Due
to the scarcity and high cost of precious metals, the hydrogen
economy would ultimately rely on non-platinum-group-metal (non-PGM)
catalysts. The non-PGM-catalyzed oxygen reduction reaction, which
is the bottleneck for the application of hydrogen fuel cells, is challenging
because of the limited activity and durability of non-PGM catalysts.
A stabilized single-atom catalyst may be a possible solution to this
issue. In this work, we employ a coordination-assisted polymerization
assembly strategy to synthesize an atomic Fe and N co-doped ordered
mesoporous carbon nanosphere (denoted as meso-Fe–N–C).
The meso-Fe–N–C possesses a hierarchical structure with
a high surface area of 494.7 m2 g–1 as
well as a high dispersion of Fe (2.9 wt %) and abundant N (4.4 wt
%). With these beneficial structural properties, the meso-Fe–N–C
exhibits excellent activity and durability toward the oxygen reduction
reaction, outperforming the state-of-the-art Pt/C electrocatalysts.
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