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Molecule-level g-C3N4 coordinated transition metals as a new class of electrocatalysts for oxygen electrode reactions
journal contribution
posted on 2017-03-08, 00:00 authored by Y Zheng, Y Jiao, Y Zhu, Qiran CaiQiran Cai, A Vasileff, Luhua LiLuhua Li, Y Han, Ying (Ian) ChenYing (Ian) Chen, S-Z QiaoOrganometallic complexes with metal-nitrogen/carbon (M-N/C) coordination are the most important alternatives to precious metal catalysts for oxygen reduction and evolution reactions (ORR and OER) in energy conversion devices. Here, we designed and developed a range of molecule-level graphitic carbon nitride (g-C3N4) coordinated transition metals (M-C3N4) as a new generation of M-N/C catalysts for these oxygen electrode reactions. As a proof-of-concept example, we conducted theoretical evaluation and experimental validation on a cobalt-C3N4 catalyst with a desired molecular configuration, which possesses comparable electrocatalytic activity to that of precious metal benchmarks for the ORR and OER in alkaline media. The correlation of experimental and computational results confirms that this high activity originates from the precise M-N2 coordination in the g-C3N4 matrix. Moreover, the reversible ORR/OER activity trend for a wide variety of M-C3N4 complexes has been constructed to provide guidance for the molecular design of this promising class of catalysts.
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Journal of the American Chemical SocietyVolume
139Issue
9Pagination
3336 - 3339Publisher
American Chemical SocietyLocation
Washington D.C.Publisher DOI
eISSN
1520-5126Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2017, American Chemical SocietyUsage metrics
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