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Oxygen Activation by N-doped Graphitic Carbon Nanostructures
Published online by Cambridge University Press: 23 February 2015
Abstract
Fundamental understanding of the oxygen reduction reaction (ORR) electrocatalyzed by nitrogen-doped carbon requires a well-defined structure to correlate structure to function. Well-characterized N-doped graphitic nanostructures derived from benzene derivatives have been synthesized in our group, and shown to catalyze a four-electron ORR under alkaline conditions. Density functional theory calculations have been performed on a model N-doped graphitic nanostructure, C50N2H20, to determine an oxygen activation mechanism. With guidance through an experimentally determined Pourbaix diagram, DFT calculations clearly indicate that the catalyst must undergo a 2e−,1H+ reduction to generate a reactive carbanionic intermediate that activates oxygen with a spin inversion.
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- MRS Online Proceedings Library (OPL) , Volume 1725: Symposium I – Emerging 1D and 2D Nanomaterials in Health Care , 2015 , mrsf14-1725-i02-05
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- Copyright © Materials Research Society 2015