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Dai, Liming
Dr. Liming Dai's Group
Research Interests
  • Synthesis

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Polyelectrolyte-Functionalized Graphene as Metal-Free Electrocatalysts for Oxygen Reduction

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Title
Polyelectrolyte-Functionalized Graphene as Metal-Free Electrocatalysts for Oxygen Reduction
Author
Wang, ShuangyinYu, DingshanDai, LimingChang, Dong WookBaek, Jong-Beom
Keywords
graphene; PDDA; oxygen reduction reaction; fuel cells; charge transfer
Issue Date
201108
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.5, no.8, pp.6202 - 6209
Abstract
Poly(diallyldimethylammonium chloride), PDDA, Was used as an electron acceptor for functionalizing graphene to impart electrocatalytic activity for the oxygen reduction reaction (ORR) In fuel cells. Raman and X-ray photoelectron spectroscopic measurements indicate the charge transfer from graphene to PDDA. The resultant graphene positively charged via intermolecular charge-transfer with PDDA was demonstrated to show remarkable electrocatalytic activity toward ORR with better fuel selectivity, tolerance to CO posing, and long-term stability than that of the commercially available Pt/C electrode. The observed ORR electrocatalytic activity Induced by the intermolecular charge-transfer provides a general approach to various carbon-based metal-free ORR catalysts for oxygen reduction.
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DOI
http://dx.doi.org/10.1021/nn200879h
ISSN
1936-0851
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ECHE_Journal Papers
MNE_Journal Papers

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