期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 41, 期 47, 页码 22026-22033出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.08.069
关键词
BN-doped graphene; Microwave-hydrothermal; Catalyst; Oxygen reduction reaction; Electrocatalyst
资金
- MSIP (Ministry of Science, ICT and Future Planning), Korea, under the IT Consilience Creative Program [IITP-2015-R0346-15-1008]
In this study, a facile microwave-hydrothermal method was successfully applied to synthesize boron and nitrogen co-doped graphene (BNG) electrocatalyst for the oxygen reduction reaction (ORR). It consists of an efficient two-step process involving simultaneous doping with different heteroatoms (B and N) and reduction of doped graphene oxide. It was found that the B and N contents of highly reduced BN co-doped graphene (HRBNG) are 3.55 and 4.43 at%, respectively. The HRBNG exhibited clearly enhanced electrocatalytic activity towards the ORR in alkaline electrolytes. The electron transfer number (n) was obtained 3.53 similar to 3.84 in potential range of 0.465 V-0.225 V, indicating that the HRBNG favors the four-electron pathway for the reduction of oxygen. These results demonstrate that the synthesized HRBNG has potential to replace expensive precious metal catalysts and also provide a new strategy to synthesize heteroatom-doped graphene-based catalyst. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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