Functions in cooperation for enhanced oxygen reduction reaction: the independent roles of oxygen and nitrogen sites in metal-free nanocarbon and their functional synergy

Wu, Kuang-Hsu, Wang, Da-Wei, Zong, Xu, Zhang, Bingsen, Liu, Yuefeng, Gentle, Ian R. and Su, Dang-Sheng (2017) Functions in cooperation for enhanced oxygen reduction reaction: the independent roles of oxygen and nitrogen sites in metal-free nanocarbon and their functional synergy. Journal of Materials Chemistry A, 5 7: 3239-3248. doi:10.1039/c6ta10336g


Author Wu, Kuang-Hsu
Wang, Da-Wei
Zong, Xu
Zhang, Bingsen
Liu, Yuefeng
Gentle, Ian R.
Su, Dang-Sheng
Title Functions in cooperation for enhanced oxygen reduction reaction: the independent roles of oxygen and nitrogen sites in metal-free nanocarbon and their functional synergy
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7496
2050-7488
Publication date 2017-02-21
Sub-type Article (original research)
DOI 10.1039/c6ta10336g
Open Access Status Not yet assessed
Volume 5
Issue 7
Start page 3239
End page 3248
Total pages 10
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Collection year 2018
Language eng
Formatted abstract
Heteroatom-doped nanocarbons are known to behave differently in the oxygen reduction reaction (ORR) in aqueous systems. In the present study, we reveal the dissimilar roles of oxygen and nitrogen sites in nanocarbons and show that the different functions can jointly promote the ORR in cooperation when appropriately combined. The oxygen sites in general could efficiently facilitate both the HO2- generation and the reduction at high overpotential, while the active nitrogen sites could activate the ORR with a lower energy requirement and simultaneously reduce both O2 and HO2- at low overpotential. A further study to integrate the functionalities in a single nanocarbon reveals the oxidation-resistant nature of the active nitrogen functional group, a chemical basis for the reactivity.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Chemistry and Molecular Biosciences
 
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