Issue 77, 2016

Astridia velutina-like S, N-codoped hierarchical porous carbon from silk cocoon for superior oxygen reduction reaction

Abstract

The development of heteroatom-doped nanostructured metal-free carbon materials for the oxygen reduction reaction (ORR) is a critical challenge. In this work, through a one-step heat treatment, Astridia velutina-like S, N-codoped micro–mesoporous carbon (SNC-x) was synthesized from silk cocoon. The product was fully characterized by physicochemical and electrochemical techniques. The sample obtained at 800 °C possessed a unique hierarchical porous structure with 9.75 at% N and 1.79 at% S content, providing abundant active sites and thus facilitating efficient mass transport. The ORR activity was observed with an onset potential of 0.853 V (vs. RHE), comparable current density (4.5 mA cm−2 at 0 V) to commercial Pt/C as well as good methanol tolerance and electrochemical stability in alkaline electrolyte. Benefiting from the cheap biomass precursor and unique structural features, the product may serve as a potential candidate for energy storage, conservation and environmental applications, etc.

Graphical abstract: Astridia velutina-like S, N-codoped hierarchical porous carbon from silk cocoon for superior oxygen reduction reaction

Supplementary files

Article information

Article type
Paper
Submitted
13 Mar 2016
Accepted
28 Jul 2016
First published
29 Jul 2016

RSC Adv., 2016,6, 73560-73565

Astridia velutina-like S, N-codoped hierarchical porous carbon from silk cocoon for superior oxygen reduction reaction

Y. Wang, Y. Lei and H. Wang, RSC Adv., 2016, 6, 73560 DOI: 10.1039/C6RA06664J

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