Methanol Adsorption and Oxidation Behavior of Various Nanostructured Ruthenium-Oxides in Acidic Electrolyte

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概要

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• The electrochemical behavior of anhydrous rutile-type RuO2, hydrous rutile-type RuO2 (RuO2·0.6H2O), and ruthenate nanosheets derived from layered ruthenium oxide (H0.2RuO2.1) in CH3OH containing 0.5 M H2SO4 was studied. The pseudo-capacitance of rutile-type RuO2 nanoparticles decreased under the presence of methanol when cycled between 0.05–1.2 V vs. RHE (60°C), which is attributed to the adsorption of methanol onto the oxide surface. In contrast, the pseudo-capacitance for ruthenate nanosheets was not influenced by the presence of methanol. The results suggest that methanol adsorbs on the surface of RuO2 nanoparticles while no adsorption occurred on ruthenate nanosheets in potential regions of interest for the anodic reaction in direct methanol fuel cells. Thus, ruthenate nanosheets should act as a more efficient co-catalyst for methanol electro-oxidation.

• 公益社団法人 電気化学会の論文

著者

• TAKASU Yoshio

  Faculty of Textile Science and Technology, Shinshu University

• Sugimoto Wataru

  Faculty Of Textile Science And Technology Shinshu University

• Takasu Yoshio

  Faculty of Engineering, Yamaguchi University

• SAIDA Takahiro

  Faculty of Textile Science and Technology, Shinshu University

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