Highly dispersed LaCoO3 on carbon prepared via low-energy bead milling as an oxygen reduction electrocatalyst

Naoki Tachibana, Hiroki Kobayashi, Shoichi Somekawa, Kengo Shimanoe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this study, fine dispersion of LaCoO3 nanoparticles on carbon via low-energy bead milling was attempted. X-ray diffraction and scanning transmission electron microscopy revealed that LaCoO3 nanoparticle agglomerates formed by high-temperature calcination were broken up by milling with small beads at low rotation rate, while suppressing damage to the crystal structure. The low-energy bead-milled LaCoO3/carbon exhibited 2.7 times higher kinetic current density for the oxygen reduction at −0.15 V vs. Hg/HgO than as-synthesized LaCoO3/carbon; this enhancement may be attributed to the enlarged surface area and improved dispersion of the oxide on carbon.

Original languageEnglish
Pages (from-to)193-195
Number of pages3
JournalElectrochemistry
Volume87
Issue number3
DOIs
Publication statusPublished - May 5 2019

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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