121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-322
Subject Electrochemical hydrogen storage performance of cobalt metal grafted mesoporous graphene
Authors Myeongdeok Seo, Aran Kim, Hyun Jung*
Department of Chemistry, Dongguk University, Korea
Abstract We successfully synthesize the cobalt metal grafted mesoporous graphene composites (Co-MGs) by simple deposition reaction of dicobalt octacarbonyl (DCO) on the pore of mesoporous graphene. The host materials MG was synthesized by soft-template method with graphite oxide and triblock copolymer (Pluronic P-123) and dispersed in toluene. For cobalt metal grafting, DCO powder was added to MG toluene suspension and refluxed at 110℃ under nitrogen atmosphere. To find the optimal conditions for the hydrogen storage behavior, we systematically synthesized various molar ratios of cobalt and carbon, and measured their hydrogen storage performance. The structural characteristics of the Co-MGs were measured by X-ray diffraction (XRD) measurement and morphology of the products examined by field emission scanning electron microscopy (FE-SEM) and high resolution transmission electron microscopy (HR-TEM). The specific surface area and pore size distribution of products were measured by N2 adsorption-desorption measurement. The amount of cobalt in Co-MGs was investigated by thermal gravimetric analysis (TGA) and energy dispersive spectrometry (EDS). Additionally, hydrogen storage performances of obtained samples were measured by cyclic voltammetry and galvanostatic charge-discharge tests in a three-electrode system with 6M KOH solution.
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