Exploration of reverse micelle synthesis of carbon-supported LaMnO 3

M. Yuasa, G. Sakai, Kengo Shimanoe, Y. Teraoka, N. Yamazoe

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Reverse micelle (RM) based synthesis of carbon-supported perovskite type oxide (LaMnO3) was investigated. By using cyclohexane as oil phase, six kinds of nonionic surfactants were tested for the formation of the revere micelle dispersions containing aqueous solutions of mixed nitrates of La 3+ and Mn2+ (RM-N) and tetramethylammonium hydroxide (RM-A) at the water/surfactant molar ratio (Rw) of 3. RM-A was found to be more difficult to form compared with RM-N or the RM containing pure water. At a temperature range of 5-25°C, it was given only by the surfactants with hydrophilic-lipophilic balance (HLB) values of 10.0-10.9. Phase diagrams of oil-surfactant-alkaline solution (or pure water) were constructed at 5 and 15°C for the best two surfactants, i.e., poly-(oxyetylene) 6-nonylphenyl ether and poly-(oxyetylene)5-lauryl ether. Mixing RM-N and RM-A together gave the RM containing a mixed hydroxides-precursor (RM-P), which was further converted into carbon-supported LaMnO3 through a series of treatments including the addition of carbon powder and calcination in N2 atmosphere at 600°C. The size of RM-P as well as that of the LaMnO3 grains supported on carbon could be controlled well by selecting Rw. The carbon-supported LaMnO3 proved to be highly active for the electrochemical reduction of oxygen.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume151
Issue number9
DOIs
Publication statusPublished - 2004

Fingerprint

Micelles
micelles
Carbon
carbon
synthesis
Surface-Active Agents
surfactants
Surface active agents
Ether
hydroxides
Water
Ethers
ethers
Oils
oils
Hydroxides
water
Nonionic surfactants
Cyclohexane
Dispersions

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Exploration of reverse micelle synthesis of carbon-supported LaMnO 3. / Yuasa, M.; Sakai, G.; Shimanoe, Kengo; Teraoka, Y.; Yamazoe, N.

In: Journal of the Electrochemical Society, Vol. 151, No. 9, 2004.

Research output: Contribution to journalArticle

Yuasa, M. ; Sakai, G. ; Shimanoe, Kengo ; Teraoka, Y. ; Yamazoe, N. / Exploration of reverse micelle synthesis of carbon-supported LaMnO 3. In: Journal of the Electrochemical Society. 2004 ; Vol. 151, No. 9.
@article{58ad6f51f0e0489eaa9844d9049dcb80,
title = "Exploration of reverse micelle synthesis of carbon-supported LaMnO 3",
abstract = "Reverse micelle (RM) based synthesis of carbon-supported perovskite type oxide (LaMnO3) was investigated. By using cyclohexane as oil phase, six kinds of nonionic surfactants were tested for the formation of the revere micelle dispersions containing aqueous solutions of mixed nitrates of La 3+ and Mn2+ (RM-N) and tetramethylammonium hydroxide (RM-A) at the water/surfactant molar ratio (Rw) of 3. RM-A was found to be more difficult to form compared with RM-N or the RM containing pure water. At a temperature range of 5-25°C, it was given only by the surfactants with hydrophilic-lipophilic balance (HLB) values of 10.0-10.9. Phase diagrams of oil-surfactant-alkaline solution (or pure water) were constructed at 5 and 15°C for the best two surfactants, i.e., poly-(oxyetylene) 6-nonylphenyl ether and poly-(oxyetylene)5-lauryl ether. Mixing RM-N and RM-A together gave the RM containing a mixed hydroxides-precursor (RM-P), which was further converted into carbon-supported LaMnO3 through a series of treatments including the addition of carbon powder and calcination in N2 atmosphere at 600°C. The size of RM-P as well as that of the LaMnO3 grains supported on carbon could be controlled well by selecting Rw. The carbon-supported LaMnO3 proved to be highly active for the electrochemical reduction of oxygen.",
author = "M. Yuasa and G. Sakai and Kengo Shimanoe and Y. Teraoka and N. Yamazoe",
year = "2004",
doi = "10.1149/1.1782165",
language = "English",
volume = "151",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "9",

}

TY - JOUR

T1 - Exploration of reverse micelle synthesis of carbon-supported LaMnO 3

AU - Yuasa, M.

AU - Sakai, G.

AU - Shimanoe, Kengo

AU - Teraoka, Y.

AU - Yamazoe, N.

PY - 2004

Y1 - 2004

N2 - Reverse micelle (RM) based synthesis of carbon-supported perovskite type oxide (LaMnO3) was investigated. By using cyclohexane as oil phase, six kinds of nonionic surfactants were tested for the formation of the revere micelle dispersions containing aqueous solutions of mixed nitrates of La 3+ and Mn2+ (RM-N) and tetramethylammonium hydroxide (RM-A) at the water/surfactant molar ratio (Rw) of 3. RM-A was found to be more difficult to form compared with RM-N or the RM containing pure water. At a temperature range of 5-25°C, it was given only by the surfactants with hydrophilic-lipophilic balance (HLB) values of 10.0-10.9. Phase diagrams of oil-surfactant-alkaline solution (or pure water) were constructed at 5 and 15°C for the best two surfactants, i.e., poly-(oxyetylene) 6-nonylphenyl ether and poly-(oxyetylene)5-lauryl ether. Mixing RM-N and RM-A together gave the RM containing a mixed hydroxides-precursor (RM-P), which was further converted into carbon-supported LaMnO3 through a series of treatments including the addition of carbon powder and calcination in N2 atmosphere at 600°C. The size of RM-P as well as that of the LaMnO3 grains supported on carbon could be controlled well by selecting Rw. The carbon-supported LaMnO3 proved to be highly active for the electrochemical reduction of oxygen.

AB - Reverse micelle (RM) based synthesis of carbon-supported perovskite type oxide (LaMnO3) was investigated. By using cyclohexane as oil phase, six kinds of nonionic surfactants were tested for the formation of the revere micelle dispersions containing aqueous solutions of mixed nitrates of La 3+ and Mn2+ (RM-N) and tetramethylammonium hydroxide (RM-A) at the water/surfactant molar ratio (Rw) of 3. RM-A was found to be more difficult to form compared with RM-N or the RM containing pure water. At a temperature range of 5-25°C, it was given only by the surfactants with hydrophilic-lipophilic balance (HLB) values of 10.0-10.9. Phase diagrams of oil-surfactant-alkaline solution (or pure water) were constructed at 5 and 15°C for the best two surfactants, i.e., poly-(oxyetylene) 6-nonylphenyl ether and poly-(oxyetylene)5-lauryl ether. Mixing RM-N and RM-A together gave the RM containing a mixed hydroxides-precursor (RM-P), which was further converted into carbon-supported LaMnO3 through a series of treatments including the addition of carbon powder and calcination in N2 atmosphere at 600°C. The size of RM-P as well as that of the LaMnO3 grains supported on carbon could be controlled well by selecting Rw. The carbon-supported LaMnO3 proved to be highly active for the electrochemical reduction of oxygen.

UR - http://www.scopus.com/inward/record.url?scp=4944261830&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4944261830&partnerID=8YFLogxK

U2 - 10.1149/1.1782165

DO - 10.1149/1.1782165

M3 - Article

VL - 151

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 9

ER -