Room-Temperature Hydrogen Uptake by TiO2 Nanotubes
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- 作者：San Hua Lim ; Jizhong Luo ; Ziyi Zhong ; Wei Ji ; and Jianyi Lin
- 刊名：Inorganic Chemistry
- 出版年：2005
- 出版时间：June 13, 2005
- 年：2005
- 卷：44
- 期：12
- 页码：4124 - 4126
- 全文大小：258K
- 年卷期：v.44,no.12(June 13, 2005)
- ISSN：1520-510X
文摘
TiO2 nanotubes can reproducibly store up to ~2 wt % H2 at roomtemperature and 6 MPa. However, only about 75% of this storedhydrogen can be released when the hydrogen pressure is loweredto ambient conditions, suggesting that both physisorption andchemisorption are responsible for the hydrogen uptake. FTIRspectroscopy, temperature-programmed desorption (TPD), andpressure-composition (P-C) isotherms suggest that 75% of theH2 is physisorbed and can be reversibly released upon pressurereduction. Approximately 13% is weakly chemisorbed and can bereleased at 70 
C as H2, and ~12% is bonded to oxide ions andreleased only at temperatures above 120 C as H2O.
C as H2, and ~12% is bonded to oxide ions andreleased only at temperatures above 120 C as H2O.