Polyethylenimine-Enhanced Electrocatalytic Reduction of CO2 to Formate at Nitrogen-Doped Carbon Nanomaterials
Journal of the American Chemical Society2014Vol. 136(22), pp. 7845–7848
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Sheng Zhang, Peng Kang, Stephen M. Ubnoske, M. Kyle Brennaman, Na Song, Ralph L. House, Jeffrey T. Glass, Thomas J. Meyer
Abstract
Nitrogen-doped carbon nanotubes are selective and robust electrocatalysts for CO2 reduction to formate in aqueous media without the use of a metal catalyst. Polyethylenimine (PEI) functions as a co-catalyst by significantly reducing catalytic overpotential and increasing current density and efficiency. The co-catalysis appears to help in stabilizing the singly reduced intermediate CO2(•-) and concentrating CO2 in the PEI overlayer.
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