Synthesis of ordered mesoporous ruthenium by lyotropic liquid crystals and its electrochemical conversion to mesoporous ruthenium oxide with high surface area

JOURNAL OF POWER SOURCES

卷:204

Article

Sugimoto, Wataru^1,2  Makino, Sho¹  Mukai, Ryota¹  Tatsumi, Yoshiaki¹  Fukuda, Katsutoshi²  Takasu, Yoshio¹  Yamauchi, Yusuke^3,4 

[1] Shinshu Univ, Fac Text Sci & Technol, Nagano 3868567, Japan

[2] Shinshu Univ, Collaborat Innovat Ctr Nanotech Fiber, Nagano 3868567, Japan

[3] Natl Inst Mat Sci, World Premier Int Res Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan

[4] Japan Sci & Technol Agcy, Kawaguchi, Saitama 3320012, Japan

关键词: Mesoporous materials;    Electrochemistry;    Lyotropic liquid crystal;    Supramolecular templating;    Electrochemical capacitor;    Ruthenium black;   

DOI  :  10.1016/j.jpowsour.2011.12.033

来源: Elsevier

【 摘 要 】

In ordered to prepare high capacitance pseudo-capacitive oxides, it is important to design nanostructures with appreciable mesopores. Supramolecular templating has become a popular method to synthesize ordered mesoporous metals; however, the application of the same technique to synthesis of high surface area oxides is more demanding. We present here, the synthesis of ordered mesoporous ruthenium metal by lyotropic liquid crystal templating and its electrochemical conversion to ordered mesoporous ruthenium oxide by a simple, room temperature procedure. The bulk, unsupported metallic ordered mesoporous ruthenium exhibits high surface area of 110 m(2) g(-1), which is comparable to typical supported Ru nanoparticles. The oxide analogue gives a high specific capacitance of 376 Fg(-1), owing to the porous structure. These results demonstrate a possible facile and generic process to synthesize oxides with ordered nanostructures by utilization of the various phases that can be obtained with lyotropic liquid crystalline templates such as cubic, hexagonal, lamellar, etc. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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