TY - JOUR
T1 - Silane-based hydrogen storage materials for fuel cell application
T2 - Hydrogen release via methanolysis and regeneration by hydride reduction from organosilanes
AU - Han, Won Sik
AU - Kim, Tae Jin
AU - Kim, Sung Kwan
AU - Kim, Yongmin
AU - Kim, Yeongcheon
AU - Nam, Suk Woo
AU - Kang, Sang Ook
N1 - Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. 2011-0018595) and the Korea Institute of Science and Technology.
PY - 2011/9
Y1 - 2011/9
N2 - A series of cyclic- and linear organosilanes, 1-5, was prepared and examined as potential hydrogen storage materials. When a stoichiometric amount of methanol was added to a mixture of cyclic organosilane, (CH 2SiH2)3 (1) or (CH2SiH 2CHSiH3)2 (2), and 5 mol% NaOMe, rapid hydrogen release was observed at room temperature within 10-15 s. The hydrogen storage capacities of compounds 1 and 2 were estimated to be 3.70 and 4.04 wt.-% H 2, respectively. However, to ensure the complete methanolysis from organosilanes including methanol evaporation at exothermic dehydrogenation condition, two equivs of methanol were used. The resulting methoxysilanes, (CH2Si(OMe)2)3 (6) and (CH2Si(OMe) 2CHSi(OMe)3)2 (7), were regenerated to the starting organosilanes in high yields by LiAlH4 reduction. Linear organosilanes, SiH3CH2SiH2CH 2SiH3 (3), SiH3CH2CH(SiH 3)2 (4), and SiH3CH2CH(SiH 3)CH2SiH3 (5) also showed fast hydrogen release kinetics at room temperature with hydrogen storage capacities of 4.26, 4.55, and 4.27 wt.% H2, respectively; the corresponding methoxysilanes were successfully regenerated by LiAlH4. Compound 1 was further tested as hydrogen source for fuel cell operation.
AB - A series of cyclic- and linear organosilanes, 1-5, was prepared and examined as potential hydrogen storage materials. When a stoichiometric amount of methanol was added to a mixture of cyclic organosilane, (CH 2SiH2)3 (1) or (CH2SiH 2CHSiH3)2 (2), and 5 mol% NaOMe, rapid hydrogen release was observed at room temperature within 10-15 s. The hydrogen storage capacities of compounds 1 and 2 were estimated to be 3.70 and 4.04 wt.-% H 2, respectively. However, to ensure the complete methanolysis from organosilanes including methanol evaporation at exothermic dehydrogenation condition, two equivs of methanol were used. The resulting methoxysilanes, (CH2Si(OMe)2)3 (6) and (CH2Si(OMe) 2CHSi(OMe)3)2 (7), were regenerated to the starting organosilanes in high yields by LiAlH4 reduction. Linear organosilanes, SiH3CH2SiH2CH 2SiH3 (3), SiH3CH2CH(SiH 3)2 (4), and SiH3CH2CH(SiH 3)CH2SiH3 (5) also showed fast hydrogen release kinetics at room temperature with hydrogen storage capacities of 4.26, 4.55, and 4.27 wt.% H2, respectively; the corresponding methoxysilanes were successfully regenerated by LiAlH4. Compound 1 was further tested as hydrogen source for fuel cell operation.
KW - Hydrogen storage material
KW - Hydrosilane
KW - PEMFC
KW - Regeneration
UR - http://www.scopus.com/inward/record.url?scp=80052796441&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2011.06.118
DO - 10.1016/j.ijhydene.2011.06.118
M3 - Article
AN - SCOPUS:80052796441
VL - 36
SP - 12305
EP - 12312
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 19
ER -
