期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 40, 期 36, 页码 12275-12285出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.05.199
关键词
MOP; Graphene oxide; Platinum; Hydrogen storage; Spillover
资金
- National Natural Science Foundation [51102119, 51272095]
- Natural Science Foundation of Jiangsu Province [BK2011518]
- Qing Lan Project of Jiangsu Province, the project of the Priority Academic Program Development of Jiangsu Higher Education Institutions, China Postdoctoral Science Foundation [2014M561578]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1401109C]
Pt nanoparticles (NPs) have been immobilized on the support of nanoscale zeolitic imidazolate framework (ZIF-8) and graphene oxide (GO) via a facile liquid impregnation method, in which H(2)PtC1(6), NaBH4 and polyvinyl alcohol (PVA) act as the Pt precursor, reducing and stabilizing agents, respectively. The resulting Pt@ZIF-8/GO composite was characterized by powder X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, inductively coupled plasma emission spectroscopy, energy dispersive spectroscopy and N-2 adsorption-desorption analysis. The results showed that Pt metal catalysts with an average size of 3.8 nm were highly dispersed and anchored tightly on the external surface of the ZIF-8/GO support. The hydrogen storage performance of Pt@ZIF-8/GO was investigated. The hydrogen storage capacity of Pt@ZIF-8/GO at 298 K and 10.0 bar is 2.2 times higher than that of the parent ZIF-8. The enhanced hydrogen storage capacity is mainly attributed to the hydrogen spillover mechanism involved in such catalytic systems. The high dispersion and small size of Pt NPs, as well as intimate contacts between the Pt dissociation source and ZIF-8/GO receptor are crucial to achieving such an obvious increase in room-temperature hydrogen storage capacity. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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