Effect of carbon nanofiber surface functional groups on oxygen reduction in alkaline solution

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	Effect of carbon nanofiber surface functional groups on oxygen reduction in alkaline solution
	Zhong, R. S. ; Qin, Y. H. ; Niu, D. F. ; Tian, J. W. ; Zhang, X. S. ; Zhou, X. G. ; Sun, S. G. ; Yuan, W. K. ; Sun SG(孙世刚)
刊名	http://dx.doi.org/10.1016/j.jpowsour.2012.10.043
	2013-03
关键词	Oxygen reduction reaction Electrocatalyst Carbon nanofiber Surface functional groups
英文摘要	Carbon nanofibers (CNFs) with different content of surface functional groups which are carboxyl groups (CNF-OX), carbonyl groups (CNF-CO) and hydroxyl groups (CNF-OH) and nitrogen-containing groups (CNF-ON) are synthesized, and their electrocatalytic activities toward oxygen reduction reaction (ORR) in alkaline solution are investigated. The result of X-ray photoelectron spectroscopy (XPS) characterization indicates that a higher concentration of carboxyl groups, carbonyl groups and hydroxyl groups are imported onto the CNF-OX, CNF-CO and CNF-OH, respectively. Cyclic voltammetry shows that both the oxygen- and nitrogen-containing groups can improve the electrocatalytic activity of CNFs for ORR. The CNF-ON/GC electrode, which has nitrogen-containing groups, exhibits the highest current density of ORR. Rotating disk electrode (RDE) characterization shows that the oxygen reduction on CNF-ON/GC electrode proceeds almost entirely through the four-electron reduction pathway, the CNF-OX/GC, CNF-CO/GC and CNF-OH/GC electrodes proceed a two-electron reduction pathway at low potentials (-0.2 V to -0.6 V) followed by a gradual four-electron reduction pathway at more negative potentials, while the untreated carbon nanofiber (CNF-P/GC) electrode proceeds predominantly by a two-electron reduction pathway within the whole range of potential studied. (C) 2012 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/61688]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zhong, R. S.,Qin, Y. H.,Niu, D. F.,et al. Effect of carbon nanofiber surface functional groups on oxygen reduction in alkaline solution[J]. http://dx.doi.org/10.1016/j.jpowsour.2012.10.043,2013.
APA	Zhong, R. S..,Qin, Y. H..,Niu, D. F..,Tian, J. W..,Zhang, X. S..,...&孙世刚.(2013).Effect of carbon nanofiber surface functional groups on oxygen reduction in alkaline solution.http://dx.doi.org/10.1016/j.jpowsour.2012.10.043.
MLA	Zhong, R. S.,et al."Effect of carbon nanofiber surface functional groups on oxygen reduction in alkaline solution".http://dx.doi.org/10.1016/j.jpowsour.2012.10.043 (2013).