Details

Autor(en) / Beteiligte

• Wu, Zexing
• Wang, Jie
• Han, Lili
• Lin, Ruoqian
• Liu, Hongfang
• Xin, Huolin L
• Wang, Deli

Titel

Supramolecular gel-assisted synthesis of double shelled Co@CoO@N-C/C nanoparticles with synergistic electrocatalytic activity for the oxygen reduction reactionElectronic supplementary information (ESI) available. See DOI: 10.1039/c5nr07929b

Erscheinungsjahr

2016-02

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Investigating active, stable, and low-cost materials for the oxygen reduction reaction is one of the key challenges in fuel-cell research. In this work, we describe the formation of N-doped carbon shell coated Co@CoO nanoparticles supported on Vulcan XC-72 carbon materials (Co@CoO@N-C/C) based on a simple supramolecular gel-assisted method. The double-shelled Co@CoO@N-C/C core-shell nanoparticles exhibit superior electrocatalytic activities for the oxygen reduction reaction compared to N-doped carbon and cobalt oxides, demonstrating the synergistic effect of the hybrid nanomaterials. Notably, the Co@CoO@N-C/C nanoparticles give rise to a comparable four-electron selectivity, long-term stability, and high methanol tolerance; all show a multi-fold improvement over the commercial Pt/C catalyst. The progress is of great importance in exploring advanced non-precious metal-based electrocatalysts for fuel cell applications. A double shelled Co@CoO@N-C/C was synthesized through a supramolecular gel assisted strategy. The material exhibits an outstanding ORR performance due to the synergistic effect of cobalt and nitrogen.