化学
聚丙烯腈
介孔材料
热解
水溶液
化学工程
纳米纤维素
氮气
比表面积
催化作用
碳纤维
纳米颗粒
多孔性
有机化学
聚合物
纤维素
材料科学
复合数
复合材料
工程类
作者
Jianan Zhang,Yang Song,Maciej Kopeć,Jaejun Lee,Zongyu Wang,Siyuan Liu,Jiajun Yan,Rui Yuan,Tomasz Kowalewski,Michael R. Bockstaller,Krzysztof Matyjaszewski
摘要
An aqueous-based approach for the scalable synthesis of nitrogen-doped porous carbons with high specific surface area (SSA) and high nitrogen content is presented. Low molecular weight polyacrylonitrile (PAN) is solubilized in water in the presence of ZnCl2 that also acts as a volatile porogen during PAN pyrolysis to form mesoporous structures with significantly increased SSA. By templating with commercial SiO2 nanoparticles, nanocellulose fillers or filter paper, nanocarbons with SSA = 1776, 1366, and 1501 m2/g, respectively and 10 wt % N content were prepared. The materials formed by this benign process showed excellent catalytic activity in oxygen reduction reaction via the four-electron mechanism.
科研通智能强力驱动
Strongly Powered by AbleSci AI