کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6471361 | 1424127 | 2017 | 8 صفحه PDF | دانلود رایگان |
- Fe,N-doped carbon aerogels (CAs) were prepared by pyrolysis of organic aerogels.
- ORR activity of CAs in alkaline solution increased with N and Fe content.
- ORR activity of CAs was decreased by blocking the Fe-containing centres with cyanide.
- Fe,N-doped CAs are suitable cathode materials for alkaline membrane fuel cells
Iron-containing nitrogen-doped carbon aerogels (CAs) were prepared by pyrolysis of organic aerogels of variable composition synthesised from melamine, 5-methylresorcinol and 2,6-dihydroxy-4-methylbenzoic acid. The structure and composition of the catalyst materials were characterised by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, atomic absorption spectroscopy and N2-adsorption analysis. The electrocatalytic activity of CAs for oxygen reduction reaction (ORR) was evaluated using the rotating disk electrode (RDE) method in alkaline solution and increase of the ORR activity with increasing the nitrogen and iron content was revealed. Low peroxide production on Fe-containing N-doped CA-based catalysts and their high methanol tolerance suggest that these could be suitable cathode catalysts for alkaline fuel cells.
Journal: Electrochimica Acta - Volume 230, 10 March 2017, Pages 81-88