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Title: Ultraporous nitrogen-rich carbon nanosheets derived from the synergy of eutectic liquid and zeolitic imidazolate for energy applications

Journal Article · · Journal of Power Sources
 [1];  [1]; ORCiD logo [1];  [1];  [1]
  1. Univ. of California, Riverside, CA (United States)
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This report presents a unique and novel synthetic method for the preparation of highly porous nitrogen-rich carbon nanosheets from ZIF-8 (ZIF, zeolitic imidazolate framework) with the assistance of eutectic liquid. Due to the low melting temperature, a mixture of eutectic salts can provide a special atmosphere for the carbonization process and function as the template to support the ZIF-8 framework. The formation of the ultraporous nanosheets can be ascribed to the excellent miscibility between the eutectic salts and ZIF-8 framework, thus helping convert the ordered calcined intermediate species into extended carbon sheets at high temperature while inheriting the microporous structure from the prototypical ZIF-8. Furthermore, by controlling the ratio of eutectic liquid to ZIF-8 framework, the BET surface area of carbon nanosheets can be systematically tuned, with the highest BET surface area up to 2960 m2 g-1. In addition to this impressive high surface area, the pore size distribution follows well with the pristine ZIF-8. The nitrogen content varies from 9.9 wt. % to 13.4 wt. %. These characteristics contribute to the excellent performance of CO2 adsorption (5.45 mmol g-1 at 1atm and 273K) and oxygen reduction reaction (ORR) catalysis due to the large numbers of accessible active sites.

Research Organization:
Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0010596
OSTI ID:
1596464
Journal Information:
Journal of Power Sources, Vol. 434, Issue C; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
Ultraporous carbon material
ZIF derivative
carbon dioxide capture
oxygen reduction reaction