Ultrahigh Surface Area N-Doped Hierarchically Porous Carbon for Enhanced CO2 Capture and Electrochemical Energy Storage

Facile synthesis of ultrahigh surface area porous carbons with well-defined functionalities such as N-doping remains a formidable challenge as extensive pore creation results in significant damage to the active sites. Herein, an ultrahigh surface area, N-doped hierarchically porous carbon was prepared through a multicomponent co-assembly approach. The resultant N-doped hierarchically porous carbon (N-HPC) possessed an ultrahigh surface area (approximate to 1960 m(2) g(-1)), a uniform interpenetrating micropore (approximate to 1.3 nm) and large mesopore (approximate to 7.6 nm) size, and high N-doping in the carbon frameworks (approximate to 5 wt %). The N-HPC exhibited a high specific capacitance (358 F g(-1) at 0.5 A g(-1)) as a supercapacitor electrode in aqueous alkaline electrolyte with a stable cycling performance after10 000 charge/discharge cycles. Moreover, as a CO2 absorbent, N-HPC displayed an adsorption capacity of 29.0 mmol g(-1) at 0 degrees C under a high pressure of 30 bar.