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Co9S8 activated N/S co-doped carbon tubes in situ grown on carbon nanofibers for efficient oxygen reduction

Herein, we report a facile and environment-friendly route for the preparation of Co9S8 activated N/S co-doped carbon tubes (denoted as Co9S8@N/S–CT) in situ grown on a carbon nanofiber network derived… Click to show full abstract

Herein, we report a facile and environment-friendly route for the preparation of Co9S8 activated N/S co-doped carbon tubes (denoted as Co9S8@N/S–CT) in situ grown on a carbon nanofiber network derived from bacterial cellulose. The as-prepared Co9S8@N/S–CT has a novel microstructure with homogeneous and lotus root-like carbon tubes plugged with Co9S8 active substance, which are embedded in the carbon nanofibers. This nonprecious Co9S8@N/S–CT composite has a comparable catalytic activity for the oxygen reduction reaction and superior stability compared with commercial Pt/C catalyst. This is attributed to a synergistic catalytic effect due the intimate contact between Co9S8 active sites and the highly conductive heteroatom doped carbon tubes, showing the great potential for using the Co9S8@N/S–CT composite as a novel non-precious cathode catalyst in fuel cells or metal–air battery applications.

Keywords: doped carbon; carbon; co9s8 activated; activated doped; carbon tubes; situ grown

Journal Title: RSC Advances
Year Published: 2017

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