Structural optimization of gas diffusion electrodes loaded with LaMnO 3 electrocatalysts

Masayoshi Yuasa, Akiko Koga, Tetsuya Kida, Kengo Shimanoe, Noboru Yamazoe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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 LaMnO 3 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 LaMnO 3/KB and LaMnO3/VX catalyst layers, which consequently leads to an improvement in the electrode performance.

Original languageEnglish
Pages (from-to)675-681
Number of pages7
JournalJournal of Applied Electrochemistry
Issue number3
Publication statusPublished - Mar 2010

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry
  • Materials Chemistry


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