Iron single atoms on graphene as nonprecious metal catalysts forhHigh‐temperature polymer electrolyte membrane fuel cells

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dc.contributor.authorCheng, Yen_AU
dc.contributor.authorHe, Sen_AU
dc.contributor.authorLu, SFen_AU
dc.contributor.authorVeder, JPen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorThomsen, Len_AU
dc.contributor.authorSaunders, MJen_AU
dc.contributor.authorBecker, Ten_AU
dc.contributor.authorDe Marco, Ren_AU
dc.contributor.authorLi, QFen_AU
dc.contributor.authorYang, SZen_AU
dc.contributor.authorJiang, SPen_AU
dc.date.accessioned2025-03-06T03:39:08Zen_AU
dc.date.available2025-03-06T03:39:08Zen_AU
dc.date.issued2019-03-13en_AU
dc.date.statistics2024-12-18en_AU
dc.description.abstractIron 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 ≈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 nanoparticle‐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 °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 °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. © 1999-2024 John Wiley & Sons, Inc or related companies. © 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.en_AU
dc.description.sponsorshipThis research was supported by the Australian Research Council Discovery Project Funding Scheme (project number: DP150102044, DP180100731 and DP180100568). The authors acknowledge the facilities, and the scientific and technical assistance of microscopy Australia at the Centre for Microscopy, Characterization & Analysis, the University of Western Australia, and the WA X-ray Surface Analysis Facility, funded by an Australian Research Council LIEF grant (LE120100026), and the FEI Talos F200X FEG-TEM with Super-X EDS system at the John de Laeter Centre, Curtin University. NEXAFS and XAS measurements were performed on the soft X-ray and XAS beamlines of the Australian Synchrotron, Victoria, Australia, part of ANSTO. The electron microscopy carried out at ORNL (S.Z.Y.) was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering and through a user proposal supported by ORNL's Center for Nanophase Materials Sciences, which is sponsored by the Scientific User Facilities Division of U.S. Department of Energy.en_AU
dc.format.mediumElectronic-eCollectionen_AU
dc.identifier.citationCheng, Y., He, S., Lu, S., Veder, J.-P., Johannessen, B., Thomsen, L., Saunders, M., Becker, T., De Marco, R., Li, Q., Yang, S.-z., & Jiang, S. P. (2019). Iron single atoms on graphene as nonprecious metal catalysts for high-temperature polymer electrolyte membrane fuel cells. Advanced Science, 6(10), 1802066. doi:10.1002/advs.201802066en_AU
dc.identifier.issn2198-3844en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleAdvanced Scienceen_AU
dc.identifier.pagination1802066-en_AU
dc.identifier.urihttps://doi.org/10.1002/advs.201802066en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16018en_AU
dc.identifier.volume6en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherWileyen_AU
dc.subjectAtomsen_AU
dc.subjectGrapheneen_AU
dc.subjectMetalsen_AU
dc.subjectCatalystsen_AU
dc.subjectElectrolytesen_AU
dc.subjectMembranesen_AU
dc.subjectPolymersen_AU
dc.subjectTemperature rangeen_AU
dc.subjectFuel cellsen_AU
dc.titleIron single atoms on graphene as nonprecious metal catalysts forhHigh‐temperature polymer electrolyte membrane fuel cellsen_AU
dc.typeJournal Articleen_AU
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