Ultrahigh Surface Area N-Doped Hierarchically Porous Carbon for Enhanced CO2 Capture and Electrochemical Energy Storage.
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Qin, J
Zhao, Y
Duan, L
Wang, J
Gao, W
Wang, R
Wang, C
Pal, M
Wu, ZS
Li, W
Zhao, D
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Abstract
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 (≈1960 m2 g-1 ), a uniform interpenetrating micropore (≈1.3 nm) and large mesopore (≈7.6 nm) size, and high N-doping in the carbon frameworks (≈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 °C under a high pressure of 30 bar.
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ChemSusChem
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Analytical chemistry
Other chemical sciences
Chemical engineering