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Study on laser electrochemical detector

Research Project

Project/Area Number 03804043
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 分析・地球化学
Research InstitutionOsaka University

Principal Investigator

WATANABE Iwao  Osaka Univ. Chem. Assoc. Prof, 理学部, 助教授 (50028239)

Co-Investigator(Kenkyū-buntansha) HINOUE T  Osaka Univ. Chem. Asst., 理学部, 助手 (50143821)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥1,500,000 (Direct Cost: ¥1,500,000)
Keywordselectrochemical analysis / photo-induced electrode reaction / catalytic reaction / laser / microelectrode / マイクロ電極 / レ-ザ- / 電気化学検出器 / 光電気化学 / 分光電気化学
Research Abstract

In order to attain a high photon density on an electrode surface, a beam from Ar^+ laser (10 mw at 488 nm) or He-Ne laser (50 mw at 632.8 nm) was focused with an objective and was threw on the micro-electrode. The electrode reaction of [Fe(CN)_6]^<4-> to [Fe(CN)_6]^<3-> was promoted by the laser irradiation through the heating effect, while the reation of Fe^<2+> to Fe^<3+> was suppressed. The promotion and the supression were explained on a basis of change in entropy of the electrode reactions. On the other hand, catalytic current was found in a reaction system where a Fe(III) oxalate was reduced to a Fe(II) oxalate by the laser irradiation in the bulk solution and sequently the Fe(II) oxalate was oxidized at the electrode. The high photon density promoted the reaction cycle between reduction in the solution and the oxidation at the electrode. As the result, the catalytic current was observed. This reaction scheme is available for a new electrochemical analysis.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] N.Ogawa: "Electrochemical reduction of nitrate ion at mercury electrodes in the presence of alkaline-earth metal ions." Denki Kagaku. 60. 26-31 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Hinoue: "Observation of photopyroelectric signal in X-ray region." Chemistry Letters. 2127-2130 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] I.Watanabe: "Electronic states of ions and molecules in solution, in Structure and Dynamics in Solution,ed. by H. Ohtaki and H. Yamatera" Elsevier Science Publishers,Amsterdam., 16 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Ikeda: "Structure of metal complexes in solution by the EXAFS and XANES methods, in Structure and Dynamics in Solution, ed. by H. Ohtaki and H. Yamatera" Elsevier Science Publishers, Amsterdam., 18 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N. Ogawa: "Electrochemical reduction of nitrate at mercury electrode in the presence of alkaline-earth metal ion" Denki Kagaku. 60. 26-31 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T. Hinoue: "Observation of photopyroelectric signal in X-ray region" Chemistry Letters. 2127-2130 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] I. Watanabe: "Electronic states of ions and molecules in solution, in Structure and Dynamics ib Solution, ed. by H. Ohtaki and H. Yamatera" Elsevier Science Publishers, Amsterdam. 320-335 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S. Ikeda: "Structure of metal complexes in solution by the EXAFS and XANES methods, in Structure and Dynamics in Solution, ed. by H. Ohtaki and H. Yamatera" Elsevier Science Publishers, Amsterdam. 39-56 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Ogawa: "Electrochemical reduction of nitrate ion at mercury electrodes in the presence of alkaline-eath metal ions." Denki Kagaku. 60. 26-31 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Hinoue: "Observation of photopyroelectric signal in X-ray region." Chemistry Letters. 2127-2130 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] I.Watanabe: "Electronic states of ions and molecules in solution,in Structure and Dynamics in Solution,ed.by H.Ohtaki and H.Yamatera." Elsevier Science Publishers,Amsterdam., 320-335 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Ikeda: "Structure of metal complexes in solution by the EXAFS and XANES methods,in Structure and Dynamics in Solution,ed.by H.Ohtaki and H.Yamatera." Elsevier Science Publishers,Amsterdam., 39-56 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] I.Watanabe: "Photoelectron Emission Study of Iron(II) and Cobalt(II) Complexes in Aqueous Solution" Bull.Chem.Soc.Jpn.64. 352-357 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Izumi: "Activation of a Gold Electrode by Electrochemical OxidationーReduction Pretreatment in Hydrochloric Acid" J.Electroanal.Chem.303. 151-160 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Monjushiro: "Ultraviolet Photoelectron Yield Spectra of Thin Gold Films Measured in Air" Anal.Sciences. 7. 543-547 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Ogawa: "Electrochemical Reduction of Nitrate Ion at Mercury Electrodes in the Presence of AlkalineーEarth Metal Ions" Denki Kagaku. 60. 26-31 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Hinoue: "Photopyroelectric Spectrometry and Its Application to the Determination of Trace Constituents in Natural Water" Anal.Chem.63. 2086-2090 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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