-activator such as benzophenone and benzoin. The size and the structure of the synthesized particles have been extensively investigated by UV-vis, transmission electron micrograph (TEM) and extended X-ray absorption fine structure (EXAFS). Metallic Ru particles with an average diameter of 1.3 nm were successfully synthesized in the presence of benzophenone, although mixtures of partly oxidized Ru particles and metallic Ru particles were synthesized in the presence of benzoin. Photoreduction of Ru(III) ionic precursors to Ru atoms was promoted by ketyl radicals, which is more efficiently generated by the photoirradiation of benzophenone than by that of benzoin. The photoirradiation of benzophenone in the Ru(III) ionic solutions is an efficient and convenient method to produce metallic Ru particles in polymer solutions rather than the refluxing and the hydrothermal method of ionic solutions of Ru. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：1 / 6

页数：6

共 29 条

[1] Characterization of the structure of RuO2-IrO2/Ti electrodes by EXAFS [J].