Porously Hierarchical Cu@Ni Cubic-cage Microstructure: Fabrication and Catalytic Hydrolysis for Ammonia Borane to Release H2 Gas
作者单位：Chemical Engineering and Pharmaceutics School Henan University of Science and Technology
会议名称：《河南省化学会2016年学术年会》
会议日期：2016年
学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术]
关 键 词：Copper nickel bimetal Cubic-cage microstructure Ammonia borane Catalytic hydrolysis
摘 要：Ammonia borane(AB) is a complex hydride that has the highest gravimetric hydrogen capacity ever discovered by now. Ammonia borane can controllably liberate hydrogen gas via hydrolysis or alcoholysis route by means of suitable catalyst, Some non-noble metals have been testified to have a certain level of catalytic activity for hydrolysis or alcoholysis of Ammonia borane. Therefore, it is reasonable for us to expect the emergence of inexpensive and efficient catalysts constituted by both the noble metals and non-noble metals,which certainly deserves in-depth study. By using alcohol-soluble salt of non-noble metal Cu and Ni as starting materials, a series of CuNi, CuNi, CuNi, CuNi, CuNi and CuNi bi/mono-metal catalysts have been fabricated by an one-step solvothermal reduction route. The morphology, phase makeup and chemical states of superficial elements of the catalyst were systematically analyzed respectively. The catalytic activity of the catalysts was minutely evaluated by means of the hydrolytic hydrogen release of ammonia borane under various conditions. The research results show that the as-synthesized products appear as porously hierarchical cubic-cage microstructure, having the larger specific areas. The existence of charge transfer from Cu to Ni gives rise to synergistic effect between Cu and Ni component, thus endowing the bimetal catalysts with better catalytic performance. The catalyst CuNi with the highest catalytic activity can entirely release H in 8 minutes, and has excellent stability catalytic activity after reusing for 5 times.