Ni-B-doped NaAlH4 hydrogen storage materials prepared by a facile two-step synthesis method

作者：Li, Wen-Bin; Li, Li; Ren, Qiu-Li; Wang, Yi-Jing^*; Jiao, Li-Fang; Yuan, Hua-Tang

来源：Rare Metals, 2015, 34(9): 679-682.

DOI：10.1007/s12598-013-0121-2

• NaAlH4
• Hydrogen storage
• Ni-B catalyst
• Dehydrogenation kinetics

By directly introducing Ni-B into NaAlH4 system using a facile two-step synthesis method, the effects of Ni-B on NaAlH4 were systematically investigated. NaAlH4 can be completely formed after 30 h milling under 1 MPa hydrogen pressure. In addition, the dehydrogenation kinetics of as-prepared NaAlH4 after different milling times were investigated. As the dehydrogenation temperature rises, both the hydrogen desorption capacity and dehydrogenation rate quickly increase. The apparent activation energy E (a) for Ni-B-doped NaAlH4 is calculated to be 61.91 kJ center dot mol(-1) for the first dehydrogenation step. More importantly, the dehydrogenation temperature of as-prepared NaAlH4 nanocrystalline can be reduced to about 100 A degrees C.

• 出版日期2015-9
• 单位南开大学