期刊
NANO ENERGY
卷 36, 期 -, 页码 286-294出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.04.014
关键词
Mesoporous carbons; Iron-nitrogen-doped carbon; Electrocatalysts; Oxygen reduction reaction; Soft-templates
类别
资金
- Australian Research Council (ARC) [FT150100479]
- AIIM-MANA
- Australian Research Council [FT150100479] Funding Source: Australian Research Council
- Grants-in-Aid for Scientific Research [15F15766, 16F16050] Funding Source: KAKEN
Non-precious iron-nitrogen doped carbon material (Fe-N/C) is the most promising candidate to replace platinum-based catalysts for oxygen reduction reaction (ORR) taking place at the cathode in fuel cells. In this study, three-dimensionally (3D) ordered mesoporous Fe-N/C with open porous structure is successfully synthesized. The obtained shape is a rhombic dodecahedron which corresponds to a single mesoporous crystal with body-centered cubic structure (Im-3m). By applying an optimal post-treatment of NH3 activation, a high content of beneficial pyridinic nitrogen can be doped while maintaining the ordered mesoporous architecture with high surface area and large pore volume. Our mesoporous Fe-N/C greatly promotes ORR performance with a high onset potential of 1.018 V and limited-diffusion current density of 5.98 mA cm(-2) in alkaline electrolyte. Interestingly, this mesoporous Fe-N/C also shows good ORR catalytic activity in acidic condition with onset potential and limited-diffusion current density as high as 0.935 V and 5.60 mA cm(-2), respectively.
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