Modulated synthesis of chromium-based metal-organic framework (MIL-101) with enhanced hydrogen uptake |
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| Authors: | Jianwei Ren Nicholas M Musyoka Henrietta W Langmi Tshiamo Segakweng Brian C North Mkhulu Mathe Xiangdong Kang |
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| Affiliation: | 1. HySA Infrastructure Centre of Competence, Materials Science and Manufacturing, Council for Scientific and Industrial Research (CSIR), PO Box 395, Pretoria 0001, South Africa;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China |
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| Abstract: | Modulated synthesis of MIL-101(Cr) in high yield and with good reproducibility using formic acid as a modulator is reported. Higher molar ratio of formic acid/CrCl3 was found to form better shape-defined MIL-101(Cr) crystals with higher surface area, larger pore volume and better hydrogen uptake performance. The highly crystalline MIL-101(Cr), composed of crystals in the size range of 100–150 nm with multifaceted surface, could be obtained in an optimized molar regime of CrCl3·6H2O/H2BDC/100HCOOH/550H2O at 210 °C for 8 h. The MIL-101(Cr) obtained from the modulated synthesis also showed high thermal and moisture stabilities as well as enhanced hydrogen storage capacity, making this material particularly promising for practical hydrogen storage applications. |
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| Keywords: | MIL-101(Cr) Modulated synthesis Hydrogen storage Nucleation rate |
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