A novel Fe3O4 nanoparticles/nitrogen‐doped graphene aerogel (denoted as Fe3O4@NGA) hybrid material with high porosity was prepared by using iron‐based metal‐organic frameworks (MOFs), [Fe3O(H2N‐BDC)3] (H2N‐BDC=2‐aminoterephtalic acid), denoted as MIL‐88B‐NH2, as templates and nitrogen‐doped graphene aerogel (NGA) as the substrate. The obtained Fe3O4 nanoparticles demonstrate a rich edge area with abundant exposed active sites and defects, indicating great potential for oxygen adsorption and activation. When used as an electrocatalyst in alkaline solution, the Pt‐free Fe3O4@NGA exhibited excellent oxygen reduction reaction (ORR) performance and dramatically enhanced durability and tolerance towards methanol compared to commercial Pt/C catalyst, revealing its great viability and potential in practical application.
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Liang et al. (2017) studied this question.
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