JOURNAL ARTICLE

Polyelectrolyte functionalized carbon nanotubes as efficient metal-free electrocatalysts for oxygen reduction

Shuangyin Wang, Dingshan Yu, Liming Dai
Journal of the American Chemical Society 2011 April 13, 133 (14): 5182-5
21413707
Having a strong electron-withdrawing ability, poly(diallyldimethylammonium chloride) (PDDA) was used to create net positive charge for carbon atoms in the nanotube carbon plane via intermolecular charge transfer. The resultant PDDA functionalized/adsorbed carbon nanotubes (CNTs), either in an aligned or nonaligned form, were demonstrated to act as metal-free catalysts for oxygen reduction reaction (ORR) in fuel cells with similar performance as Pt catalysts. The adsorption-induced intermolecular charge-transfer should provide a general approach to various carbon-based efficient metal-free ORR catalysts for oxygen reduction in fuel cells, and even new catalytic materials for applications beyond fuel cells.

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