Hollow Spheres of Iron Carbide Nanoparticles Encased in Graphitic Layers as Oxygen Reduction Catalysts
- Authors:
-
-
Hu, Yang
;
Close
0000-0001-8644-9615
Department of Energy Conversion and Storage, Technical University of Denmark -
Jensen, Jens Oluf
;
Close0000-0002-2427-7763
Department of Energy Conversion and Storage, Technical University of Denmark - Zhang, Wei ;
-
Cleemann, Lars Nilausen
;
Close0000-0001-5840-7477
Department of Energy Conversion and Storage, Technical University of Denmark - Xing, Wei ;
-
Bjerrum, Niels J.
;
Close0000-0001-7241-4091
Department of Energy Conversion and Storage, Technical University of Denmark -
Li, Qingfeng
Close0000-0002-5460-055X
Department of Energy Conversion and Storage, Technical University of Denmark
-
Hu, Yang
;
- DOI:
- 10.1002/anie.201400358
- Abstract:
- Nonprecious metal catalysts for the oxygen reduction reaction are the ultimate materials and the foremost subject for low‐temperature fuel cells. A novel type of catalysts prepared by high‐pressure pyrolysis is reported. The catalyst is featured by hollow spherical morphologies consisting of uniform iron carbide (Fe3C) nanoparticles encased by graphitic layers, with little surface nitrogen or metallic functionalities. In acidic media the outer graphitic layers stabilize the carbide nanoparticles without depriving them of their catalytic activity towards the oxygen reduction reaction (ORR). As a result the catalyst is highly active and stable in both acid and alkaline electrolytes. The synthetic approach, the carbide‐based catalyst, the structure of the catalysts, and the proposed mechanism open new avenues for the development of ORR catalysts.
- Type:
- Journal article
- Language:
- English
- Published in:
- Angewandte Chemie (international Edition), 2014, Vol 53, Issue 14
- Main Research Area:
- Science/technology
- Publication Status:
- Published
- Review type:
- Peer Review
- Submission year:
- 2014
- Scientific Level:
- Scientific
- ID:
- 260911288
