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Title: Redox-Active Metal-Organic Composites for Highly Selective Oxygen Separation Applications

Incorporating, a redox active organometallic molIncorporating, a redox active organometallic molecule within a porous matrix is a useful strategy to form redox active composite materials for emerging applications such as energy storage, electro-catalysis and electro-magnetic separation. Herein we report a new class of stable, redox active metal organic composites for oxygen/air separation with exceptional efficiency. In particular, Ferrocene impregnated in a thermally stable hierarchical porous framework showed a saturation uptake capacity of >51 mg/g for oxygen at a very low relative saturation pressure (P/Po) of 0.06. The material shows excellent O2 selectivity from air as evident from experimental and simulated breakthrough experiments. In detail structural analysis using 57Fe-Mössbauer, X-ray photoelectron spectroscopy (XPS) and pair distribution function (PDF) analysis show that of O2 adsorption affinity and selectivity originates by the formation Fe3+-O oxide due to the highly reactive nature of the organometallics imbedded in the porous matrix.
 [1] ;  [1] ;  [2] ;  [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [2] ;  [2] ;  [4] ;  [3] ;  [5] ;  [5] ;  [6] ;  [2] ;  [2] ;  [1]
  1. Physical & Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland WA 99352 USA
  2. Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland WA 99354 USA
  3. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland WA 99354 USA
  4. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne IL 60439 USA
  5. National Security Directorate, Pacific Northwest National Laboratory, Richland WA 99352 USA
  6. Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904 1098 XH Amsterdam The Netherlands
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0935-9648; KC0203020
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Advanced Materials; Journal Volume: 28; Journal Issue: 18
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
Country of Publication:
United States
Oxygen; Composites; redox active