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wu, Shun [Verfasser:in]; Liu, Huibin [Verfasser:in]; Lei, Guangyu [Verfasser:in]; He, Hongwei [Verfasser:in]; Wu, Jiawen [Verfasser:in]; Zhang, Guoliang [Verfasser:in]; Zhang, Fengbao [Verfasser:in]; Peng, Wenchao [Verfasser:in]; Fan, Xiaobin [Verfasser:in]; Li, Yang [Verfasser:in]

Single-Atomic Iron-Nitrogen 2d Mof Originated Hierarchically Porous Carbon Catalysts for Enhanced Oxygen Reduction Reaction

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  • Medientyp: E-Book
  • Titel: Single-Atomic Iron-Nitrogen 2d Mof Originated Hierarchically Porous Carbon Catalysts for Enhanced Oxygen Reduction Reaction
  • Beteiligte: wu, Shun [Verfasser:in]; Liu, Huibin [Verfasser:in]; Lei, Guangyu [Verfasser:in]; He, Hongwei [Verfasser:in]; Wu, Jiawen [Verfasser:in]; Zhang, Guoliang [Verfasser:in]; Zhang, Fengbao [Verfasser:in]; Peng, Wenchao [Verfasser:in]; Fan, Xiaobin [Verfasser:in]; Li, Yang [Verfasser:in]
  • Erschienen: [S.l.]: SSRN, [2022]
  • Umfang: 1 Online-Ressource (36 p)
  • Sprache: Englisch
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: The requirement of sustainable energy is of great significance for easing the energy shortage crisis, in which the oxygen reduction reaction (ORR) in metal-air batteries and fuel cells plays a crucial role in efficient energy conversion. The development of noble-metal-free, efficient, and stable ORR electrocatalysts is highly desirable but remains a significant challenge. Herein, we report an atomically dispersed Fe and N co-doped hierarchically porous carbon (Fe-SA/HPC) catalyst derived from two-dimensional leaf-like ZIF-L with preeminent ORR activity. The Fe-SA/HPC catalyst, benefitting from hierarchically porous structure and rich highly-dispersed active sites of FeN x , put up ORR performance with a half-wave potential (E 1/2 ) of 0.91 V vs. the reversible hydrogen electrode (RHE) in 0.1M KOH electrolyte. The current density with a 0.382 mg cm −2 loading of catalyst in a rotating disk electrode (RDE) test can reach 24.65 mA cm −2 at 0.8 V, which is nearly twice that of commercial 20 wt% Pt/C. Density functional theory calculations demonstrate that the co-regulation of defects and graphitic nitrogen can optimize the local electronic redistribution for active sites and endow them with a lower free-energy barrier towards ORR. This work provides certain inspiration for the development of highly reactive atomic metal catalysts through rational topology structure engineering and nitrogen moiety regulation
  • Zugangsstatus: Freier Zugang