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Highly graphitized nitrogen-doped porous carbon nanopolyhedra derived from ZIF-8 nanocrystals as efficient electrocatalysts for oxygen reduction reactions.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhang, Linjie Su, Zixue Jiang, Feilong Yang, Lingling Qian, Jinjie Zhou, Youfu Li, Wenmu Maochun |
| Copyright Year | 2014 |
| Abstract | Nitrogen-doped graphitic porous carbons (NGPCs) have been synthesized by using a zeolite-type nanoscale metal-organic framework (NMOF) as a self-sacrificing template, which simultaneously acts as both the carbon and nitrogen sources in a facile carbonization process. The NGPCs not only retain the nanopolyhedral morphology of the parent NMOF, but also possess rich nitrogen, high surface area and hierarchical porosity with well-conducting networks. The promising potential of NGPCs as metal-free electrocatalysts for oxygen reduction reactions (ORR) in fuel cells is demonstrated. Compared with commercial Pt/C, the optimized NGPC-1000-10 (carbonized at 1000 °C for 10 h) catalyst exhibits comparable electrocatalytic activity via an efficient four-electron-dominant ORR process coupled with superior methanol tolerance as well as cycling stability in alkaline media. Furthermore, the controlled experiments reveal that the optimum activity of NGPC-1000-10 can be attributed to the synergetic contributions of the abundant active sites with high graphitic-N portion, high surface area and porosity, and the high degree of graphitization. Our findings suggest that solely MOF-derived heteroatom-doped carbon materials can be a promising alternative for Pt-based catalysts in fuel cells. |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c4nr00348a |
| PubMed reference number | 24806824 |
| Journal | Medline |
| Volume Number | 6 |
| Issue Number | 12 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C4NR00348A |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/nr/c4/c4nr00348a/c4nr00348a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c4nr00348a |
| Journal | Nanoscale |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
