Room-temperature hydrogen uptake by TiO ₂ nanotubes

TY - JOUR

T1 - Room-temperature hydrogen uptake by TiO 2 nanotubes

AU - Lim, San Hua

AU - Luo, Jizhong

AU - Zhong, Ziyi

AU - Ji, Wei

AU - Lin, Jianyi

PY - 2005/6/13

Y1 - 2005/6/13

N2 - TiO 2 nanotubes can reproducibly store up to∼2 wt% H 2 at room temperature and 6 MPa. However, only about 75% of this stored hydrogen can be released when the hydrogen pressure is lowered to ambient conditions, suggesting that both physisorption and chemisorption are responsible for the hydrogen uptake. FTIR spectroscopy, temperature-programmed desorption (TPD), and pressure-composition (P-C) isotherms suggest that 75% of the H 2 is physisorbed and can be reversibly released upon pressure reduction. Approximately 13% is weakly chemisorbed and can be released at 70°C as H 2, and ∼ 12% is bonded to oxide ions and released only at temperatures above 120°C as H 2O.

AB - TiO 2 nanotubes can reproducibly store up to∼2 wt% H 2 at room temperature and 6 MPa. However, only about 75% of this stored hydrogen can be released when the hydrogen pressure is lowered to ambient conditions, suggesting that both physisorption and chemisorption are responsible for the hydrogen uptake. FTIR spectroscopy, temperature-programmed desorption (TPD), and pressure-composition (P-C) isotherms suggest that 75% of the H 2 is physisorbed and can be reversibly released upon pressure reduction. Approximately 13% is weakly chemisorbed and can be released at 70°C as H 2, and ∼ 12% is bonded to oxide ions and released only at temperatures above 120°C as H 2O.

UR - http://www.scopus.com/inward/record.url?scp=20744432462&partnerID=8YFLogxK

U2 - 10.1021/ic0501723

DO - 10.1021/ic0501723

M3 - 文章

C2 - 15934734

AN - SCOPUS:20744432462

SN - 0020-1669

VL - 44

SP - 4124

EP - 4126

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 12

ER -