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- Title
Synergistic Effects between Atomically Dispersed Fe−N−C and C−S−C for the Oxygen Reduction Reaction in Acidic Media.
- Authors
Shen, Hangjia; Gracia‐Espino, Eduardo; Ma, Jingyuan; Zang, Ketao; Luo, Jun; Wang, Le; Gao, Sanshuang; Mamat, Xamxikamar; Hu, Guangzhi; Wagberg, Thomas; Guo, Shaojun
- Abstract
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 4 e− 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 0.5 m H2SO4.
- Subjects
OXYGEN reduction; SULFUR; CATALYSTS; SURFACE area; ELECTRIC conductivity
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 44, p13988
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201706602