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Graphitic Carbon Nanofiber Growth from Catalytic-Metal Organic Frameworks & their Electrochemical Double Layer Properties

Abstract

Metal organic frameworks have been widely studied as a template to nanoporous or well-structured carbon materials; however, utilizing the catalytic property of MOFs to grow graphitic one dimensional nanostructures have been curiously little. We have studied the evolution of carbon structures produced by transition metal doping (Ni in our case) in a Zn-based MOF and subjecting the MOF to a typical chemical vapour deposition process. Structures ranging from fine to thick graphitized carbon nanofibers are produced systematically at relatively low temperature of 650 °C by increasing the Ni concentration in the MOF. A general trend of increase in nanofiber diameter with increase in Ni concentration and formation of plate-like graphitic structures suggest that the catalyst particles undergo coalescence and impact the morphology of carbon structures produced. Without any further modification, the carbon nanofibers show modest electrical double layer (18 F/g) behaviour in 1 M Na2SO4, but quite interestingly, the finely divided Ni particles undergo Faradaic redox reactions in 1 M KOH and boosts the capacitance to 348 F/g. Our work suggest that our approach of utilizing catalytic MOFs for growth of well-defined carbon nanostructures can serve more than one purpose towards synthesis of hybrid materials for energy storage.

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Publication details

The article was received on 29 Jul 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA06665A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Graphitic Carbon Nanofiber Growth from Catalytic-Metal Organic Frameworks & their Electrochemical Double Layer Properties

    P. CHAKRABORTY BANERJEE, D. E. Lobo, T. Williams, M. Shaibani, M. R. Hill and M. Majumder, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06665A

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