Solvent-Free Synthesis of Zeolitic Imidazolate Frameworks and the Catalytic Properties of Their Carbon Materials |
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Authors: | Yuchen Xiao Anh N Hong Dandan Hu Yanxiang Wang Prof Xianhui Bu Prof Pingyun Feng |
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Institution: | 1. Department of Chemistry, University of California, Riverside, 900 University Ave, Riverside, CA, 92521 USA;2. Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Boulevard, Long Beach, CA, 90840 USA |
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Abstract: | Zeolitic imidazolate frameworks (ZIFs) are traditionally synthesized solvothermally by using cost- and waste-incurring organic solvents. Here, a direct synthesis method is reported for ZIF-8, ZIF-67, and their heterometallic versions from solid precursors only. This solvent-free crystallization method not only completely avoids organic solvents, but also provides an effective path for the synthesis of homogeneous mixed-metal ZIFs. Furthermore, under templating by NaCl/ZnCl2 eutectic salt, carbonization of the ZIF materials gives rise to a series of N-containing high-surface-area carbon materials with impressive catalytic properties for the oxygen reduction reaction. |
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Keywords: | electrocatalysis oxygen reduction reaction (ORR) solvent-free synthesis zeolitic imidazolate frameworks ZIF-67 ZIF-8 ZIF-Zn/Co |
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