A mesoporous carbon derived from 4,4′-dipyridyl iron as an efficient catalyst for oxygen reduction

作者：Gao, Xiaohong; Li, Xiaobao; Wang, Qingqing; You, Chenghang^*; Tian, Xinlong^*; Wang, Chongtai; Hua, Yingjie; Liao, Shijun

来源：Journal of Materials Chemistry A, 2020, 8(5): 2439-2444.

DOI：10.1039/c9ta13033k

• DOPED CARBON
• ACTIVE-SITES
• UNIFORM NITROGEN
• PERFORMANCE
• AIR
• ELECTROCATALYSTS

Developing highly active and low cost catalysts for oxygen reduction is crucial for the commercialization of advanced energy systems. In this work, a mesoporous carbon was fabricated through a simple pyrolysis procedure by using 4 ' 4-bipyridyl, FeCl3 and SBA-15 as the precursors and templates, respectively. The catalyst exhibits rather high ORR performance, with a half-wave potential of 0.906 V (vs. RHE). The catalyst also demonstrates outstanding stability, excellent methanol tolerance and high selectivity towards the four-electron path. The air electrode fabricated by using the catalyst can enable a zinc-air battery to deliver a specific capacity of 815.6 mA h g(Zn)(-1) and a maximum power density of 196.3 mW cm(-2), which are among the highest values recently reported, to our knowledge. By comparing the catalysts obtained at different temperatures, we found that the increased graphitic N content together with the higher surface area should be the reasonable origins of the outstanding performance.

• 单位
  海南大学; 海南师范大学