Simultaneous doping of nitrogen and fluorine into reduced graphene oxide: A highly active metal-free electrocatalyst for oxygen reduction
Simultaneous doping of nitrogen and fluorine into reduced graphene oxide: A highly active metal-free electrocatalyst for oxygen reduction
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将氮和氟同时掺杂到还原氧化石墨烯中：一种用于氧还原的高活性无金属电催化剂
DOI：
10.1016/j.carbon.2015.12.034
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发表时间：
2016-04-01
期刊：
影响因子：
10.9
通讯作者：
Li, Xiuhua
中科院分区：
文献类型：
--
作者：
Qiao, Xiaochang;Liao, Shijun;Li, Xiuhua
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.
