A mesoporous carbon derived from 4, 4′-dipyridyl iron as an efficient catalyst for oxygen reduction. Issue 5 (17th January 2020)

• Record Type: Journal Article
• Authors: Gao, Xiaohong; Li, Xiaobao; Wang, Qingqing; You, Chenghang; Tian, Xinlong; Wang, Chongtai; Hua, Yingjie; Liao, Shijun
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 5(2020)
• Page Start: 2439
• Page End: 2444
• Publication Date: 2020-01-17
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta13033k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : An ultra-high performance ORR catalysts derived from 4, 4′-dipyridyl. Abstract : 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 gZn −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.