Enhanced Sorption Performance of MgH2 Doped with Reduced Metal-Organic Framework of Ni-Co-MOF-74
Atikah Kadri1, Xiangdong Yao2
1Atikah Kadri, Faculty of Chemical Engineering, Universiti Teknologi Mara (UiTM) 40000 Shah Alam Selangor, Malaysia.
2Xiangdong Yao, Queensland Micro- and Nanotechnology Centre (QMNC), Griffith University, Nathan, Brisbane, QLD 4111, Australia.
Manuscript received on 13 April 2019 | Revised Manuscript received on 17 May 2019 | Manuscript published on 30 May 2019 | PP: 3149-3155 | Volume-8 Issue-1, May 2019 | Retrieval Number: A1471058119/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Improvement has been made in hydrogen storage performance particularly in MgH2 system prepared via high energy ball milling technique where bi-metal in the metal organic framework of Ni-Co-MOF-74 was introduced as catalyst. Better catalytic effect was recorded when pre-reduced Ni-Co-MOF-74 is used as catalyst for both hydrogen absorption and desorption. An apparent amount of reduced metal species in the MgH2 system containing bi-metal in metal organic framework promotes more active sites which eventually improved the sorption properties and shifted the thermodynamic stability of the composite. At 280°C, hydrogen desorption was 4.7 wt% in a period of 30 minutes whereas at 200°C a remarkable hydrogen amount of 6.3 wt% was stored in 2 minutes. It is believed that the distinctive coordinate of the metal in the pre-reduced metal organic framework improved the dispersion of the catalyst thus enriched the sorption properties.
Index Terms: Catalysts, Hydrogen Storage, Magnesium Hydride, Mechanical Milling, Metal Organic Framework.
Scope of the Article: Mechanical Design