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1996 Fiscal Year Final Research Report Summary

Electrochemical Construction of Hydrogenation System Using Active Hydrogen at Hydrogen Storage Alloy/Gas Interphase

Research Project

Project/Area Number 07651001
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 工業物理化学
Research InstitutionOsaka Prefecture University

Principal Investigator

IWAKURA Chiaki  Osaka Prefecture University, College of Engineering, Professor, 工学部, 教授 (00029183)

Co-Investigator(Kenkyū-buntansha) INOUE Hiroshi  Osaka Prefecture University, College of Engineering, Associate Professor, 工学部, 講師 (00213174)
FUKUMOTO Yukio  Osaka Prefecture University, College of Engineering, Associate Professor, 工学部, 助教授 (80081339)
Project Period (FY) 1995 – 1996
KeywordsHydrogen Storage Alloy / Palladium / Active Hydrogen / Hydrogenation / Unsaturated Organic Compound / Sheet Electrode / Hydrogen Diffusion Coefficient / Volmer-Tafel Mechanism
Research Abstract

The information obtained from this work can be summarized as follows.
1. Hydrogen diffusion coefficient (Einstein diffusion coefficient) in MmNi_<4.2>Al_<0.5>M_<0.3> (Mm=misch metal, M=Cr, Mn, Fe, Co, Ni) alloys decreases with an increase in atomic radius of M because of enhanced stability of absorbed hydrogen in them. In addition, hydrogen evolution reaction at Mm(B_5)_x (B_5=Ni_<3.6>Mn_<0.4>Al_<0.3>Co_<0.7>,0.8*x*1.12) alloy electrodes proceeds via the Volmer-Tafel mechanism irrespective of x value. An increase in x value depresses the Tafel reaction effectively, leading to promotion of hydrogen absorption in the alloys.
2. A new successive system for hydrogenation of stirene was constructed using a two-compartment cell separated by a Pd sheet electrode. The amount of produced ethylbenzene increases linearly after an appropriate induction period and current efficiency for ethylbenzene production is over 90%. The rate of ethylbenzene production increases with an increase in current density for electrolysis of water. The hydrogenation system can be also constructed by using hydrogen storage alloy sheet electrodes prepared by rapid-quenching method.
3. The above-mentioned hydrogenation system can be applied to the hydrogenation of alpha-methylstirene, 1-octene, 2-octene and cyclohexene, and the hydrogenation rate increases in the order of cyclohexene<2-octene<alpha-methylstirene<1-octene<stirene. The hydrogenation of acetylene, gaseous unsaturated organic compound, also proceeds and ethane is produced via ethylene.
4. Pd black, which is well-known to show high catalytic activity for the hydrogenation, can be deposited three-dimensionally by a reaction of Pd^<2+> with active hydrogen passing through a Pd sheet electrode. The hydrogenation rates of 4-methylstirene and 2-octene using a palladinized Pd sheet electrode increase markedly in comparison with those using a Pd sheet electrode.

  • Research Products

    (46 results)

All Other

All Publications (46 results)

  • [Publications] Chiaki Iwakura: "Surface Modification of Laves-Phase ZrV_<0.5>Mn_<0.5> Ni Alloy Electrodes with an Alkaline Solution Containing Potassium Borohydride as a Reducing Agent" Electrochim.Acta. 40・5. 561-566 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukio Fukumoto: "Effect of Stoichiometric Ratio on Electrochemical Properties of Hydrogen Storage Alloys for Nikel-Metal Hydride Batteries" Electrochim.Acta. 40・7. 845-848 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Kinetics of Hydrogen Evolution Reaction at Nonstoichiometric Hydrogen Storage Alloys for Nickel-Hydrogen Batteries" J.Alloys Comp.231. 558-561 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukio Fukumoto: "Electrochemical Properties of the Non-stoichiometric Hydrogen Srorage Alloys for Nickel-Hydrogen Batteries" J.Alloys Comp.231. 562-564 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Effect of Alloy Composition on Hydrogen Diffusion in the AB_5-Yype Hydrogen Storage Alloys" J.Electroanal.Chem.398. 37-41 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Effects of Substitution with Foreign Metals on the Crystallographic, Thermodynamic and Electrochemical Properties of AB_5-Type Hydrogen Storage Alloys" Electrochim.Acta. 41・1. 117-121 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi Inoue: "Successive Hydrogenation of Styrene at a Palladium Sheet Electrode Combined with Electrochemical Supply of Hydrogen" Chem.Commun.・1. 55-56 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Effect of Temperature on Electrochemical Characteristics of Mg_2Ni Alloy" Electrochim.Acta. 41・3. 471-472 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi Inoue: "Crystallographic and Electrochemical Characterization of TiV_<4-x>Ni_x Alloys for Nickel-Metal Hydride Batteries" Electrochim.Acta. 41・6. 937-939 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "A New Successive System for Hydrogenation of Styrene Using a Two-Compartment Cell Separated by a Pd Sheet Electrode" J.Electrochem.Soc.143・4. L71-L72 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Munehisa Ikoma: "Self-Discharge Mechanism of Sealed-Type Nickel/Metal-Hydride Battery" J.Electrochem.Soc.143・6. 1904-1907 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukio Fukumoto: "Effect of Alloy Composition on Enthalpy and Entropy Changes of Hydride Formation for Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" J.Alloys Comp.240. 76-78 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Effect of Alloy Composition on Electrochemical Properties of the Zr-Based Laves-Phase Hydrogen Storage Alloys" Electrochim.Acta. 41・17. 2691-2694 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Surface Modification of MgNi Alloy with Graphite by Ball-Milling for Use in Nickel-Metal Hydride Batteries" Chem.Commun.・15. 1831-1832 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Kinetics of the Hydrogen Evolution Reaction in Stoichiometric and Non-stoichiometric Hydrogen Storage Alloys for Nickel-Hydrogen Batteries" J.Electroanal.Chem.411. 109-113 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi Inoue: "Kinetics of the Hydrogen Evolution Reaction at Various Zr-Based Laves-Phase Hydrogen-Storage Alloy Electrodes" J.Electrochem.Soc.143・8. 2527-2530 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi Inoue: "Electrochemical Characterization of Absorbed Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" Electrochim.Acta. 42・7. 1087-1090 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sinji Nohara: "Effect of Surface Modification of a MgNi Alloy with Graphite by Ball-Milling on the Rate of Hydrogen Absorption" J.Alloys Comp.(in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Effect of Stoichiometric Ratio on Discharge Efficiency of Hydrogen Storage Alloy Electrodes" J.Alloys Comp.(in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Electrochemical Evaluation of Thermodynamic Parameters for Dissolved Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Srorage Alloys" J.Alloys Comp.(in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Chiaki Iwakura: "Compositional and Structural Characteristics of MgNi Alloy Prepared by Mechanical Alloying for Use as Negative Electrodes in Nickel-Metal Hydride Batteries" J.Alloys Comp.(in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tetsuo Sakai: "Handbook on the Physics and Chemistry of Rare Earths." Elsevier Science, 420 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩倉 千秋: "電池技術" (社) 電気化学会電池技術委員会, 211 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.Iwakura: "Surface modification of Laves Phase ZrV_<0.5>Mn_<0.5>Ni Alloy Electrodes with an Alkane Solution Containing Potassium Borohydride as a Reducing Agent" Electrochim. Acta. 40-5. 561-566 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Fukumoto: "Effect of the Stoichiometric Ratio on Electrochemical Properties of Hydrogen Storage Alloys for Nickel-Metal Hydride Batteries" Electrochim. Acta. 40-7. 845-848 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Kinetics of Hydrogen Evolution Reaction at Nonstoichiometric Hydrogen Storage Alloys for Nickel-Hydrogen Batteries" J.Alloys Comp. 231. 558-561 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Fukumoto: "Electrochemical Properties of the Non-stoichiometric Hydrogen Storage Alloys for Nickel-Hydrogen Batteries" J.Alloys Comp. 231. 562-564 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Effect of Alloy Composition on Hydrogen Diffusion in the AB_5-Type Hydrogen Storage Alloys" J.Electroanal.Chem. 398. 37-41 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Effects of Substitution with Foreign Metals on the Crystallographic, Thermodynamic and Electrochemical Properties of AB_5-Type Hydrogen Storage Alloys" Electrochim. Acta. 41-1. 117-121 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Inoue: "Successive Hydrogenation of Stirene at a Palladium Sheet Electrode Combined with Electrochemical Supply of Hydrogen" Chem.Commun. 1. 55-56 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Effect of Temperature on Electrochemical Characteristics of Mg_2Ni Alloy" Electrochim.Acta. 41-3. 471-472 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Inoue: "Crystallographic and Electrochemical Characterization of TiV_<4-x>Ni_x Alloys for Nickel-Hydrogen Batteries" Electrochim.Acta. 41-6. 937-939 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "A New Successive System for Hydrogenation of Stirene Using a Two-Compartment Cell Separated by a Pd Sheet Electrode" J.Electrochem.Soc.143-4. L71-L72 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Ikoma: "self-Discharge Mechanism of Sealed-Type Nickel/Metal-Hydride Battery" J.Electrochem.Soc.143-6. 1904-1907 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Fukumoto: "Effect of Alloy Composition on Enthalpy and Entropy changes of Hydride Formation for Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" J.Alloys Comp.240. 76-78 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Effect of Alloy Composition on Electrochemical Properties of the Zr-Based Laves-Phase Hydrogen Storage Alloys" Electrochim.Acta. 41-17. 2691-2694 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Surface Modification of MgNi Alloy with Graphite by Ball-Milling for Use in Nickel-Metal Hydride Batteries" Chem.Commun.15. 1831-1832 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Kinetics of Hydrogen Evolution Reaction in Stoichiometric and Non-stoichiometric Hydrogen Storage Alloys for Nickel-Hydrogen Batteries" J.Electroanal.Chem.411. 109-113 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Inoue: "Kinetics of the Hydrogen Evolution Reaction at Various Zr-Based Laves-Phase Hydrogen-Storage Alloy Electrodes" J.Electrochem.Soc.143-8. 2527-2530 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Inoue: "Electrochemical Characterization of Absorbed Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" Electrochim.Acta. 42-7. 1087-1090 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Nohara: "Effect of Surface Modification of a MgNi Alloy with Graphite by Ball-Milling on the Rate of Hydrogen Absorption" J.Alloys Comp. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Effect of Stoichiometric Ratio on Discharge Efficiency of Hydrogen Storage Alloy Electrodes" J.Alloys Comp. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: "Electrochemical Evaluation of Thermodynamic Parameters for Dissolved Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" J.Alloys Comp. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Nohara: "Compositional and Structural Characteristics of MgNi Alloy Prepared by Mechanical Alloying for Use as Negative Electrodes in Nickel-Metal Hydride Batteries" J.Alloys Comp. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sakai: Handbook on the Physics and Chemistry of Rare Earths. Elsevier Science, 420 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Iwakura: Battery Technology. The Committee of Battery Technology, The Electrochemical Society of Japan, 211 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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