First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells

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dc.contributor.authorCheng, Yen_AU
dc.contributor.authorWang, MGen_AU
dc.contributor.authorLu, SFen_AU
dc.contributor.authorTang, CJen_AU
dc.contributor.authorWu, Xen_AU
dc.contributor.authorVeder, JPen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorThomsen, Len_AU
dc.contributor.authorZhang, Jen_AU
dc.contributor.authorYang, SZen_AU
dc.contributor.authorWang, SGen_AU
dc.contributor.authorJiang, SPen_AU
dc.date.accessioned2025-12-18T05:18:34Zen_AU
dc.date.available2025-12-18T05:18:34Zen_AU
dc.date.issued2021-05-05en_AU
dc.date.statistics2025-04-15en_AU
dc.description.abstractPhosphate poisoning of Pt electrocatalysts is one of the major barriers that constrains the performance of phosphoric acid-doped polybenzimidazole (PA/PBI) membrane fuel cells. Herein, we developed new atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs) as Pt-free oxygen reduction reaction (ORR) electrocatalysts. The cell with FeCu/N-CNTs cathodes delivers a peak power density of 302 mWcm−2 at 230℃, similar to that using Pt/C electrocatalysts (1 mgPt cm−2) but with a much better stability. In contrast to phosphate poisoning of Pt/C, FeCu/N-CNTs show PA enhanced activities. DFT calcualtions indicate that phosphate promotion effect results from the stronger binding of phosphate on Cu sites, which decreases the activation energy barrier for the cleavage of the O2 double bond and provides local protons to facilitate the proton-coupled electron transfer ORR. The results also show that FeCu/N-CNTs have a much better activity for ORR as comapre to Fe single atom catalysts coordinated with nitrogen-doped carbon nanotubes, Fe/N-CNTs. This study demonstrates the promising potential of bimetallic FeCu/N-CNTs as true Pt-free, highly active and durable cathodes for PA/PBI based high temperature polymer electrolyte fuel cells. © 2020 Elsevier B.V.en_AU
dc.description.sponsorshipThis research was supported by the Australian Research Council under Discovery Project Funding Scheme (project number: DP180100731 and DP180100568). The authors acknowledge the facilities and the scientific and technical assistance at the Centre for Microscopy, Characterization & Analysis, the University of Western Australia, the WA X-Ray Surface Analysis Facility (project number: ARC LE120100026), and the John de Laeter Centre, Curtin University.en_AU
dc.identifier.articlenumber119717en_AU
dc.identifier.citationCheng, Y., Wang, M., Lu, S., Tang, C., Wu, X., Veder, J.-P., Johannessen, B., Thomsen, L., Zhang, J., Yang, S.-z., Wang, S., & Jiang, S. P. (2021). First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells. Applied Catalysis B: Environmental, 284, 119717. doi:10.1016/j.apcatb.2020.119717en_AU
dc.identifier.issn0926-3373en_AU
dc.identifier.journaltitleApplied Catalysis B Environment and Energyen_AU
dc.identifier.urihttps://doi.org/10.1016/j.apcatb.2020.119717en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16802en_AU
dc.identifier.volume284en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPhosphatesen_AU
dc.subjectCatalystsen_AU
dc.subjectIronen_AU
dc.subjectCopperen_AU
dc.subjectPhosphoric aciden_AU
dc.subjectTemperature rangeen_AU
dc.subjectDoped materialsen_AU
dc.subjectCathodesen_AU
dc.subjectElectrocatalystsen_AU
dc.subjectActivation energyen_AU
dc.subjectHydrogenen_AU
dc.titleFirst demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cellsen_AU
dc.typeJournal Articleen_AU
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