Royal Society of Chemistry;Royal Society of Chemistry (RSC)
摘要:
摘要： 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 CoN-C) and their enhanced catalytic stability for hydrolysis of ammonia borane. The CoN-C catalysts are fabricated through one-step thermolysis of Co(salen) at selected temperatures (600-800 °C) under an Ar atmosphere. It is found that among the catalysts in this study, the CoN-C nanocomposite obtained at 700 °C (CoN-C-700) shows superior catalytic activity and high sustainability. The turnover frequency (TOF) and activation energy of CoN-C-700 for the hydrolysis of ammonia borane are 5.6 mol H 2 mol Co −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 CoN-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 CoN-C-700 nanocomposite for catalytic hydrolysis of ammonia borane. Cobalt nanoparticles uniformly embedded in porous N-doped carbon prepared through the thermal decomposition of Co(salen) are promising catalysts for hydrolysis of ammonia borane. 出版者： Royal Society of Chemistry (RSC) 出版日期： 2016-01-01 出處： Catalysis Science & Technology, 2016-01, Vol.6 (10), p.3443-3448 資源來源： Royal Society of Chemistry 識別號： ISSN: 2044-4753 識別號： EISSN: 2044-4761 識別號： DOI: 10.1039/c5cy01756d
