Functionalization of nanocarbon materials with heteroatoms is of paramount interest as doping of carbon with electron withdrawing groups results in change of electrochemical properties of the potential catalyst. Adding fluorine, as the most electronegative element into the doping process next to boron is expected to have significant effect on the design of novel nanocarbon‐based electrocatalysts. In this paper boron and fluorine co‐doped reduced graphene oxide/few‐walled carbon nanotube (BF‐rGO/FWCNT) catalyst are synthesized via simple and low‐cost direct pyrolysis method using boron trifluoride diethyl etherate (BTDE). Composition analysis confirmed that boron and fluorine have been grafted onto the carbon support. Rotating disk electrode (RDE) measurements revealed that BF‐rGO/FWCNT has remarkable electrocatalytic activity toward the oxygen reduction reaction (ORR) both in alkaline and acid media. The onset potential of the best BF‐rGO/FWCNT catalyst was 50 mV more positive in alkaline and 600 mV more positive in acidic media compared with un‐doped rGO/FWCNT. The half‐wave potential was 100 mV more positive in alkaline media and 700 mV more positive in acidic media in comparison with un‐doped rGO/FWCNT.

中文翻译：

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硼氟共掺杂石墨烯/少壁碳纳米管复合材料作为高活性氧还原反应电催化剂

具有杂原子的纳米碳材料的官能化是最受关注的，因为用吸电子基团掺杂碳会导致潜在催化剂的电化学性质的变化。添加氟作为掺杂过程中仅次于硼的电负性最强的元素，预计将对新型纳米碳基电催化剂的设计产生重大影响。本文利用三氟化硼二乙醚（BTDE）通过简单且低成本的直接热解法合成了硼和氟共掺杂还原氧化石墨烯/少壁碳纳米管（BF-rGO/FWCNT）催化剂。成分分析证实硼和氟已接枝到碳载体上。旋转盘电极（RDE）测量表明，BF-rGO/FWCNT 在碱性和酸性介质中对氧还原反应（ORR）均具有显着的电催化活性。与未掺杂的 rGO/FWCNT 相比，最佳 BF-rGO/FWCNT 催化剂的起始电位在碱性介质中高出 50 mV，在酸性介质中高出 600 mV。与未掺杂的 rGO/FWCNT 相比，碱性介质中的半波电位高出 100 mV，酸性介质中的半波电位高出 700 mV。