奈米碳材的材料特性對其儲氫量之影響研究

Physicochemical Properties of Nano-sized Carbon Materials Affecting the Hydrogen Storage Performance

10.6409/JMSE.200612.0213

林冠宇(K.Y. Lin)；蔡恆毅(H.Y. Tsai)；張仍奎(J.K. Chang)；余明昇(M.S. Yu)；楊聰仁(T.J. Yang)；蔡文達(W.T. Tsai)

奈米碳管 ； 儲氫材料 ； 吸放氫性能 ； 高壓TGA ； nano-sized carbon material ； hydrogen storage material ； hydrogen adsorption/desorption ； high pressure TGA

材料科學與工程

38卷4期（2006 / 12 / 01）

213 - 218

繁體中文

本研究以金屬塵化反應後所產生之奈米級碳材爲探討對象，嘗試瞭解各種材料特性對其儲氫能力的影響。實驗中利用SEM及TEM對奈米級碳材的形貌與結晶性進行觀察、以物理氣相吸附儀量測其比表面積、以拉曼光譜儀分析其微結構，並以X光吸收光譜技術分析其表面所鍵結的官能基。而在奈米碳材儲氫特性方面，則利用高壓TGA加以評估。實驗結果顯示管狀奈米碳材的儲氫量遠高於纖維狀者；而高結晶性、高表面積且均勻的管徑對奈米碳管的儲氫量有正面提升的效果。另外，碳材表面吸附異種官能基的多寡，對其儲氫量有相當重要的影響。

The nano-sized carbon materials (NCMs) in this study were produced during the metal dusting process. The relationship between material characteristics and the hydrogen storage performance was investigated. Morphology and crystallinity of the NCMs were observed with a scanning electron microscope and a transmission microscope. Moreover, the specific surface area, microstructure, and surface functional groups of the NCMs were examined by a surface area analyzer, a Raman spectrometer, and an X-ray absorption spectroscope, respectively. In addition, a high pressure thermal gravity analyzer was employed to measure the hydrogen storage capacity of the NCMs. The experimental results indicated that the reaction atmosphere and temperature significantly affected material characteristics of the obtained NCMs and thereby their hydrogen storage performance. The NCMs had a tubular structure with a high degree of crystallinity and high surface area were confirmed to possess superior hydrogen storage capability. It was also found that the more the surface functional groups existed the less amount of hydrogen could be adsorbed on the NCMs.