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ACS Appl Mater Interfaces. 2017 Jan 11;9(1):398-405. doi: 10.1021/acsami.6b12547. Epub 2016 Dec 27.

S, N Dual-Doped Graphene-like Carbon Nanosheets as Efficient Oxygen Reduction Reaction Electrocatalysts.

Author information

1
Centre for Composite Materials and Structures, Harbin Institute of Technology , Harbin 150080, China.
2
Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University , Dalian 116028, China.
3
School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin 150080, China.
4
Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology , Harbin 150080, China.
5
Department of Physics, Harbin Institute of Technology , Harbin 150080, China.

Abstract

Replacement of rare and precious metal catalysts with low-cost and earth-abundant ones is currently among the major goals of sustainable chemistry. Herein, we report the synthesis of S, N dual-doped graphene-like carbon nanosheets via a simple pyrolysis of a mixture of melamine and dibenzyl sulfide as efficient metal-free electrocatalysts for oxygen reduction reaction (ORR). The S, N dual-doped graphene-like carbon nanosheets show enhanced activity toward ORR as compared with mono-doped counterparts, and excellent durability in contrast to the conventional Pt/C electrocatalyst in both alkaline and acidic media. A high content of graphitic-N and pyridinic-N is necessary for ORR electrocatalysis in the graphene-like carbon nanosheets, but an appropriate amount of S atoms further contributes to the improvement of ORR activity. Superior ORR performance from the as-prepared S, N dual-doped graphene-like carbon nanosheets implies great promises in practical applications in energy devices.

KEYWORDS:

S, N-doped carbon; electrocatalysis; graphene-like; metal-free; oxygen reduction reaction

PMID:
27983785
DOI:
10.1021/acsami.6b12547

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