Nitrogen, Fluorine co-doped Silk-derived Carbon for Electrochemical Oxygen Reduction with High Performance in Alkaline Solution
- 2016年第22卷 
本文通过水热预处理，利用热解工艺从蚕茧中成功的制备了一种高性能的掺杂碳基催化剂. 研究了制备条件及氟原子掺杂对催化剂性能的影响. 在最优化条件下制备出的氮氟共掺杂碳基催化剂具有超过1000 m2•g-1的比表面积，N元素和F元素含量可达3.5 %及7.3 %. 在碱性条件下，所制备的催化剂具有可与商业铂碳催化剂相媲美的氧还原催化活性，同时展示出优异的抗甲醇中毒性能及稳定性. F原子的掺杂对催化剂性能的提高效果显著.A high-performance, doped carbon-based catalyst was synthesized by pyrolyzing hydrothermally treated silkworm cocoon. The effects of preparation conditions and fluorine promotion on various catalysts’ performance were investigated. The catalyst prepared under optimal conditions and doped with nitrogen and fluorine possessed the high specific surface area of more than 1000 m2•g-1 and contained 3.5 and 7.3% (by mass, the same below) N and F, respectively. The activity of the catalyst toward oxygen reduction reaction in an alkaline medium was comparable to that of commercial Pt/C, showing both superior tolerance to methanol poisoning and better durability. Doping with fluorine was found to significantly enhance the performance of catalyst. Possible mechanism for the addition of fluorine is suggested.