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-351
Subject Nitrogen-doped 3D Microporous Carbon Synthesized Using Zeolite as a Template for Oxygen Reduction Electrocatalysis
Authors Seung Won Han, Ryong Ryoo*
Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Korea
Abstract Heteroatom-doped porous carbons having ordered porosity have gained increasing attention as an efficient and cost-effective material for energy conversion and storage applications, such as fuel cells, supercapacitors, and batteries. In addition to the improvement of electrochemical properties from the heteroatom doping effect, the porous nature of the carbon materials has shown following benefits: increased number of accessible active sites and easier diffusion of molecules through the material. For these reasons, recent attention has been directed to the synthesis of heteroatom doped porous carbons with high surface area and ordered porous structure on account of synergistic combination of its structural features and modified electronic properties. In this work, we present the synthesis of nitrogen-doped 3D microporous carbon using zeolite as a hard template and various nitrogen containing carbon precursors. The synthesis was performed with an aid of Ca2+ ion catalysts embedded inside the zeolite framework, following the recently reported catalytic synthesis approach from our group. The carbon product had large surface area of > 2000 m2g-1, large pore volume of > 1.0cm3g-1, uniform micropores, and high content of nitrogen. The changes in the amount of nitrogen doped in the carbon and nitrogen bonding configurations in the framework according to synthesis temperature are presented. Furthermore, we report the performances of nitrogen-doped zeolite-templated carbons as an electrochemical oxygen reduction catalyst. In particular, oxygen reduction behavior in terms of chemical state of nitrogen and porous texture of the carbon is discussed.
E-mail seungwonhan@kaist.ac.kr