期刊
CARBON
卷 99, 期 -, 页码 272-279出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.12.034
关键词
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资金
- National Science Foundation of China (NSFC) [21276098, 21476088, 51302091, U1301245]
- Ministry of Science and Technology of China [2012AA053402]
- Guangdong Natural Science Foundation [S2012020011061]
- Department of Education of Guangdong Province [2013CXZDA003]
Reduced graphene oxide co-doped with nitrogen and fluorine (N-F/rGO) was successfully prepared by a simple one-step thermal annealing process using a mixture of graphene oxide and ammonium fluoride in an argon atmosphere. X-ray photoelectron spectroscopy demonstrated that the nitrogen and fluorine atoms were successfully doped into the rGO structure at atomic percentages of 2.51 and 0.74, respectively. Nitrogen adsorption-desorption measurement revealed that the as-prepared N-F/rGO has a high surface area (412 m(2) g(-1)) with numerous slit-shaped pores (1.60 cm(3) g(-1)). The electrocatalytic activity of N-F/rGO for oxygen reduction reaction was found to be higher than that of rGO doped only with nitrogen (N-F/rGO); in fact, it was comparable to the activity of conventional commercial Pt/C in an alkaline electrolyte. In addition, the catalyst exhibited excellent long-term stability/durability, good methanol tolerance, and high selectivity for the four-electron transfer pathway. A possible mechanism is suggested for the improvement conferred by fluorine. (C) 2015 Elsevier Ltd. All rights reserved.
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