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Electrocatalytic Activity of layred transition-metal oxides for the anodic oxidation of methane.

Research Project

Project/Area Number 08650781
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionNagaoka University of Technology

Principal Investigator

SATO Kazunori  Nagaoka University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (20143828)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
Keywordsanode / solid electrolyte / fuel cell / layred oxides / proton-exchange / methane / transition metals / valence state
Research Abstract

New anode materials capable of the direct electrochemical oxidation of methane have been investigated. The LiMn_2O_4 spinel can be converted to HMn_2O_4, which shows a high catalytic activity for the gaseous oxidation of methane and butane. The high activity is caused by the specific valence state of teh surface Mnions due to the desorption of protons as hydrogen. The specific surface valence state of transition metal ions was found to be effective for the catalytic and electrocatalytic oxidation of fuels. Electrocatlytic reactions was investigated for the cells using a number of oxygen ion conductive electrolyte combined with the new anode materials. The proton desorption from the proton-exchanged transition metal oxideds and the combination 3d and 4d metals enhance the electrocatalytic activity for the anodic oxidation reaction of hydrogen by HCoO_2 and HCrO_2 and methane by PdCoO_2. The valence states of the transition metal ions allow hydrogen and methane to react efficiently with the oxygem ions transported through the electrolytes. This property of the layred transition metal oxides as the anode results in the genaration of high power density at alower temperatures below about 900゚C.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 佐藤 一則: "The Surface Structure of the Proton-Exchanged Lithium Manganese Oxide Spinels and Their Lithium-Ion Sieve Properies." Journal of Solid State Chemistry. 131. 84-93 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 佐藤 一則: "Electrode Acrivity of PdCoO_2 for The Anodic Oxidation of Methane on The Solid-Oxide Fuel Cell" Progress in Battery and Battery Materials. 17(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Sato, D.M.Poojary, A.Clearfield, M.Kohno, and Y.Inoue: " The surface structure of the proton-exchange lithium manganese oxide spinels nad their lithium-ion sieve properties" Journal of the Solid State Chemistry. Vol.131. 84-93 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Sato, M.Takezawa, M.Kohno, and Y.Inoue: "Electrode activity of PdCoO2 for the anodic oxidation of methane on the solid-oxide fuel cell" Progress in Batteries and Battery Materials. Vol.17 (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Sato(佐藤一則): "The Surface Structure of the Proton-Exchanged Lithium Manganese Oxide Spinels and Their Lithium-Ion Sieve Properties" Journal of Solid State Chemistry. 131. 84-93 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Sato(佐藤一則): "Electrode Activity of PdCoO2 for The Anodic Oxidation of Methane on The Solid-Oxide Fuel Cell(印刷中)" Progress in Battery and Battery Materials. 17. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Sato(佐藤一則): "The Surface Structure of the Proton-Exchanged Lithium Manganese Oxide Spinels and Their Lithium-Ion Sieve Properties" Journal of Solid State Chemistry. (印刷中).

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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