1996 Fiscal Year Annual Research Report

水素吸蔵合金/気相界面を反応場とする活性水素反応系の電気化学的構築

Research Project

Project/Area Number	07651001
Research Institution	Osaka Prefecture University
Principal Investigator	岩倉千秋大阪府立大学, 工学部, 教授 (00029183)
Co-Investigator(Kenkyū-buntansha)	井上博史大阪府立大学, 工学部, 講師 (00213174) 福本幸男大阪府立大学, 工学部, 助教授 (80081339)
Keywords	水素吸蔵合金 / パラジウム / 活性水素 / 水素添加反応 / 不飽和有機化合物
Research Abstract	平成8年度に得られた知見をまとめると以下のようになる。 1)水素吸蔵合金を用いる連続的なスチレンへの水素添加反応の電気化学的構築パラジウム薄板電極の代わりにLaNi_5やMmNi_<2.4>Al_<0.5>Mn_<0.3>合金薄板を超急冷法により作製した。これらの合金薄板をカソードとして用いて水素発生反応を行い、生成した活性水素を合金内に優先的に吸蔵させた。そして、合金内に吸蔵された後、拡散して背面に到達した活性水素を用いて、スチレンからエチルベンゼンへの水素添加反応を行った。その結果、パラジウム薄板に比べて合金薄板の方が約10倍厚かったために水素添加反応速度は低かったものの、80時間以上も触媒活性が落ちることなく反応が進行することを見出した。 2)水素吸蔵金属を用いる他の連続的な水素添加反応の構築 1)で構築した連続的水素添加反応システムを用いて、スチレン以外の液体不飽和有機化合物であるα-メチルスチレン、1-オクテン、2-オクテン、シクロヘキセンの水素添加反応を行った。その結果、いずれの場合にも継続的に水素添加反応が進行し、クメン、オクタン、シクロヘキサンが副生成物である水素ガスとともに生成することを見出した。しかも、水素添加反応速度は、シクロヘキセン<2-オクテン<α-メチルスチレン<1-オクテン<スチレンの順に増大することが明らかになった。また、気体不飽和有機化合物であるアセチレンの水素添加反応も1)で構築したシステムを用いることにより連続的に進行し、エチレンを経てエタンが生成することを明らかにした。

Research Products
(18 results)

All Other

All Publications (18 results)

[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)
[Publications] Hiroshi Inoue: "Successive Hydrogenation of Styrene at a Palladium Sheet Electrode Combined with Electrochemical Supply of Hydrogen" Chem. Commun.・1. 55-56 (1996)
[Publications] Chiaki Iwakura: "Effect of Temperature on Electrochemical Characteristics of Mg_2Ni Alloy" Electrochim. Acta. 41・3. 471-472 (1996)
[Publications] Hiroshi Inoue: "Crystallographic and Electrochmical charactevization of TiV_<4-X>Ni_XAlloys for Nickel-Metal Hydride Batteries" Electrochim. Acta. 41・6. 937-939 (1996)
[Publications] Chiaki Iwakura: "A New Successive System for Hydrogenation of Styrene Using Two-Compatrment Cell Separated by a Pd Sheet Electrode" J. Electrochem. Soc.143・4. L71-L72 (1996)
[Publications] Munehisa Ikoma: "Self-Discharge Mechanism of Sealed-Type Nickel/Metal-Hydride Battery" J. Electrochem. Soc.143・6. 1904-1907 (1996)
[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)
[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)
[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)
[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)
[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)
[Publications] Hiroshi Inoue: "Electrochemical Characterization of Absorbed Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" Electrochim. Acta.42・7. 1087-1090 (1997)
[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). (1997)
[Publications] Chiake Iwakura: "Effect of Stoichimetric Ratio on Discharge Efficiency of Hydrogen Storage Alloy Electrodes" J. Alloys Comp.(in press). (1997)
[Publications] Chiaki Iwakura: "Electrochemical Evaluation of Ther modynamic Parameters for Dissolved Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" J. Alloys Comp.(in press). (1997)
[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)
[Publications] Tetsuo Sakai: "Handbook on the Physics and Chemistry of Rare Earths" Elsevier Science, 420 (1995)
[Publications] 岩倉千秋: "電池技術" (社)電気化学会電池技術委員会, 211 (1996)

1996 Fiscal Year Annual Research Report

水素吸蔵合金/気相界面を反応場とする活性水素反応系の電気化学的構築

Principal Investigator

岩倉 千秋 大阪府立大学, 工学部, 教授 (00029183)

Research Products

[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)

[Publications] Hiroshi Inoue: "Successive Hydrogenation of Styrene at a Palladium Sheet Electrode Combined with Electrochemical Supply of Hydrogen" Chem. Commun.・1. 55-56 (1996)

[Publications] Chiaki Iwakura: "Effect of Temperature on Electrochemical Characteristics of Mg_2Ni Alloy" Electrochim. Acta. 41・3. 471-472 (1996)

[Publications] Hiroshi Inoue: "Crystallographic and Electrochmical charactevization of TiV_<4-X>Ni_XAlloys for Nickel-Metal Hydride Batteries" Electrochim. Acta. 41・6. 937-939 (1996)

[Publications] Chiaki Iwakura: "A New Successive System for Hydrogenation of Styrene Using Two-Compatrment Cell Separated by a Pd Sheet Electrode" J. Electrochem. Soc.143・4. L71-L72 (1996)

[Publications] Munehisa Ikoma: "Self-Discharge Mechanism of Sealed-Type Nickel/Metal-Hydride Battery" J. Electrochem. Soc.143・6. 1904-1907 (1996)

[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)

[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)

[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)

[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)

[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)

[Publications] Hiroshi Inoue: "Electrochemical Characterization of Absorbed Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" Electrochim. Acta.42・7. 1087-1090 (1997)

[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). (1997)

[Publications] Chiake Iwakura: "Effect of Stoichimetric Ratio on Discharge Efficiency of Hydrogen Storage Alloy Electrodes" J. Alloys Comp.(in press). (1997)

[Publications] Chiaki Iwakura: "Electrochemical Evaluation of Ther modynamic Parameters for Dissolved Hydrogen in Stoichiometric and Nonstoichiometric Hydrogen Storage Alloys" J. Alloys Comp.(in press). (1997)

[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)

[Publications] Tetsuo Sakai: "Handbook on the Physics and Chemistry of Rare Earths" Elsevier Science, 420 (1995)

[Publications] 岩倉 千秋: "電池技術" (社)電気化学会電池技術委員会, 211 (1996)

岩倉千秋大阪府立大学, 工学部, 教授 (00029183)

[Publications] 岩倉千秋: "電池技術" (社)電気化学会電池技術委員会, 211 (1996)