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Reducing CO₂ to dense nanoporous graphene by Mg/Zn for high power electrochemical capacitors

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https://ir.library.oregonstate.edu/concern/articles/0c483m332

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Abstract
  • Converting CO2 to valuable materials is attractive.Herein, we report using simple metallothermic reactions to reduce atmospheric CO2 to dense nanoporous graphene. By using a Zn/Mg mixture as a reductant, the resulted nanoporous graphene exhibits highly desirable properties: high specific surface area of 1900 m2/g, a great conductivity of 1050 S/m and a tap density of 0.63 g/cm3, comparable to activated carbon. The nanoporous graphene contains a fine mesoporous structure constructed by curved few-layer graphene nanosheets. The unique property ensemble enables one of the best high-rate performances reported for electrochemical capacitors: a specific capacitance of ~170F/g obtained at 2000 mV/s and 40 F/g at a frequency of 120 Hz. This simple fabricating strategy conceptually provides opportunities for materials scientists to design and prepare novel carbon materials with metallothermic reactions.
  • This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/nano-energy/.
  • Keywords: Magnesiothermic reduction, Nanoporous graphene, CO₂ reduction, Electrochemical capacitors
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  • Xing, Z., Wang, B., Gao, W., Pan, C., Halsted, J. K., Chong, E. S., ... & Ji, X. (2015). Reducing CO₂ to dense nanoporous graphene by Mg/Zn for high power electrochemical capacitors. Nano Energy, 11, 600-610. doi:10.1016/j.nanoen.2014.11.011
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  • 11
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  • X. J. gratefully acknowledges the financial support from Oregon State University.
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file details XingZhenyuChemistryReducingCO2DenseNanoporous.pdf 07/26/2017 公开
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