EQCM study on dissolution of ruthenium in sulfuric acid

Y. Sugawara, A. P. Yadav, A. Nishikata, T. Tsuru

研究成果: Article査読

39 被引用数 (Scopus)


This study reports on the nanolevel dissolution and polarization behavior of electrodeposited Ru in 0.5 mol L-1 H2SO4 solution with the help of an electrochemical quartz crystal microbalance (EQCM) and inductively coupled plasma-mass spectrometry (ICP-MS) analysis. Results of the cyclic voltammetry showed that during anodic polarization a mass gain at Ru electrode was observed from -0.1 V due to water adsorption and the significant mass gain due to Ru oxide formation was observed from 0.5 V; the start of these processes depended on the potential. ICP-MS analysis of the solution after potential cycling of the Ru electrode showed that only a slight amount of the dissolution occurred when the potential was less than 0.5 V, but the amount of dissolution significantly increased from 0.5 V onward. The potential cycle accelerated the dissolution of Ru. A simple immersion test revealed that the potential of Ru increased until 0.8 V from -0.1 V during the immersion. This shows that the on-off cycle of a polymer electrolyte fuel cell (PEFC) can induce the potential cycle; this will lead to accelerate the dissolution of Ru in the anode catalyst of the PEFC.

ジャーナルJournal of the Electrochemical Society
出版ステータスPublished - 2008 8 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学


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