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Issue 14, 2016
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An efficient sewage sludge-derived bi-functional electrocatalyst for oxygen reduction and evolution reaction

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Abstract

An efficient, low cost, and stable bi-functional electrocatalyst consisting of N, Fe, and S multi-doped nanoporous carbon was produced by a green and facile one-step pyrolysis of sewage sludge under NH3 conditions. The as-synthesized multi-doped electrocatalyst shows excellent electrocatalytic activities for oxygen reduction reaction (ORR) in both alkaline and acid media, which compares favorably with the commercial 20% Pt/C catalyst. The electrocatalyst also exhibits superior oxygen evolution reaction (OER) performance with favorable stability. The hierarchically porous structure, favorable surface area, and unique N, Fe, and S multi-doped carbon framework stem from the particular composition of sewage sludge and the NH3 atmosphere is responsible for the excellent catalytic efficiency of the as-synthesized electrocatalyst. This development offers a straightforward environment-compatible route for synthesizing attractive bi-functional electrocatalyst materials as promising candidates for fuel cells directly from a type of pollutant.

Graphical abstract: An efficient sewage sludge-derived bi-functional electrocatalyst for oxygen reduction and evolution reaction

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Publication details

The article was received on 13 Nov 2015, accepted on 13 Apr 2016 and first published on 14 Apr 2016


Article type: Paper
DOI: 10.1039/C5GC02729B
Citation: Green Chem., 2016,18, 4004-4011
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    An efficient sewage sludge-derived bi-functional electrocatalyst for oxygen reduction and evolution reaction

    S. Yuan and X. Dai, Green Chem., 2016, 18, 4004
    DOI: 10.1039/C5GC02729B

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