Enhanced hydrogen sorption properties over Mg2+ modified solvothermal synthesized HKUST-1 (Mg2+/HKUST-1)
Abstract
The development of high capacity materials for hydrogen storage such as MOFs to support the utilization of hydrogen as a renewable energy source is an attractive area for further investigation. In this research, a well-known type of MOF, specifically HKUST-1, was synthesized using the solvothermal method and ex-situ modified with magnesium(II) ions at 3, 5, and 10 wt% to serve as additional binding sites to form Mg2+/HKUST-1. The resulting materials were analysed via XRD, FTIR, SEM-EDX, and a nitrogen sorption isotherm. Hydrogen sorption measurements were conducted using a Sievert system. The structure and morphology of HKUST-1 remained stable after it was embedded with Mg2+ according to X-ray diffraction, FTIR, and SEM analysis. Nitrogen sorption isotherm revealed that before and after modification with Mg2+, the materials could be classified as microporous and the surface area increased significantly from 713.283 to 1200.211 m2/g. The presence of Mg2+ in the HKUST-1 enhanced its hydrogen sorption capacity up to 0.292 wt% at 1.2 bar under an operational temperature of 30°C and 0.48 wt% at 80°C (1.4 bar).
- Publication:
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Materials Science and Engineering Conference Series
- Pub Date:
- April 2019
- DOI:
- 10.1088/1757-899X/509/1/012152
- Bibcode:
- 2019MS&E..509a2152W