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

Naoki Tachibana; Hiroki Kobayashi; Shoichi Somekawa; Kengo Shimanoe

doi:10.5796/electrochemistry.18-00094

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

Naoki Tachibana, Hiroki Kobayashi, Shoichi Somekawa, Kengo Shimanoe

Functional Materials Science

Research output: Contribution to journal › Article › peer-review

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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 language	English
Pages (from-to)	193-195
Number of pages	3
Journal	Electrochemistry
Volume	87
Issue number	3
DOIs	https://doi.org/10.5796/electrochemistry.18-00094
Publication status	Published - May 5 2019

All Science Journal Classification (ASJC) codes

Electrochemistry

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10.5796/electrochemistry.18-00094

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

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.",

author = "Naoki Tachibana and Hiroki Kobayashi and Shoichi Somekawa and Kengo Shimanoe",

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doi = "10.5796/electrochemistry.18-00094",

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AU - Tachibana, Naoki

AU - Kobayashi, Hiroki

AU - Somekawa, Shoichi

AU - Shimanoe, Kengo

PY - 2019/5/5

Y1 - 2019/5/5

N2 - 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.

AB - 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.

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

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