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Efficient synthesis for large-scale production and characterization for hydrogen storage of ligand exchanged MOF-74/174/184-M (M=Mg2+, Ni2+)

DOI: 10.1016/j.ijhydene.2016.08.153 DOI Help

Authors: Hyunchul Oh (Max Planck Institute for Intelligent Systems; Gyeongnam National University of Science and Technology) , Stefan Maurer (BASF SE) , Rafael Balderas-xicohtencatl (Max Planck Institute for Intelligent Systems) , Lena Arnold (BASF SE) , Oxana Magdysyuk (Diamond Light Source ; Max Planck Institute for Solid State Research) , Gisela Schütz (Max Planck Institute for Intelligent Systems) , Ulrich Müller (BASF SE) , Michael Hirscher (Max Planck Institute for Intelligent Systems)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: International Journal Of Hydrogen Energy

State: Published (Approved)
Published: September 2016

Abstract: A semitechnical route (optimized by BASF SE) to synthesize MOF-74/174-M (M = Mg2+, Ni2+) efficiently in ton-scale production is presented with the goal of mobile and stationary gas storage applications especially for hydrogen as future energy carrier. In addition, a new member of these series of materials, MOF-184-M (M = Mg2+, Ni2+) is introduced using ligand exchange strategy in order to produce a more porous analogue (possessing large aperture) without loss of crystallinity. This family comprising MOF-74/174/184 are characterized systematically for hydrogen adsorption properties by volumetric measurements with a Sieverts’ apparatus. Replacing the linker by a longer one results in an increase of the BET area from 984 to 3154 m2/g and an enhancement of the excess cryogenic (77 K) hydrogen storage capacity from 1.8 to 4.7 wt%. The heat of adsorption of linker exchanged MOF-174/184 (as a function of uptake) shows similar values to the parent MOF-74, indicating successful construction of expanded MOFs in large scale production. Finally, a usable capacity of these MOFs is investigated for mobile application, revealing that the increasing surface area without strong binding metal sites through longer linker exchange is one of important parameters for improving usable capacity.

Journal Keywords: Hydrogen storage; Hydrogen adsorption; Metal-organic frameworks; Physisorption

Subject Areas: Chemistry

Facility: ESRF