Jump to main content
Jump to site search


Co9S8 nanoparticles anchored on nitrogen and sulfur dual-doped carbon nanosheets as highly efficient bifunctional electrocatalyst for oxygen evolution and reduction reactions

Author affiliations

Abstract

To promote the practical application of electrochemical energy storage and conversion systems, nonprecious electrocatalysts of low cost and with highly efficient performance in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are highly desired. In this work, a cubic sodium chloride (NaCl) crystal-templated strategy is proposed for coupling Co9S8 nanoparticles to nitrogen- and sulfur-doped carbon nanosheets (Co9S8/N,S-CNS) by facile pyrolysis. The nitrogen and sulfur dual-doped carbon nanosheets can effectively prevent the aggregation of Co9S8 nanoparticles and greatly improve the conductivity of the hybrid structure. The well-dispersed Co9S8 nanoparticles could provide more active sites. When evaluated as a bifunctional electrocatalyst, an overpotential of 350 mV could yield 10 mA cm−2 current density for OER and a high onset potential around 0.90 V vs. RHE was obtained with a four-electron pathway for ORR, which is comparable to that of a Pt/C catalyst. The remarkable electrochemical performance can be attributed to the synergistic catalytic effect of Co9S8 nanoparticles and the N,S-doped carbon nanosheets. Considering the simplicity, low cost and scalability of the approach, the strategy presented here can be extendable to the preparation of other nanoparticles/carbon hybrid nanosheets, which may potentially be applied in the fields of high-performance supercapacitors, lithium-ion batteries, catalysts, sensors, adsorbents and so on.

Graphical abstract: Co9S8 nanoparticles anchored on nitrogen and sulfur dual-doped carbon nanosheets as highly efficient bifunctional electrocatalyst for oxygen evolution and reduction reactions

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jun 2017, accepted on 28 Jul 2017 and first published on 31 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03950F
Citation: Nanoscale, 2017, Advance Article
  •   Request permissions

    Co9S8 nanoparticles anchored on nitrogen and sulfur dual-doped carbon nanosheets as highly efficient bifunctional electrocatalyst for oxygen evolution and reduction reactions

    C. Wu, Y. Zhang, D. Dong, H. Xie and J. Li, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR03950F

Search articles by author

Spotlight

Advertisements