期刊
MATERIALS
卷 8, 期 10, 页码 6658-6667出版社
MDPI AG
DOI: 10.3390/ma8105331
关键词
oxygen reduction reaction; Pt-free; Ipomoea aquatic; biomass
类别
资金
- Natural Science Fund of China [NSFC21273292]
- Basic and Frontier Research Program of Chongqing Municipality [CSTC2014jcyjA50038]
- Talent Introduction Project of Chongqing University of Arts and Sciences [R2014CJ02]
The development of inexpensive and active Pt-free catalysts as an alternative to Pt-based catalysts for oxygen reduction reaction (ORR) is an essential prerequisite for fuel cell commercialization. In this paper, we report a strategy for the design of a new Fe-N/C electrocatalyst derived from the co-pyrolysis of Ipomoea aquatica biomass, carbon black (Vulcan XC-72R) and FeCl(3)6H(2)O at 900 degrees C under nitrogen atmosphere. Electrochemical results show that the Fe-N/C catalyst exhibits higher electrocatalytic activity for ORR, longer durability and higher tolerance to methanol compared to a commercial Pt/C catalyst (40 wt %) in an alkaline medium. In particular, Fe-N/C presents an onset potential of 0.05 V (vs. Hg/HgO) for ORR in an alkaline medium, with an electron transfer number (n) of 3.90, which is close to that of Pt/C. Our results confirm that the catalyst derived from I. aquatica and carbon black is a promising non-noble metal catalyst as an alternative to commercial Pt/C catalysts.
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