1998 Fiscal Year Annual Research Report

機能界面の電気化学的形成と高効率電池

Research Project

Project/Area Number	09237104
Research Institution	Osaka University
Principal Investigator	米山宏大阪大学, 大学院・工学研究科, 教授 (80029082)
Co-Investigator(Kenkyū-buntansha)	渡辺政廣山梨大学, 工学部, 教授 (00020412) 益田秀樹東京都立大学, 工学部, 助教授 (90190363) 小山昇東京農工大学, 工学部, 教授 (40134845) 逢坂哲彌早稲田大学, 理工学部, 教授 (20097249)
Keywords	軟磁性薄膜 / アンダーポテンシャル析出 / 自己集合膜 / 量子サイズ効果 / ポーラスアルミナ鋳型 / ポールアレイ / 有機電池活物質 / 燃料電池電極触媒
Research Abstract	(1) 電気化学反応を利用する高機能界面及び材料の創製 SとCdの交互アンダーポテンシャル析出によって作製したCdS超薄膜のバンドギャップを積層数の関数として求めた(米山).有機添加物を用いないで、メッキ浴組成をfccとbcc構造を与える境界組成に制御して作製したCoNiFe薄膜によって磁気記録へッドコア材料として望まれる飽和磁束密度(B_s=2.0-2.1)を有し、保持力が小さく(H_c<2Oe)、かつ低磁歪(l_s=+2〜7x10^<-6>)の軟磁性薄膜を実現した(逢坂).アルカンチオールの自己集合膜で被覆した金電極上へ銀のアンダーポテンシャル析出が金基体に吸着しているチオール分子を取り上げその間に割って入るような形で起こり、析出した銀に移動したチオール分子は還元脱離が起こり難くなることが明らかになった.(米山). (2) 種々のナノ構造加工技術を用いる新規な界面の創製とその特徴単分散CdSナノ粒子を金電極基板に化学結合を用いて固定することによって量子サイズ効果を示す光電極の作製に成功した(米山).約10μm^2の領域で周期500nm、細孔経400nmの六方細密配列のポーラスアルミナ作製技術を確立した,また、ポーラスアルミナを鋳型に用いてNiシリンダーアレイの作製するとともに、2段階転写プロセスにより、光透過性のNiホールアレイと水素吸蔵により膨張するPdホールアレイの作製に成功した(益田). (3) 電池反応における化学変化の原子スケールにおける解明と制御 2,5-ジメルカプ卜1,3,4-チアジアゾール(DMcT)とポリアニリン(PAn)複合膜が銅集電体電極で急速充放電が可能になる理由を解明した(小山).Pt-Fe、Pt-Ni系固溶合金が水素の電気化学酸化に際してC○被毒による活性低下を受けない理由を明らかにした.また、電極の電子状態が吸着COの酸化に及ぼす影響を明らかにした(渡辺).

Research Products
(27 results)

All Other

All Publications (27 results)

[Publications] B-J.Liu: "Photocatalytic reduction of CO_2 using surface-modified CdS Photocatalysts in organic solvents" J.Photochem.Photobiol.,A: Chcmistry. 113. 93-97 (1998)
[Publications] D.Oyamatsu: "Undcrpotcntial.Deposition of Silver onto Gold Substrales Covered With Self-Asscmblcd Monolaycrs of Alkancthiols To Induce Intervcntion of the Silver between the Monolayer and the Gold Substratc" Langmuir. 14(12). 3298-3302 (1998)
[Publications] T.Torimoto: "Characteristic Features of Size-Selective Photoetching of CdS Nanoparticles as a Means of Preparation of Monodisperse Particles" J.Electrochem.Soc.,. 145(6). 1964-1968 (1998)
[Publications] B-J.Liu: "Photocatalylic reduction of carbon dioxide in the presence of nitratc using TiO_2 microcrystal photocatalyst embedded in SiO_2 matrices" J.Photochem.Photobiol.,A: Chemistry. 115. 227-230 (1998)
[Publications] T.Torimoto: "Pholoelectrochemical Properties of Size-Quanlized CdS Thin Films Prepared by an Electrochemical.Method" Langmuir. 14(25). 7077-7081 (1998)
[Publications] M.Miyake: "Photoelectrochemical Characterization of Nearly Monodisperse CdS Nanoparticles-Immobilized Gold Electrodes" Langmuir. 15(4). 1503-1507 (1999)
[Publications] 米山宏: "半導体ナノ粒子表面上での光誘起電子移動" 触媒. 40(7). 544-551 (1998)
[Publications] 米山宏: "コンポジット系正極材料" 工業材料. 47(2). 44-47 (1999)
[Publications] 高井まどか: "電析法によるNiFeP軟磁性薄膜の高比抵抗化" 日本応用磁気学会誌. 22(4-2). 629-632 (1998)
[Publications] T.Osaka: "A Soft Magnetic CoNiFe Film with High Saturation Magnetic Fulx Density and Low Coercivity" Nature. 392(23). 396-397 (1998)
[Publications] 小野幸子: "Pd/Sn混合触媒を利用した銅のダイレクトプレーティング導体化過程の解析" 表面技術. 49(6). 625-631 (1998)
[Publications] T.Osaka: "New Soft Magnetic CoNiFe Plated Films with High Bs=2.0-2.1T" IEEE Trans.Magn.,. 34(4). 1432-1434 (1998)
[Publications] 横島時彦: "無電解NiBめっきを用いたマイクロパターニングにおける錯化剤の影響" 表面技術. 49(12). 1336-1342 (1998)
[Publications] 横島時彦: "無電解CoFeBめっきを用いた磁気ヘッドコア作製プロセスの基礎的検討" 日本応用磁気学会誌. (印刷中).
[Publications] 曽川禎道: "高Bs-CoNiFe電析膜の軟磁気特性に及ぼす成膜条件の影響" 日本応用磁気学会誌. (印刷中).
[Publications] F.Matsumoto: "Studies on the Adsorption Behavior of 2,5-Dimercapto-1,3,4-thiadiazole(DMcT)and 2-Mercapto-5-methyl-1,3,4-thiadiazole(McMT)at Au and Cu Electrode Surfaces" Langmuir. (in press).
[Publications] F.Matsumoto: "STM and QCM Studies on the Adsorption Behaviors of 2,5-Dimercapto-1,3,4-thiadiazole (DMcT)and 2-Mercapto-5-methyl-1,3,4-thiadiazole(McMT)at Au Electrode Surface." J.Electroanal.Chem.,. (in press). (1999)
[Publications] S.C.Paulson: "Addition of a-Hydroxyalkylferrocenes to Electrochemically Oxidized Poly(aniline)" J.Electroanal.Chem.,. (in press).
[Publications] Q.Chi: "Electrochemical Behavior and Surface Morphologic Changes of Copper Substracts in the Presence of 2,5-Dimercapto-1,3,4-thiadiazole Eelucidated by In Situ EQCM and Phase Measurement Interferometric Microscope" J.Electrochem.Soc.,. 145. 2369-2377 (1998)
[Publications] J.M.Pope: "Organosulfur/Conducting Polymer Composite Cathodes: I.Voltammetric Study of the Polymerization and Depolymerization of 2,5-Dimercapto-1,3,4-thiadiazole" J.Electrochem.Soc.,. 145. 1893-1901 (1998)
[Publications] H.Masuda: "Spatially Selective Metal Deposition into a Hole-Array Structure of Anodic Porous Alumina Using a Microelectrode" Jpn.J.Appl.Phys.,. 37(9A). 1090-1092 (1998)
[Publications] H.Masuda: "Self-Ordering of Cell Configuration of Anodic Porous Alumina with Large-Size Pores in Phosphoric Acid Solution" Jpn.J.Appl.Phys.,. 37(11A). 1340-1342 (1998)
[Publications] M.Watanabe: "Polymer Electrolyte Membranes Incorporated with Nanometer-Size Particles of Pt and/or Metal-Oxides, Experimental Analysis of Self-Humidification and Suppression of Gas-Crossover in Fuel Cells." J.Phys.Chem.B. 102(17). 3129-3137 (1998)
[Publications] M.Watanabe: "Analyses of Self-Humidification and Suppression of Gas-Crossover in Pt-Dispersed Polymer Electrolyte Membranes for Fuel Cells" J.Electrochem.Soc.,. 145(4). 1137-1141 (1998)
[Publications] H.Uchida: "Electrochemical Quartz Crystal Microbalance Study of Copper Ad-atoms on Au(111) Electrodes in Solutions of Perchloric and Sulfuric Acid" J.Electroanal.Cehm.,. 452. 97-106 (1998)
[Publications] T.Toda: "Role of Electronic Property of Pt and Pt-Alloys on Electrocatalytic Reduction of Oxygen" J.Electrochem.soc.,. 145(2). 4185-4188 (1998)
[Publications] T.Toda: "Enhancement of the Electrocatalytic O_2 Reduction on Pt-Fe Alloys" J.Electroanal.Chem.,. 460(1). 21-25 (1999)

1998 Fiscal Year Annual Research Report

機能界面の電気化学的形成と高効率電池

Principal Investigator

米山 宏 大阪大学, 大学院・工学研究科, 教授 (80029082)

Research Products

[Publications] B-J.Liu: "Photocatalytic reduction of CO_2 using surface-modified CdS Photocatalysts in organic solvents" J.Photochem.Photobiol.,A: Chcmistry. 113. 93-97 (1998)

[Publications] D.Oyamatsu: "Undcrpotcntial.Deposition of Silver onto Gold Substrales Covered With Self-Asscmblcd Monolaycrs of Alkancthiols To Induce Intervcntion of the Silver between the Monolayer and the Gold Substratc" Langmuir. 14(12). 3298-3302 (1998)

[Publications] T.Torimoto: "Characteristic Features of Size-Selective Photoetching of CdS Nanoparticles as a Means of Preparation of Monodisperse Particles" J.Electrochem.Soc.,. 145(6). 1964-1968 (1998)

[Publications] B-J.Liu: "Photocatalylic reduction of carbon dioxide in the presence of nitratc using TiO_2 microcrystal photocatalyst embedded in SiO_2 matrices" J.Photochem.Photobiol.,A: Chemistry. 115. 227-230 (1998)

[Publications] T.Torimoto: "Pholoelectrochemical Properties of Size-Quanlized CdS Thin Films Prepared by an Electrochemical.Method" Langmuir. 14(25). 7077-7081 (1998)

[Publications] M.Miyake: "Photoelectrochemical Characterization of Nearly Monodisperse CdS Nanoparticles-Immobilized Gold Electrodes" Langmuir. 15(4). 1503-1507 (1999)

[Publications] 米山 宏: "半導体ナノ粒子表面上での光誘起電子移動" 触媒. 40(7). 544-551 (1998)

[Publications] 米山 宏: "コンポジット系正極材料" 工業材料. 47(2). 44-47 (1999)

[Publications] 高井まどか: "電析法によるNiFeP軟磁性薄膜の高比抵抗化" 日本応用磁気学会誌. 22(4-2). 629-632 (1998)

[Publications] T.Osaka: "A Soft Magnetic CoNiFe Film with High Saturation Magnetic Fulx Density and Low Coercivity" Nature. 392(23). 396-397 (1998)

[Publications] 小野幸子: "Pd/Sn混合触媒を利用した銅のダイレクトプレーティング導体化過程の解析" 表面技術. 49(6). 625-631 (1998)

[Publications] T.Osaka: "New Soft Magnetic CoNiFe Plated Films with High Bs=2.0-2.1T" IEEE Trans.Magn.,. 34(4). 1432-1434 (1998)

[Publications] 横島時彦: "無電解NiBめっきを用いたマイクロパターニングにおける錯化剤の影響" 表面技術. 49(12). 1336-1342 (1998)

[Publications] 横島時彦: "無電解CoFeBめっきを用いた磁気ヘッドコア作製プロセスの基礎的検討" 日本応用磁気学会誌. (印刷中).

[Publications] 曽川禎道: "高Bs-CoNiFe電析膜の軟磁気特性に及ぼす成膜条件の影響" 日本応用磁気学会誌. (印刷中).

[Publications] F.Matsumoto: "Studies on the Adsorption Behavior of 2,5-Dimercapto-1,3,4-thiadiazole(DMcT)and 2-Mercapto-5-methyl-1,3,4-thiadiazole(McMT)at Au and Cu Electrode Surfaces" Langmuir. (in press).

[Publications] F.Matsumoto: "STM and QCM Studies on the Adsorption Behaviors of 2,5-Dimercapto-1,3,4-thiadiazole (DMcT)and 2-Mercapto-5-methyl-1,3,4-thiadiazole(McMT)at Au Electrode Surface." J.Electroanal.Chem.,. (in press). (1999)

[Publications] S.C.Paulson: "Addition of a-Hydroxyalkylferrocenes to Electrochemically Oxidized Poly(aniline)" J.Electroanal.Chem.,. (in press).

[Publications] Q.Chi: "Electrochemical Behavior and Surface Morphologic Changes of Copper Substracts in the Presence of 2,5-Dimercapto-1,3,4-thiadiazole Eelucidated by In Situ EQCM and Phase Measurement Interferometric Microscope" J.Electrochem.Soc.,. 145. 2369-2377 (1998)

[Publications] J.M.Pope: "Organosulfur/Conducting Polymer Composite Cathodes: I.Voltammetric Study of the Polymerization and Depolymerization of 2,5-Dimercapto-1,3,4-thiadiazole" J.Electrochem.Soc.,. 145. 1893-1901 (1998)

[Publications] H.Masuda: "Spatially Selective Metal Deposition into a Hole-Array Structure of Anodic Porous Alumina Using a Microelectrode" Jpn.J.Appl.Phys.,. 37(9A). 1090-1092 (1998)

[Publications] H.Masuda: "Self-Ordering of Cell Configuration of Anodic Porous Alumina with Large-Size Pores in Phosphoric Acid Solution" Jpn.J.Appl.Phys.,. 37(11A). 1340-1342 (1998)

[Publications] M.Watanabe: "Polymer Electrolyte Membranes Incorporated with Nanometer-Size Particles of Pt and/or Metal-Oxides, Experimental Analysis of Self-Humidification and Suppression of Gas-Crossover in Fuel Cells." J.Phys.Chem.B. 102(17). 3129-3137 (1998)

[Publications] M.Watanabe: "Analyses of Self-Humidification and Suppression of Gas-Crossover in Pt-Dispersed Polymer Electrolyte Membranes for Fuel Cells" J.Electrochem.Soc.,. 145(4). 1137-1141 (1998)

[Publications] H.Uchida: "Electrochemical Quartz Crystal Microbalance Study of Copper Ad-atoms on Au(111) Electrodes in Solutions of Perchloric and Sulfuric Acid" J.Electroanal.Cehm.,. 452. 97-106 (1998)

[Publications] T.Toda: "Role of Electronic Property of Pt and Pt-Alloys on Electrocatalytic Reduction of Oxygen" J.Electrochem.soc.,. 145(2). 4185-4188 (1998)

[Publications] T.Toda: "Enhancement of the Electrocatalytic O_2 Reduction on Pt-Fe Alloys" J.Electroanal.Chem.,. 460(1). 21-25 (1999)

米山宏大阪大学, 大学院・工学研究科, 教授 (80029082)

[Publications] 米山宏: "半導体ナノ粒子表面上での光誘起電子移動" 触媒. 40(7). 544-551 (1998)

[Publications] 米山宏: "コンポジット系正極材料" 工業材料. 47(2). 44-47 (1999)