Graphene and other two-dimensional materials have been used as catalysts in the oxygen reduction reaction (ORR) in fuel cells with a few limitations in terms of the onset potential and number of electrons transferred per oxygen molecule. We find that heavily nitrogenated graphene with a nitrogen content of 14-18 wt.% and a high proportion of pyrrolic nitrogen, prepared under microwave irradiation, shows excellent activity towards ORR, comparable to platinum, with the transferred electron number of 4.
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Bar Ilan Univ, Bar Ilan Ctr Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, IsraelBar Ilan Univ, Bar Ilan Ctr Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, Israel
Mizrahi, Michal
Levy, Naomi
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Bar Ilan Univ, Bar Ilan Ctr Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, IsraelBar Ilan Univ, Bar Ilan Ctr Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, Israel
Levy, Naomi
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Zion, Noam
Zachman, Michael
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Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USABar Ilan Univ, Bar Ilan Ctr Nanotechnol & Adv Mat, IL-5290002 Ramat Gan, Israel