Hydrogen Adsorption in Metal–Organic Frameworks: Cu‐MOFs and Zn‐MOFs Compared

Advanced Functional Materials - Tập 16 Số 4 - Trang 520-524 - 2006
Barbara Panella1, Michael Hirscher1, Hein Putter2, Ulrich Müller2
1Dept. Modern Magnetic Systems, Max Planck Institute for Intelligent Systems, Max Planck Society
2Chemicals Research and Engineering, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany

Tóm tắt

AbstractHydrogen adsorption in two different metal–organic frameworks (MOFs), MOF‐5 and Cu‐BTC (BTC: benzene‐1,3,5‐tricarboxylate), with Zn2+ and Cu2+ as central metal ions, respectively, is investigated at temperatures ranging from 77 K to room temperature. The process responsible for hydrogen storage in these MOFs is pure physical adsorption with a heat of adsorption of approximately –4 kJ mol–1. With a saturation value of 5.1 wt.‐% for the hydrogen uptake at high pressures and 77 K, MOF‐5 shows the highest storage capacity ever reported for crystalline microporous materials. However, at low pressures Cu‐BTC shows a higher hydrogen uptake than MOF‐5, making Cu‐based MOFs more promising candidates for potential storage materials. Furthermore, the hydrogen uptake is correlated with the specific surface area for crystalline microporous materials, as shown for MOFs and zeolites.

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Thông tin
Thông tin xuất bản

Advanced Functional Materials

Tập 16 Số 4

520-524

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