Publicación: Self-Standing Nanofiber Electrodes with Pt–Co Derived from Electrospun Zeolitic Imidazolate Framework for High Temperature PEM Fuel Cells
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Fecha
2021
Autores
Lim, Sung Yul
Gao, Guohua
Dou, Yibo
Bredmose Simonsen, Søren
Jensen, Jens Oluf
Li, Qingfeng
Norrman, Kion
Jing, Shao
Zhang, Wenjing
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info:eu-repo/semantics/openAccess
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Wiley
Resumen
Expedited conversion of O2 to H2O with minimal amounts of Pt is essential for wide applicability of PEM fuel cells (PEMFCs). Therefore, it is imperative to develop a process for catalyst management to circumvent unnecessary catalyst loss while improving the Pt utilization, catalytic activity, and durability. Here, the fabrication of a self-standing nanofiber electrode is demonstrated by employing electrospinning. This film-type catalyst simultaneously contains Pt–Co alloy nanoparticles and Co embedded in an N-doped graphitized carbon (Co–Nx) support derived from the electrospun zeolitic imidazolate frameworks. Notably, the flexible electrode is directly transferrable for the membrane-electrode assembly of high temperature PEMFC. In addition, the electrodes exhibit excellent performance, maybe owing to the synergistic interaction between the Pt–Co and Co–Nx as revealed by the computational modeling study. This method simplifies the fabrication and operation of cell device with negligible Pt loss, compared to ink-based conventional catalyst coating methods.
Descripción
The registered version of this article, first published in “Advanced Functional Materials, vol31", is available online at the publisher's website: Wiley, https://doi.org/10.1002/adfm.202006771
La versión registrada de este artículo, publicado por primera vez en “Advanced Functional Materials, vol31", está disponible en línea en el sitio web del editor: Wiley, https://doi.org/10.1002/adfm.202006771
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Citación
Sung Yul Lim, Santiago Martin, Guohua Gao, Yibo Dou, Søren Bredmose Simonsen, Jens Oluf Jensen, Qingfeng Li, Kion Norrman, Shao Jing, Wenjing Zhang, Self-Standing Nanofiber Electrodes with Pt–Co Derived from Electrospun Zeolitic Imidazolate Framework for High Temperature PEM Fuel Cells, Advanced Functional Materials, 31, 2021, 2006771; DOI: https://doi.org/10.1002/adfm.202006771
Centro
Facultades y escuelas::Facultad de Ciencias
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