Surfactant free RGO/Pd nanocomposites as highly active heterogeneous catalysts for the hydrolytic dehydrogenation of ammonia borane for chemical hydrogen storage.
In this study, monodisperse palladium (Pd) nanoparticles on reduced graphene oxide (RGO) surfaces were successfully prepared by a "wet" and "clean" method in aqueous solution. Without any surface treatment, Pd nanoparticles are firmly attached to the RGO sheets. These RGO/Pd nanocomposites exhibited catalytic activity in hydrogen generation from the hydrolysis of ammonia borane (AB). Their hydrolysis completion time and activation energy were 12.5 min and 51 ± 1 kJ mol(-1), respectively, which were comparable to the best Pd-based catalyst reported. The TOF values (mol of H(2)× (mol of catalyst × min)(-1)) of RGO/Pd is 6.25, which appears to be one of the best catalysts reported so far. We also obtained a (11)B NMR spectrum to investigate the mechanism of this catalytic hydrolysis process. This simple and straightforward method is of significance for the facile preparation of metal nanocatalysts with high catalytic activity on proper supporting materials.
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and Colleague of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. xipx@lzu.edu.cn
Pinxian
P
Xi
Fengjuan
F
Chen
Guoqiang
G
Xie
Cai
C
Ma
Hongyan
H
Liu
Changwei
C
Shao
Jun
J
Wang
Zhihong
Z
Xu
Ximing
X
Xu
Zhengzhi
Z
Zeng
D000641:Ammonia / Q000737:chemistry; D001880:Boranes / Q000737:chemistry*; D002384:Catalysis; D006108:Graphite / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D006868:Hydrolysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry
D001880:Boranes; D010087:Oxides; D013501:Surface-Active Agents; D010165:Palladium; D000641:Ammonia; D006108:Graphite; D006859:Hydrogen