期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 43, 页码 37079-37086出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b13445
关键词
two-dimensional carbon materials; template-free methods; direct pyrolysis synthesis; graphitic-carbon nitride intermediates; oxygen reduction reaction
资金
- National Natural Science Funds of China [51432003, 51802011, 51125007]
- National Key R&D Program of China [2018YFB0105500]
- Start-Up Fund for Talent Introduction of Beijing University of Chemical Technology [buctrc201806]
- Fundamental Research Funds for the Central Universities [JD 1802]
A direct pyrolysis and template-free synthesis strategy is demonstrated to synthesize the two-dimensional (2-D) Fe/N codoped carbon networks by virtue of 2-D graphitic-carbon nitride (g-C3N4) intermediates derived from melamine. Because of the stabilization and steric hindrance of additional N ligands with bisnitrogen-containing groups (phenanthroline, phthalonitrile, and phenylenediamine), the thin graphitic layered Fe/N codoped carbon materials have successfully inherited the 2-D morphology from the g-C3N4 intermediate after direct carbonization treatment. After the easy removal of inactive Fe particles, the resultant sample exhibits numerous well-dispersed Fe atoms embedded in the carbon layers with a hierarchical (meso- and micro-) porous structure. Owing to the high active site density and open porous structure, the thin graphitic-layered Fe/N codoped carbon electrocatalysts exhibit superior oxygen reduction reaction performance (a half-wave potential of 0.88 V and a kinetics current density of 3.8 mA cm(-2)), even better than the commercial Pt/C catalysts (0.85 V and 1.6 mA cm(-2), respectively). The facile and effective synthesis strategy without template to build the graphene-like nanoarchitectures inherited from the 2-D intermediates will lead to a great development of 2-D carbon materials in various electrochemical applications.
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