Citation: ZHOU Yang, CHENG Qing-Qing, HUANG Qing-Hong, ZOU Zhi-Qing, YAN Liu-Ming, YANG Hui. Highly Dispersed Cobalt-Nitrogen Co-doped Carbon Nanofiber as Oxygen Reduction Reaction Catalyst[J]. Acta Physico-Chimica Sinica, ;2017, 33(7): 1429-1435. doi: 10.3866/PKU.WHXB201704131 shu

Highly Dispersed Cobalt-Nitrogen Co-doped Carbon Nanofiber as Oxygen Reduction Reaction Catalyst

1.
College of Sciences, Shanghai University, Shanghai 200444, P. R. China;
2.
Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, P. R. China

Received Date: 20 February 2017
Revised Date: 5 April 2017

Fund Project: The project was supported by the National High-tech R&D Program (863 Program, 2015AA043503) and the Nature Science Foundation of China (21533005, 21673275).

Transition metal-nitrogen doped carbon-based catalysts have become promising alternatives to precious metal catalysts for the oxygen reduction reaction (ORR). Here, we report a nitrogen-doped carbon nanofiber electrocatalyst coordinated with highly dispersed cobalt atoms (Co-N/C) with a high specific surface area prepared by an electrospinning method. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) results confirmed that Co was highly dispersed within the prepared Co-N/C catalyst. X-ray photoelectron spectroscopy for N 1s spectra showed that the N species mainly existed in the forms of pyridinic N and graphitic N. This Co-N/C catalyst exhibited considerable ORR performance with onset and half-wave potentials at 0.92 and 0.80 V (relative to the reversible hydrogen electrode (RHE)), which are comparable to those of commercial Pt/C. With the prepared Co-N/C catalyst as the cathode, a Zn-air battery displayed an open-circuit potential of 1.54 V and a peak power density of 190 mW·cm^-2 at 25℃, which suggest a promising application.
- Oxygen reduction reaction,
- Transition metal-nitrogen doped catalyst,
- Carbon nanofibers,
- Highly dispersed,
- Electrospinning
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