Journal
ACS NANO
Volume 5, Issue 8, Pages 6202-6209Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn200879h
Keywords
graphene; PDDA; oxygen reduction reaction; fuel cells; charge transfer
Categories
Funding
- NSF [CMMI-1000768, CMS-1047655]
- AFOSR [FA9550-09-1-0331, FA2386-10-1-4071, FA9550-10-1-0546]
- WCU
- Ministry of Education, Science and Technology in Korea through UNIST
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1047655] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1000768] Funding Source: National Science Foundation
- National Research Foundation of Korea [2010-00301, R31-2011-000-20012-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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