Journal
APPLIED SURFACE SCIENCE
Volume 495, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.143597
Keywords
Carbon quantum dots; Carbon nanotube; Nitrogen doping; Oxygen reduction reaction
Categories
Funding
- Shenzhen University, China [2019013, 2019023]
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A facile one-pot hydrothermal method was proposed to fabricate nitrogen-doped carbon quantum dots (N-doped CQDs) on the surface of nitrogen-doped carbon nanotube (N-doped CNTs). The microstructure of the N-doped CQDs/N-doped CNTs hybrid was investigated by using transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Furthermore, their electrocatalytic activity of the N-doped CQDs/N-doped CNTs hybrid in oxygen reduction reaction (ORR) was systematically evaluated and it was found that the N-doped CQDs/N CNTs hybrid deposited as such exhibits a high performance for ORR in terms of a low onset potential of - 0.03 V vs. Ag/AgCl, a high limiting diffusion current density of similar to 5.5 mA cm(-2), and a one-step 4e ORR process, holding great potential for future metal-free catalysts.
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