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Dual active nitrogen doped hierarchical porous hollow carbon nanospheres as oxygen reduction electrocatalyst for zinc-air batteries

Abstract

Developing non-platinum catalysts for oxygen reduction reaction (ORR) becomes urgent for electrochemical energy devices. Herein, we synthesize N-doped hollow carbon nanospheres (N-HCNs) which only contain active pyridinic-N and graphitic-N by using polystyrene sphere and aniline as corresponding template and precursor. The electrochemical measurements show N-HCNs own superior ORR electrocatalytic activity (half-wave potential is 15 mV higher than the precious Pt/C electrocatalyst), durability and anti-toxicity to Pt/C in alkaline media. Simultaneously, N-HCNs also reveal comparable ORR activity and superior stability to Pt/C in acidic media. Such high ORR performance can be ascribed to its hierarchical porous structure, ultra-high specific surface area, plenty of edge defects and high contents of active N atoms. Noteworthily, when used as catalyst for the air electrode of zinc-air batteries, N-HCNs present a higher power density and a larger operation voltage than Pt/C at the same discharge current density.

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Publication details

The article was received on 16 Jun 2017, accepted on 11 Aug 2017 and first published on 11 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR04349J
Citation: Nanoscale, 2017, Accepted Manuscript
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    Dual active nitrogen doped hierarchical porous hollow carbon nanospheres as oxygen reduction electrocatalyst for zinc-air batteries

    J. Zhu, H. Zhou, C. Zhang, J. Zhang and S. Mu, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04349J

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