BROWSE

Related Scientist

Researcher

나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
more info

Variation of nitrogen species in zeolite-templated carbon by low-temperature carbonization of pyrrole and the effect on oxygen reduction activity

Cited 0 time in webofscience Cited 0 time in scopus
8 Viewed 1 Downloaded
Title
Variation of nitrogen species in zeolite-templated carbon by low-temperature carbonization of pyrrole and the effect on oxygen reduction activity
Author(s)
Seung Won Han; Jisuk Bang; Seung Hyeon Ko; Ryong Ryoo
Publication Date
2019-04
Journal
JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.14, pp.8353 - 8360
Publisher
ROYAL SOC CHEMISTRY
Abstract
© 2019 The Royal Society of Chemistry. Nitrogen-doped microporous carbons with various compositions of pyridinic, pyrrolic, and graphitic N species were synthesized by the pyrolysis of pyrrole using Ca 2+ ion-exchanged Y zeolite as a template. The Ca 2+ ions in zeolite pores served as a catalyst to lower the carbonization temperature, resolving the problems associated with high carbonization temperature, such as inhomogeneous carbon deposition, easy breakage of weak C-N bonds, and preferential formation of thermodynamically stable graphitic N species. The resultant carbons exhibited a 3D microporous structure with high surface area and uniform micropore diameters, as well as high N content (5-6 wt%). Taking advantage of the lowered carbonization temperature, the ratio of the N species was modulated by the carbonization temperature, while a similar pore structure of the carbons was maintained. These N-doped carbons were used to investigate the efficiency of each N species on the electrochemical oxygen reduction, without the influences from the porous structure of the carbons. The results of this electrochemical investigation indicate that the graphitic N was more effective in enhancing the oxygen-reduction performance of the 3D microporous carbons than pyridinic N
URI
https://pr.ibs.re.kr/handle/8788114/6312
ISSN
2050-7488
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
J. Mater. Chem. A, 2019, 7, 8353–8360.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse