期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 135, 期 4, 页码 1386-1393出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja3091643
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资金
- WCU (World Class University) program through the National Research Foundation (NRF) of Korea
- U.S.-Korea NBIT program through the National Research Foundation (NRF) of Korea
- Converging Research Center (CRC) program through the National Research Foundation (NRF) of Korea
- Mid-Career program through the National Research Foundation (NRF) of Korea
- Basic Research Laboratory (BRL) program through the National Research Foundation (NRF) of Korea
- Ministry of Education, Science, and Technology (MEST)
- U.S. Air Force Office of Scientific Research through the Asian Office of Aerospace RD (AFOSR-AOARD)
- National Research Foundation of Korea [2010-00301, R31-2012-000-20012-0, 2010-0019408, 2012R1A2A2A01045911] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Edge-selectively functionalized graphene nanoplatelets (EFGnPs) with different functional groups were efficiently prepared simply by dry ball milling graphite in the presence of hydrogen, carbon dioxide, sulfur trioxide, or carbon dioxide/sulfur trioxide mixture. Upon exposure to air moisture, the resultant hydrogen- (HGnP), carboxylic acid- (CGnP), sulfonic acid- (SGnP), and carboxylic acid/sulfonic acid- (CSGnP) functionalized GnPs readily dispersed into various polar solvents, including neutral water. The resultant EFGnPs were then used as electrocatalysts for oxygen reduction reaction (ORR) in an alkaline electrolyte. It was found that the edge polar nature of the newly prepared EFGnPs without heteroatom doping into their basal plane played an important role in regulating the ORR efficiency with the electrocatalytic activity in the order of SGnP > CSGnP > CGnP > HGnP > pristine graphite. More importantly, the sulfur-containing SGnP and CSGnP were found to have a superior ORR performance to commercially available platinum-based electrocatalyst.
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