Journal
GREEN CHEMISTRY
Volume 18, Issue 14, Pages 4004-4011Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5gc02729b
Keywords
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Funding
- National Natural Science Foundation of China [51538008, 51308401]
- Key Program for International S&T Cooperation Projects of China [2014DFA91650]
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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.
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