期刊
RSC ADVANCES
卷 5, 期 130, 页码 107270-107275出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra24625c
关键词
-
资金
- National Natural Science Foundation of China [21473258]
- Distinguished Young Scientists of Hunan Province [13JJ1004]
- Hunan Provincial Innovation Foundation for Postgraduate [CX2015B039]
In this article graphene quantum dots (GQDs) were prepared from activated graphene oxide (AGO) for the first time utilizing a reflux route. We focus on the relationship between surface structure and the electrochemical activity of graphene oxide (GO), AGO, GQDs and reduced graphene quantum dots (RGQDs). Surprisingly it was found that GQDs exhibited a much slower electron transfer rate of 1.105 x 10(-4) cm s(-1) compared with GO of 1.918 x 10(-3) cm s(-1) and AGO of 6.316 x 10(-3) cm s(-1). Obviously, a GQDs modified electrode surface can be completely blocked which might result from its low edge-to-basal plane rate though easy aggregation, rapid stacking and high oxygen-functional groups. Contrary to a general view that size-reducing is favorable to electrochemical kinetics, such findings, never reported before, imply that GQDs may not be suitable for applying to a beneficial single electrode material. GQDs, a new type of advanced materials of nanoscale, must be applied in a proper way in order to exert potential superiority to an utmost extent.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据