CuCo nanoparticles supported on hierarchically porous carbon as catalysts for hydrolysis of ammonia borane
CuCo nanoparticles supported on hierarchically porous carbon as catalysts for hydrolysis of ammonia borane
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分级多孔碳负载 CuCo 纳米颗粒作为氨硼烷水解催化剂
DOI：
10.1016/j.jallcom.2015.08.139
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发表时间：
2015-12-05
影响因子：
6.2
通讯作者：
Chen, Jun
中科院分区：
文献类型：
--
作者：
Wang, Haixia;Zhou, Limin;Chen, Jun
报道了层状多孔碳(HPC)负载Cu0.2Co0.8纳米粒子(NPs)的合成及其对氨水解硼烷的催化活性。用NaBH4和NaOH水溶液化学还原法制备了Cu0.2Co0.8/HPC催化剂。结果表明，Cu0.2Co0.8纳米粒子(约8 nm)均匀地固定在高性能混凝土上，具有相互连通的多孔结构，总孔容为0.2807 cm(3)g(-1)，高比表面积为600m(2)g(-1)。此外，HPC的大比表面积和多孔结构有利于限制Cu0.2Co0.8纳米粒子的迁移，提高Cu0.2Co0.8的负载量。在所制备的Cu0.2Co0.8/HPC样品中，含32.3wt%Cu0.2Co0.8纳米粒子的Cu0.2Co0.8/HPC具有最好的催化活性，其最大产氢速率为2960mLmin(-1)g(-1)，活化能为41.7kJmol(-1)。Cu0.2Co0.8/HPC催化剂具有较强的催化性能和良好的循环利用能力，在储氢领域具有广阔的应用前景。(C)2015爱思唯尔B.V.保留所有权利。
We report on the synthesis of Cu0.2Co0.8 nanoparticles (NPs) supported on hierarchically porous carbon (HPC) and their catalytic activities for the hydrolysis of ammonia borane. Cu0.2Co0.8/HPC catalysts have been prepared by chemical reduction with aqueous solution of NaBH4 and NaOH. The results show that Cu0.2Co0.8 NPs (similar to 8 nm) are homogeneously anchored on HPC with an interconnected porous architecture, which shows a total pore volume of 0.2807 cm(3) g(-1) and a high surface area of 600 m(2) g(-1). Furthermore, the large surface area and porous architecture of HPC are beneficial to limit the migration of Cu0.2Co0.8 NPs and enhance the loading contents of Cu0.2Co0.8. Among the as-prepared Cu0.2Co0.8/HPC samples, Cu0.2Co0.8/HPC with 32.3 wt% Cu0.2Co0.8 NPs exhibits the best catalytic activity, displaying a max hydrogen generation rate of 2960 mL min(-1) g(-1) and an activation energy of 41.7 kJ mol(-1). With enchanced catalytic abilities and good recycling ability, Cu0.2Co0.8/HPC catalysts could be promisingly employed in hydrogen storage. (C) 2015 Elsevier B.V. All rights reserved.