Improvement in Efficiency of Dinitrogen Fixation Using Conducting Polymer/Titanium Oxide Junction System

使用导电聚合物/氧化钛连接系统提高二氮固定效率

• 批准号: 15350092
• 负责人: HOSHINO Katsuyoshi
• 金额: $ 6.02万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15350092/
• 关键词: Nitrogen Fixation; Titanium Oxide; Organic; Inorganic Junction; Inorganic Interface; Oxygen Vacancy; Conducting Polymer; Anodic Oxidation; Chemical Bond Formation

Nitrogen fixation systems driven by white light under mild conditions was investigated. The typical system consists of titanium oxide(TiOx) and poly(3-methylthiophene)(P3MeT), and their heterojunction is previously shown to produce ammonium salt crystals (NH_4ClO_4) when exposed to white light in air at 20℃ and 40%RH. The aims of this study have been directed to the collection of experimental data which would allow us to elucidate the fixation mechanism and to the investigation of material conditions for increasing the fixation rate and the fixation yield.First, the mechanistic study was performed by the chemical and physical approaches. The former approach revealed that the fixation process consists of the formation of ammonia at the junction interface and its conversion to ammonium salt in the polymer bulk. The latter approach gave the data suggesting that the oxygen vacancy on the titanium oxide surface plays the role of a site for the adsorption, activation, and reduction of dinitrogen.Secondly, we investigated the material conditions to affect the fixation yield and the fixation rate. The results indicated that the use of polycarbazole films leads to the enhancement in the fixation yield and that the use of titanium oxide prepared electrochemically in aqueous phosphoric acid increases the fixation rate. The former improvement was explained by the high concentration of dopant anion species in the polycarbazole (i.e., high doping density), and the latter by the high density of oxygen deficiency on the titanium oxide surface synthesized in phosphoric acid.

研究了在温和条件下白光驱动的固氮系统。典型的体系由二氧化钛(TiOx)和聚(3-甲基噻吩基)(P3MeT)组成，它们的异质结在20℃和40%RH的白光照射下会生成铵盐晶体(NH_4ClO_4)。这项研究的目的是收集实验数据，以便我们能够阐明固定机理，并探索提高固定率和固定率的物质条件。首先，通过化学和物理方法进行机理研究。前者揭示了固定过程包括在结界面处形成氨并将其转化为聚合物本体中的铵盐。后一种方法提供的数据表明，二氧化钛表面的氧空位对二氮的吸附、活化和还原起到了作用。其次，我们考察了材料条件对固色率和固色率的影响。结果表明，使用聚咔唑膜可以提高固色率，而在磷酸水溶液中使用电化学法制备的氧化钛可以提高固色率。前者的改善是由于聚咔唑中掺杂阴离子的浓度较高(即高掺杂浓度)，而后者则是由于磷酸合成的二氧化钛表面存在高密度的氧缺位。

项目成果

Characterization and malarial conditions of conducting polymer/titanium oxide hybrid systems used for dinitrogen fixation under ordinary pressure and temperature

常压常温下用于固氮的导电聚合物/二氧化钛杂化体系的表征和疟疾条件

• 发表时间: 2004
• 期刊: Electrochemistry Communications 6
• 作者: T.Kato;M.Yoshio;Tomohisa Ogawa
• 通讯作者: Tomohisa Ogawa

Nitrogen Fixation as the Future Energy Conversion Process

固氮作为未来的能源转换过程

• 发表时间: 2004
• 期刊: Chemical Engineering 49-1
• 作者: Dang Duc Vuong et al.;Tomohisa Ogawa;T.Ohkuma;Zheng-Yu Wang et al.;S.Yamada et al.;U.-Sung Choi et al.;Zheng-Yu Wang et al.;T.Ohkuma;Katsuyoshi Hoshino
• 通讯作者: Katsuyoshi Hoshino

無機/高分子ナノ界面制御

无机/聚合物纳米界面控制

• 发表时间: 2004
• 作者: Aki Inase;Aki Inase;Aki Inase;Miho Higurashi;Miho Higurashi;Miho Higurashi;山田 淳;Shunji Abe et al.;Tomohisa Ogawa;N.Terasaki et al.;T.Ohkuma;Ana M.Ruiz et al.;T.Ohkuma;N.Terasaki et al.;Masahiro Kugishima et al.;Tomohisa Ogawa;M.Suzuki et al.;Katsuyoshi Hoshino;Noboru Yamazoe;T.Ohkuma;S.Yamada et al.;星野 勝義
• 通讯作者: 星野 勝義

チタン陽極酸化膜/導電性ポリマー接合の界面電気物性

钛阳极氧化膜/导电聚合物键合界面电学性能

• 发表时间: 2004
• 期刊: 表面科学 25・7
• 作者: A.M.Ruiz et al.;小川 智央
• 通讯作者: 小川 智央

Tomohisa Ogawa: "Characterization and material conditions of conducting polymer/titanium oxide hybrid systems used for dinitrogen fixation under ordinary pressure and temperature"Electrochemistry Communications. 6巻. 55-60 (2004)

Tomohisa Okawa：“常压和常温下用于二氮固定的导电聚合物/氧化钛混合系统的特性和材料条件”，电化学通讯，第 6 卷，55-60 (2004)。