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Published VersionCC BY V4.0, Open Access
Journal article
Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells
Advanced Science, Vol.6(10), pp.1-8
2019
Abstract
Iron single atom catalysts (Fe SACS) are the best-known nonprecious metal (NPM) catalysts for the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), but their practical application has been constrained by the low Fe SACs loading (<2 wt%). Here, a one-pot pyrolysis method is reported for the synthesis of iron single atoms on graphene (FeSA-G) with a high Fe SAC loading of approximate to 7.7 +/- 1.3 wt%. The as-synthesized FeSA-G shows an onset potential of 0.950 V and a half-wave potential of 0.804 V in acid electrolyte for the ORR, similar to that of Pt/C catalysts but with a much higher stability and higher phosphate anion tolerance. High temperature SiO2 nanopartide-doped phosphoric acid/polybenzimidazole (PA/PBI/SiO2) composite membrane cells utilizing a FeSA-G cathode with Fe SAC loading of 0.3 mg cm(-2) delivers a peak power density of 325 mW cm(-2) at 230 degrees C, better than 313 mW cm(-2) obtained on the cell with a Pt/C cathode at a Pt loading of 1 mg cm(-2). The cell with FeSA-G cathode exhibits superior stability at 230 degrees C, as compared to that with Pt/C cathode. Our results provide a new approach to developing practical NPM catalysts to replace Pt-based catalysts for fuel cells.
Details
- Title
- Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells
- Authors
- Yi Cheng (Corresponding Author) - Central South University, ChinaShuai He (Corresponding Author) - Curtin UniversityShanfu Lu (Author) - Beihang University, ChinaJean-Pierre Veder (Author) - Curtin UniversityBernt Johannessen (Author) - Australian SynchrotronLars Thomsen (Author) - Australian SynchrotronMartin Saunders (Author) - University of Western AustraliaThomas Becker (Author) - Curtin UniversityRoland De Marco (Author) - University of the Sunshine CoastQingfeng Li (Author) - Technology University of Denmark, DenmarkShi-ze Yang (Corresponding Author) - Oak Ridge National Laboratory, United StatesSan Ping Jiang (Corresponding Author)
- Publication details
- Advanced Science, Vol.6(10), pp.1-8
- Publisher
- Wiley - V C H Verlag GmbH & Co. KGaA
- Date published
- 2019
- DOI
- 10.1002/advs.201802066
- ISSN
- 2198-3844; 2198-3844
- Copyright note
- Copyright © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
- Grants
- Organisation Unit
- Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99451506402621
- Output Type
- Journal article
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- Chemistry, Multidisciplinary
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