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학술발표회초록보기

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제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Chemical structures and electrocatalytic performances of heteroatom-containing functionalities in N-doped reduced graphene oxides

등록일
2016년 8월 30일 14시 29분 05초
접수번호
2162
발표코드
MAT.P-611 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 14일 (금요일) 11:00~12:30
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
심연준, 오정훈, 박성진*
인하대학교 화학과, Korea
N-doped graphene-based materials are excellent promising metal-free electrocatalysts for the oxygen reduction reaction (ORR). Because the N-doped graphene-based materials contain significant amounts of N and O functional groups, it is important to understand the correlation between the chemical environments of these atoms and the catalytic performance of these materials. In this work, we prepared ammonia-reduced graphene oxide (A-rG-O) using a solution-based process and a series of A-rG-O samples thermally treated at high temperatures (300–700 ℃). We investigated the chemical structure of the as-prepared A-rG-O using solid-state nuclear magnetic resonance spectroscopy of 15N-labeled samples, and X-ray photoelectron spectroscopy, revealing the presence of pyridine, pyrrole and imidazole functional groups, as well as C-O and C=O groups in the rG-O network. Thermal treatment of the A-rG-O removed the N- and O-containing species, which are the catalytically active sites for the ORR. As a result overall electrocatalytic ORR performance diminished in terms of on-set and half-wave potentials, current density, and four-electron selectivity.

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