Observation of active sites for oxygen reduction reaction on nitrogen-doped multilayer graphene

Xing, Tan, Zheng, Yao, Li, Lu Hua, Cowie, Bruce C. C., Gunzelmann, Daniel, Qiao, Shi Zhang, Huang, Shaoming and Chen, Ying (2014) Observation of active sites for oxygen reduction reaction on nitrogen-doped multilayer graphene. ACS Nano, 8 7: 6856-6862. doi:10.1021/nn501506p


Author Xing, Tan
Zheng, Yao
Li, Lu Hua
Cowie, Bruce C. C.
Gunzelmann, Daniel
Qiao, Shi Zhang
Huang, Shaoming
Chen, Ying
Title Observation of active sites for oxygen reduction reaction on nitrogen-doped multilayer graphene
Journal name ACS Nano   Check publisher's open access policy
ISSN 1936-0851
1936-086X
Publication date 2014-07-22
Year available 2014
Sub-type Article (original research)
DOI 10.1021/nn501506p
Open Access Status Not yet assessed
Volume 8
Issue 7
Start page 6856
End page 6862
Total pages 7
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Abstract Active sites and the catalytic mechanism of nitrogen-doped graphene in an oxygen reduction reaction (ORR) have been extensively studied but are still inconclusive, partly due to the lack of an experimental method that can detect the active sites. It is proposed in this report that the active sites on nitrogen-doped graphene can be determined via the examination of its chemical composition change before and after ORR. Synchrotron-based X-ray photoelectron spectroscopy analyses of three nitrogen-doped multilayer graphene samples reveal that oxygen reduction intermediate OH(ads), which should chemically attach to the active sites, remains on the carbon atoms neighboring pyridinic nitrogen after ORR. In addition, a high amount of the OH(ads) attachment after ORR corresponds to a high catalytic efficiency and vice versa. These pinpoint that the carbon atoms close to pyridinic nitrogen are the main active sites among the different nitrogen doping configurations.
Keyword Fuel cells
Nitrogen doped (N doped) graphene
Oxygen reduction reactions
X ray photoelectron spectroscopy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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