A stable and efficient 3D cobalt-graphene composite catalyst for the hydrolysis of ammonia borane

作者：Li, Mengxiong; Hu, Jiantong; Lu, Hongbin^*

来源：Catalysis Science & Technology, 2016, 6(19): 7186-7192.

DOI：10.1039/c6cy01253a

• CORE-SHELL NANOPARTICLES
• HYDROGEN GENERATION
• SYNERGETIC CATALYSIS
• METHYLAMINE BORANE
• SIO2 NANOSPHERES
• NI NANOPARTICLES
• DEHYDROGENATION
• CARBON
• OXIDE
• DEPOSITION

Low-cost, stable and highly efficient catalysts are essential for practical energy applications. In this study, branched polyethylenimine (PEI)-decorated graphene oxide (GO) 3D structures were prepared through a hydrothermal reaction. Cobalt (Co) nanoparticles (NPs) were deposited on the PEI-GO 3D structures, forming the desired, low-cost composite catalyst PEI-GO(3D)/Co. The catalyst shows a quite high catalytic activity for the room temperature hydrolysis of ammonia borane, with a turnover frequency of 18.5 mol(H2) min(-1) mol(Co)(-1) and a hydrogen generation rate of 7.68 LH2 min(-1) gCo (-1). The activation energy of the catalyst is relatively low (27.41 kJ mol(-1)), along with an ultrahigh cycle stability, that is, similar to 83% of the initial catalytic activity was retained after 5 catalytic cycles, superior to the majority of non-noble metal catalysts.

• 出版日期2016
• 单位聚合物分子工程国家重点实验室; 复旦大学