期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 6, 期 10, 页码 3443-3448出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cy01756d
关键词
-
资金
- National NSFC [51371100, 51271094]
- Tianjin High-Tech [13SJCZDJC26500, 12JCQNJC03900]
Cobalt-based materials are promising catalysts for hydrolysis of ammonia borane. However, the stability of such catalysts is still a challenge for their application. We here report the one-step synthesis of Co nanoparticles embedded in porous N-doped carbon (denoted as Co@N-C) and their enhanced catalytic stability for hydrolysis of ammonia borane. The Co@N-C catalysts are fabricated through one-step thermolysis of Co(salen) at selected temperatures (600-800 degrees C) under an Ar atmosphere. It is found that among the catalysts in this study, the Co@N-C nanocomposite obtained at 700 degrees C (Co@N-C-700) shows superior catalytic activity and high sustainability. The turnover frequency (TOF) and activation energy of Co@N-C-700 for the hydrolysis of ammonia borane are 5.6 mol(H2) molCo(-1) min(-1) and 31.0 kJ mol(-1), respectively. In particular, this catalyst retains 97.2% of its initial catalytic activity after 10 cycles. The remakable catalytic activity and durability of Co@N-C-700 are attributed to the high dispersion of the Co nanoparticles in the porous N-doped carbon. This would provide insights into the enhancement of the cycling utilization of the Co@N-C-700 nanocomposite for catalytic hydrolysis of ammonia borane.
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