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.

我们得到了以下三个主要结果。(1)研究了碳纳米线的生长过程。结果发现，构成碳纳米管（CNW）的石墨烯层的优选取向是垂直于衬底表面。应当注意，在垂直生长之前，石墨烯层是水平取向的。此外，发现纳米金刚石颗粒在初始生长阶段形成在衬底上。这种对衬底和碳纳米线之间界面层的理解不仅对生长控制而且对器件应用都是有用的。(2)研究了其传输性能和吸氢性能等物理化学性质。发现碳纳米线具有安德森弱局域化，这可以从碳纳米线的畴结构来解释。通过量子化学计算对碳纳米线畴界和平台处的吸氢性能进行了表征。(3)采用溶液还原法制备了碳球负载铂催化剂（Pt/CNW）。结果发现，Pt纳米粒子的平均直径为3.5 nm的是很好地分散沿着域边界在每个CNW。此外，它表明，Pt/CNW具有高的电化学活性表面积和利用率，可与那些市售的T？Pt/CB具有良好的性能。这种高的电催化活性可以归因于CNW的高电导率和Pt纳米颗粒在畴界上的电子性质的改善，以及Pt颗粒的高分散性。

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