文献类型：期刊文献

英文题名：Efficient approach to iron/nitrogen co-doped graphene materials as efficient electrochemical catalysts for the oxygen reduction reaction

作者：Dong, Qingqing[1,2];Zhuang, Xiaodong[2];Li, Zhi[1];Li, Bin[1];Fang, Bin[1];Yang, Cunzhong[1];Xie, Haifen[1];Zhang, Fan[2];Feng, Xinliang[2,3]

机构：[1]E China Univ Sci & Technol, Inst Nucl Technol & Applicat, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;[3]Tech Univ Dresden, D-01062 Dresden, Germany

年份：2015

卷号：3

期号：15

起止页码：7767

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20151500729493);WOS:【SCI-EXPANDED(收录号:WOS:000352441100013)】；

基金：This work was financially supported by the National Basic Research Program of China (973 Program: 2013CBA01602, 2012CB933404), the Natural Science Foundation of China (21174083, 51403126 and 21102091), the Shanghai Pujiang Program (12PJ1405300), and Shanghai Jiao Tong University (211 Project), and the Ph.D. Programs Foundation of the Ministry of Education of the People's Republic of China for Young Scholars (20110073120039).

语种：英文

外文关键词：Iron compounds - Electron transitions - Iron - Electrolytic reduction - Organometallics - Oxygen - Potassium hydroxide

摘要：Cyclopentadienyliron (CpFe) groups have been successfully attached on the surface of reduced graphene oxide (rG) by a ligand-exchange reaction of ferrocene (Cp2Fe) and rG to produce CpFe-modified reduced graphene oxide (rGFeCp), which exhibits good processability in many organic solvents. In a similar one-pot reaction, graphite was efficiently exfoliated using Cp2Fe as the intercalator to form CpFe-attached freestanding graphene nanosheets (GFeCp, similar to 10 layers). Upon pyrolysis and ammonia activation, rGFeCp and GFeCp were converted to iron/nitrogen co-doped porous graphenes, namely, rGFe-800a and GFe800a, respectively. The obtained rGFe-800a exhibited good electrochemical performance for the oxygen reduction reaction (ORR) under alkaline conditions (0.1 M KOH) with a low half-wave potential at -0.29 V, a dominant four-electron transfer mechanism (n = 3.5 at -1.0 V), and a maximum diffusion-limiting current density of 4.86 mA cm(-2). In addition, rGFe-800a showed excellent methanol tolerance, superior to that of commercial 20% Pt/C. The effect of iron/nitrogen co-doping plays a key role in the good ORR activities of the as-prepared materials.