Journal
CATALYSTS
Volume 5, Issue 3, Pages 1574-1602Publisher
MDPI
DOI: 10.3390/catal5031574
Keywords
nitrogen-doped carbon nanotubes; nitrogen-doped graphene; metal-free catalysts; ORR
Categories
Funding
- Natural Science Foundations of China
- Natural Science Foundation of Shanxi Province
- Fonds de Recherche du Quebec-Natureet Technologies (FRQNT)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Institut National de la Recherche Scientifique (INRS)
- Centre Quebecois sur les MateriauxFonctionnels (CQMF)
- China Scholarship Council (CSC)
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Nitrogen-doped carbon materials, including nitrogen-doped carbon nanotubes (NCNTs) and nitrogen-doped graphene (NG), have attracted increasing attention for oxygen reduction reaction (ORR) in metal-air batteries and fuel cell applications, due to their optimal properties including excellent electronic conductivity, 4e(-) transfer and superb mechanical properties. Here, the recent progress of NCNTs- and NG-based catalysts for ORR is reviewed. Firstly, the general preparation routes of these two N-doped carbon-allotropes are introduced briefly, and then a special emphasis is placed on the developments of both NCNTs and NG as promising metal-free catalysts and/or catalyst support materials for ORR. All these efficient ORR electrocatalysts feature a low cost, high durability and excellent performance, and are thus the key factors in accelerating the widespread commercialization of metal-air battery and fuel cell technologies.
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