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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Highly activated and heteroatom-doped nanoporous carbon spheres for gas sorption and oxygen reduction reaction (ORR) applications

2018년 2월 5일 15시 43분 02초
INOR.P-70 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Hee Soo Kim, So Young Lim1, Hyuna Kyung1, Won Cheol Yoo*
Department of Applied Chemistry, Hanyang University, Korea
1Department of Applied chemistry, Hanyang University, Korea
Herein, we controlled the porosity (pore size distribution (PSD) and specific surface area (SSA)) and polarity (N-doping and Fe-N codoping) of various carbonaceous materials for CO2, CH4, and N2 adsorption and oxygen reduction reaction catalyst. Two different carbons (resorcinol-formaldehyde carbon (RFC) and highly N-doped melanin carbon (MC)) with different N-doping levels are utilized and further activated by CO2 treatment to closely control PSD and SSA. In case of CH4 adsorption, the accumulated ultramicropore (<0.7 nm or <1 nm) volume of both carbons is strongly correlated with CH4 adsorption regardless of surface polarity of carbons (R2=0.99 for CO2). This is probably due to the high polarizability and nonpolar nature CH4 (RFC_C60 and MC_C55). Especially, CO2 adsorption is affected by specific ultramicropore volume and chemisorption effect by nitrogen groups is also critical to CO2 sorption. Therefore, RFC_N10 (Post-synthetic treatment for N doping by NH3 activation) and MC_C65 showed higher CO2 adsorption capacity even though they had the almost same ultramicropore volume of RFC samples (RFC_N10 and MC_C65). In addition, these materials can be used as Fe-N-C catalyst support and metal free N-doped catalyst for ORR catalysts. The most active Fe–N–C (Fe–N–RFC_C240) and N-doped MC (MC_C125) with ultrahigh surface areas of 2913 and 2677 m2g-1 showed an excellent ORR activities with a favored four electron reduction pathway, long-term durability, and better methanol tolerance, comparable to a commercial Pt-based catalyst.