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Hierarchically porous Fe/N–C hollow spheres derived from melamine/Fe-incorporated polydopamine for efficient oxygen reduction reaction electrocatalysis
| Content Provider | Semantic Scholar |
|---|---|
| Author | Feng, Bomin Wu, Xiuju Niu, Yanli Li, Wenqiang Yao, Yunxi Hu, Weihua Li, Chang Ming |
| Copyright Year | 2019 |
| Abstract | Fe/N–C catalysts show great potential for the oxygen reduction reaction (ORR) but their catalytic activity should be further improved for practical application. Here, we report a high performance Fe/N–C hollow sphere with excellent ORR activity in both alkaline and acidic solutions. It is synthesized via pyrolysis of a melamine/Fe-incorporated polydopamine nanosphere precursor at 800 °C in an argon atmosphere. The N-rich melamine in the precursor affords abundant N dopants to form dense Fe–Nx active sites and also facilitates the formation of micropores in the catalyst via the gasification effect, together improving the ORR activity. The as-reported Fe/N–C catalyst outperforms the Pt/C catalyst in basic media (45 mV more positive half wave potential), approaches the Pt/C catalyst in acidic media (55 mV lower half wave potential), and exhibits impressive performance in Zn–air primary batteries. |
| Starting Page | 3455 |
| Ending Page | 3461 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c9se00686a |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c9/se/c9se00686a/c9se00686a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c9se00686a |
| Volume Number | 3 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
