Journal of Applied Electrochemistry

, Volume 40, Issue 3, pp 675–681 | Cite as

Structural optimization of gas diffusion electrodes loaded with LaMnO3 electrocatalysts

  • Masayoshi Yuasa
  • Akiko Koga
  • Tetsuya Kida
  • Kengo Shimanoe
  • Noboru Yamazoe
Original Paper


In this study, gas diffusion electrodes (GDEs) with two catalyst layers were fabricated and tested for their electrode performance for oxygen reduction in an alkaline solution. The LaMnO3/carbon black catalyst layers were fabricated using a reverse micelle method to finely disperse the LaMnO3 particles onto the carbon matrices, for which commercial Ketjen Black (KB) (1270 m2 g−1) and Vulcan XC-72R (VX) (254 m2 g−1) were used. The three-layer-structured GDE with the two LaMnO3/KB and LaMnO3/VX catalyst layers exhibited a superior oxygen reduction activity when compared to that of a conventional GDE with only one LaMnO3/KB catalyst layer. Pore size distribution and gas permeability measurements revealed that the LaMnO3/VX layer was more porous and had higher gas permeability than the LaMnO3/KB layer. These results suggest that the intermediate layer of LaMnO3/VX can efficiently supply oxygen to reaction sites dispersed in the LaMnO3/KB and LaMnO3/VX catalyst layers, which consequently leads to an improvement in the electrode performance.


Gas diffusion electrode Oxygen reduction Pt-free catalyst Brine electrolysis 



This study was supported by CREST of JST (Japanese Science and Technology Corporation).


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Masayoshi Yuasa
    • 1
  • Akiko Koga
    • 2
  • Tetsuya Kida
    • 1
  • Kengo Shimanoe
    • 1
  • Noboru Yamazoe
    • 1
  1. 1.Department of Energy and Material Sciences, Faculty of Engineering SciencesKyushu UniversityKasuga-shiJapan
  2. 2.Department of Energy Science and EngineeringKyushu UniversityKasuga-shiJapan

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