On the structural composition and stability of Fe-N-C catalysts prepared by an intermediate acid leaching

被引：41
作者：
Kramm, Ulrike I. [1 ,4 ,5 ,6 ]
Zana, Alessandro [2 ]
Vosch, Tom [2 ]
Fiechter, Sebastian
Arenz, Matthias [2 ,3 ]
Schmeisser, Dieter [1 ]
机构：
[1] BTU Cottbus Senftenberg, Dept Phys, Konrad Wachsmann Allee 17, D-03046 Cottbus, Germany
[2] Univ Copenhagen, Dept Chem, Nanosci Ctr, Univ Parken 5, DK-2100 Copenhagen, Denmark
[3] Helmholtz Ctr Berlin, Inst Solar Fuels, Lise Meitner Campus,Hahn Meitner Pl 1, D-14109 Berlin, Germany
[4] Tech Univ Darmstadt, Grad Sch Excellence Energy Sci & Engn, Dept Chem, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany
[5] Tech Univ Darmstadt, Dept Mat, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany
[6] Tech Univ Darmstadt, Dept Earth Sci, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2016年 / 20卷 / 04期
关键词：
Non-noble metal catalysts (NNMC); Fe-N-C; ORR; PEM-FC Accelerated stress tests (ASTs); Mossbauer spectroscopy; OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORK; PEM FUEL-CELL; FE/N/C-CATALYSTS; CATHODE CATALYST; O-2; REDUCTION; ACTIVE-SITES; IL-TEM; ELECTROCATALYSTS; IRON;
D O I：
10.1007/s10008-015-3060-z
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The development of highly active and stable non-noble metal catalysts (NNMC) for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEM-FC) becomes of importance in order to enable cost reduction. In this work, we discuss the structural composition as derived from Fe-57 Mossbauer spectroscopy and X-ray diffraction, catalytic performance determined by a rotating (ring) disk electrode (RRDE) technique and stability evaluation of our Fe-N-C catalysts prepared by an intermediate acid leaching (IAL), The advantage of this IAL is given by a high density of active sites within the catalyst, as even without sulphur addition, an iron carbide formation and related disintegration of active sites are inhibited. In addition, our accelerated stress tests illustrate better stability of the sulphur-free IAL catalyst in comparison to the sulphur-added one.
引用
收藏
页码：969 / 981
页数：13
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