期刊
CARBON
卷 125, 期 -, 页码 401-408出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2017.09.085
关键词
-
资金
- National Key Research and Development Program of China [2016Y FB0101310]
The controllable synthesis of single nitrogen (N) type doped carbon nanomaterials (CNMs) is of significant importance to evaluate the effects of different N types on electro-catalytic activity for oxygen reduction reaction (ORR) in experiment. Herein, the chaotic edge planes of the as-synthesized platelet carbon nanofibers (plCNFs) are tailored by acid etching of HF to obtain abundant exposed active edge sites while maintaining the interior graphene patterns intact. The N bonding configuration belonging to pyridinic type is nearly 100% and the concentration of the pyridinic-N in the tailored plCNFs reaches up to 12.61 at.%. Electrochemical tests show that N-plCNFs (HF) exhibits improved ORR activities compared with N-plCNFs and the carbon atoms adjacent to pyridinic-N could be the catalytic active sites for ORR. In addition, the generation mechanism of pyridinic-N in tailored plCNFs is briefly elaborated. (C) 2017 Elsevier Ltd. All rights reserved.
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