A facile two-step synthesis and dehydrogenation properties of NaAlH4 catalyzed with Co-B

作者：Wang, Yaping; Ren, Qiuli; Wang, Yijing^*; Li, Li; Song, Dawei; Jiao, Lifang; Yuan, Huatang

来源：International Journal of Hydrogen Energy, 2010, 35(20): 11004-11008.

DOI：10.1016/j.ijhydene.2010.07.101

• NaAlH4
• Co-B catalyst
• Dehydrogenation kinetics
• Formation mechanism

Co-B doped NaAlH4 is successfully synthesized by two-step synthesis process. The first activation step is milling NaH/Al powder and Co-B mixtures under Ar atmosphere. The second step is milling in a lower hydrogen pressure atmosphere. XRD patterns and FTIR spectrum demonstrate that NaAlH4 is completely formed after 15 h milling in Ar atmosphere following by 40 h milling in 2 MPa H-2 atmosphere. PCT curves of as-prepared NaAlH4 show that it can release hydrogen at a low temperature of 90 degrees C. The activation energy value calculated by Arrhenius equation is only 67.95 kJ mol(-1). Moreover, the formation mechanism of NaAlH4 is also discussed.

• 出版日期2010-10
• 单位南开大学