Abstract
CO catalytic oxidation on the two-dimensional (2D) Fe/N X clusters embedded graphene (G) (X = 4, 3, 2, 1) with D 4h, C 2v, C 2h, and C S symmetries is investigated using the first-principle method. Fe/N2-G system with C 2h symmetry facilitates the O2 adsorption. The strong interaction between the Fe atom and O2 in Fe/N2-G system can be contributed from the high energy of Fe’s \(d_z^2\) orbit. The CO oxidation reaction on Fe/N2-G system has a small energy barrier (0.43 eV) by the Langmuir–Hinshelwood (LH) mechanism (CO + O2 → OOCO → CO2 + Oads), which would be useful in evaluating the reactivity of Fe catalyst and serving as a good candidate for efficient non-noble metal catalyst. The results provide valuable guidance on selecting catalysts of low cost and superior activity to fabricate graphene-based materials.
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The research was supported by the National Natural Science Foundation of China under Grant No.61674053, U1404109, and 11504334. The calculations are also supported by The High Performance Computing Center of Henan Normal University.
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Zhao, M.Y., Zhao, R.M., Niu, M.M. et al. Promotion of CO oxidation on the Fe/N X clusters embedded graphene. Appl. Phys. A 123, 199 (2017). https://doi.org/10.1007/s00339-017-0820-x
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DOI: https://doi.org/10.1007/s00339-017-0820-x