纳微快报（英文）2020，Vol.12Issue(5)：1-19,19.
A Molecular Foaming and Activation Strategy to Porous N‑Doped Carbon Foams for Supercapacitors and CO2 Capture
摘要
Abstract
Hierarchically porous carbon materials are promising for energy storage, separation and catalysis. It is desirable but fairly challeng-ing to simultaneously cre-ate ultrahigh surface areas, large pore volumes and high N contents in these materi-als. Herein, we demonstrate a facile acid–base enabled in situ molecular foaming and activation strategy for the synthesis of hierarchically macro-/meso-/microporous N-doped carbon foams (HPNCFs). The key design for the synthesis is the selection of histidine (His) and potassium bicarbonate (PBC) to allow the formation of 3D foam structures by in situ foam-ing, the PBC/His acid–base reaction to enable a molecular mixing and subsequent a uniform chemical activation, and the stable imidazole moiety in His to sustain high N contents after carbonization. The formation mechanism of the HPNCFs is studied in detail. The prepared HPNCFs possess 3D macroporous frameworks with thin well-graphitized carbon walls, ultrahigh surface areas (up to 3200 m2 g?1), large pore volumes (up to 2.0 cm3 g?1), high micropore volumes (up to 0.67 cm3 g?1), narrowly distributed micropores and mesopores and high N contents (up to 14.6 wt%) with pyrrolic N as the predominant N site. The HPNCFs are promising for supercapacitors with high specifi?痈??c capacitances (185–240 F g?1), good rate capability and excellent stability. They are also excellent for -CO2 capture with a high adsorption capacity (~?4.13 mmol g?1), a large isosteric heat of adsorption (26.5 kJ mol?1) and an excellent -CO2/N2 selectivity (~?24).关键词
Porous carbon foams/Hierarchical pore structure/Nitrogen doping/Supercapacitors/CO2 captureKey words
Porous carbon foams/Hierarchical pore structure/Nitrogen doping/Supercapacitors/CO2 capture引用本文复制引用
Mengyuan Zhou,Yaqian Lin,Huayao Xia,Xiangru Wei,Yan Yao,Xiaoning Wang,Zhangxiong Wu..A Molecular Foaming and Activation Strategy to Porous N‑Doped Carbon Foams for Supercapacitors and CO2 Capture[J].纳微快报（英文）,2020,12(5):1-19,19.基金项目
Financial support from the National Natu-ral Science Foundation of China (Nos. 21875153, 21501125), the Natural Science Foundation of Jiangsu Province (BK20150312), and the Jiangsu Shuangchuang Team Program is appreciated. We also thank the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions and the Project of Scien-tific and Technologic Infrastructure of Suzhou (SZS201708) for support. （Nos. 21875153, 21501125）
