Issue 5, 2012
From the journal:

Green Chemistry

A one-pot hydrothermal synthesis of sulfur and nitrogen doped carbon aerogels with enhanced electrocatalytic activity in the oxygen reduction reaction†

Stephanie-Angelika Wohlgemuth,*a   Robin Jeremy White,a   Marc-Georg Willinger,b   Maria-Magdalena Titiricia  and  Markus Antoniettia  

* Corresponding authors

a Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14467 Potsdam, Germany
E-mail: stephanie.wohlgemuth@mpikg.mpg.de
Fax: +49-331-56-9502
Tel: +49-331-567-9562

b Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Berlin, Germany

Abstract

A one-pot, hydrothermal synthesis of nitrogen and sulfur dual doped carbon aerogels is presented, derived from our previously published hydrothermal carbonization approach. Two co-monomers, S-(2-thienyl)-L-cysteine (TC) and 2-thienyl carboxaldehyde (TCA), were used for sulfur incorporation, giving rise to distinct morphologies and varying doping levels of sulfur. Nitrogen-doping levels of 5 wt% and sulfur-doping levels of 1 wt% (using TCA) to 4 wt% (using TC) were obtained. A secondary pyrolysis step was used to further tune the carbon aerogel conductivity and heteroatom binding states. By comparing solely nitrogen-doped with nitrogen- and sulfur-doped carbon aerogels, it was observed that the presence of sulfur improves the overall electrocatalytic activity of the carbon material in both basic and acidic media. This study of the synergistic effect of combined sulfur- and nitrogen-doping in the catalysis of the “oxygen reduction reaction” (ORR) is expected to be significant to future research concerning the improvement of heterogeneous, metal-free, carbon-based catalysts.

Graphical abstract: A one-pot hydrothermal synthesis of sulfur and nitrogen doped carbon aerogels with enhanced electrocatalytic activity in the oxygen reduction reaction

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Article information

DOI
https://doi.org/10.1039/C2GC35309A
Article type
Paper
Submitted
01 Mar 2012
Accepted
09 Mar 2012
First published
03 Apr 2012

Green Chem., 2012,14, 1515-1523

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A one-pot hydrothermal synthesis of sulfur and nitrogen doped carbon aerogels with enhanced electrocatalytic activity in the oxygen reduction reaction

S. Wohlgemuth, R. J. White, M. Willinger, M. Titirici and M. Antonietti, Green Chem., 2012, 14, 1515 DOI: 10.1039/C2GC35309A

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