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Synergistic Effects between Atomically Dispersed Fe-N-C and C-S-C for the Oxygen Reduction Reaction in Acidic Media
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 56, nr 44, s. 13800-13804Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Various advanced catalysts based on sulfur-doped Fe/N/C materials have recently been designed for the oxygen reduction reaction (ORR); however, the enhanced activity is still controversial and usually attributed to differences in the surface area, improved conductivity, or uncertain synergistic effects. Herein, a sulfur-doped Fe/N/C catalyst (denoted as Fe/SNC) was obtained by a template-sacrificing method. The incorporated sulfur gives a thiophene-like structure (C-S-C), reduces the electron localization around the Fe centers, improves the interaction with oxygenated species, and therefore facilitates the complete 4e(-) ORR in acidic solution. Owing to these synergistic effects, the Fe/SNC catalyst exhibits much better ORR activity than the sulfur-free variant (Fe/NC) in 0.5m H2SO4.

sted, utgiver, år, opplag, sider
2017. Vol. 56, nr 44, s. 13800-13804
Emneord [en]
doping, iron, oxygen reduction reaction, sulfur, synergistic effects
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-142266DOI: 10.1002/anie.201706602ISI: 000413314800047PubMedID: 28857381OAI: oai:DiVA.org:umu-142266DiVA, id: diva2:1163114
Tilgjengelig fra: 2017-12-06 Laget: 2017-12-06 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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