Structural control and applications of carbon nanowalls

碳纳米墙的结构控制及应用

• 批准号: 21560691
• 负责人: TACHIBANA Masaru
• 金额: $ 3.08万
• 依托单位: Yokohama City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21560691/
• 关键词: ナノ物性; カーボン材料; カーボンナノウォール; 燃料電池; プラズマCVD; 白金担持; 白金代替触媒; ドメイン構造; グラファイト; ナノダイヤモンド; ナノグラファイト; リチウムイオン二次電池

We obtained main three results as mentioned below.(1) The growth process of CNWs was investigated. It was found that the preferred orientation of graphene layers constituting carbon nanowalls(CNWs) is perpendicular to the substrate surface. It should be noted that, before the vertical growth, the graphene layers are horizontally oriented. Furthermore, it was found that nanodiamond particles are formed over the substrate at the initial growth stage. Such understanding of the interface layers between the substrate and CNWs will be useful for not only the growth control but also device applications.(2) The physical and chemical properties such as transport properties and hydrogen absorption were investigated. It was found that CNWs exhibit Anderson weak localization which can be explained from domain structure of CNW. The hydrogen absorption properties at domain boundary and terrace of CNWs were characterized by quantum chemical calculation.(3) Platinum catalysts supported on carbon nanowalls(Pt/CNW) were prepared by a solution-reduction method. It was found that Pt nanoparticles with a mean diameter of 3.5 nm are well dispersed along domain boundaries in each CNW. In addition, it was shown that the Pt/CNW has high electrochemical active surface area and utilization, comparable to those for commercially available T? Pt/CB with good performance. Such high electrocatalytic activity could be attributed to the high electric conductivity of CNW and the improvement of electronic properties of Pt nanoparticles on the domain boundaries, in addition to the high dispersion of Pt particles.

（1）研究了CNW的生长过程。发现构成碳纳米瓦（CNWS）的石墨烯层的首选方向垂直于底物表面。应当指出的是，在垂直生长之前，石墨烯层是水平的。此外，发现在初始生长阶段在基板上形成了纳米座颗粒。对底物和CNW之间界面层的这种理解不仅对生长控制，而且对设备应用也很有用。（2）研究了物理和化学性质，例如运输特性和氢化的吸收。发现CNWS展示了Anderson弱位置，可以从CNW的域结构中解释。通过量子化学计算，在域边界和CNW的露台上的氢吸收特性。（3）通过溶液还原方法制备了支撑在碳纳米瓦（PT/CNW）上的铂催化剂（PT/CNW）。发现平均直径为3.5 nm的Pt纳米颗粒沿每个CNW的域边界很好地分散。此外，还表明PT/CNW具有高电化学活性表面积和利用率，可与市售t相当。 PT/CB表现良好。这种高的电催化活性可以归因于CNW的高电导率以及PT纳米颗粒在域边界上的电子性质的改善，除了PT颗粒的高分散外。

项目成果

Grazing incidence x-ray diffraction study on carbon nanowalls

碳纳米墙掠入射 X 射线衍射研究

• 发表时间: 2009
• 期刊: Chem. Phys. Lett
• 作者: Hirofumi Yoshimura ; Shigeki Yamada ; Akihiko Yoshimura ; Ichiro Hirosawa ; Kenichi Kojima;Masaru Tachibana
• 通讯作者: Masaru Tachibana

カーボンナノウォールの高速充放電リチウムイオン二次電池負極材への応用

碳纳米墙在高速充放电锂离子二次电池负极材料中的应用

• 发表时间: 2009
• 期刊: NEW DIAMOND
• 作者: 橘勝;棚池修
• 通讯作者: 棚池修

Structural features of Carbon Nanowalls and their Potential Applications in Energy Devices

碳纳米墙的结构特征及其在能源器件中的潜在应用

• 发表时间: 2012
• 作者: Kazuto Arakawa;Takafumi Amino;Hirotaro Mori;Masaru Tachibana
• 通讯作者: Masaru Tachibana

The initial growth process of carbon nanowalls synthesized by dc-PECVD method

dc-PECVD法合成碳纳米墙的初始生长过程

• 发表时间: 2010
• 作者: H. Yoshimura;A. Yoshimura;M. Tachibana
• 通讯作者: M. Tachibana

カーボンナノウォールの磁性

碳纳米墙的磁性

• 发表时间: 2010
• 作者: 山田重樹;吉村博史;額田一利;橘勝
• 通讯作者: 橘勝