Impacts of Imidazolate Ligand on Performance of Zeolitic-Imidazolate Framework-Derived Oxygen Reduction Catalysts
| Autor: | Zachary B. Kaiser, Lauren R. Grabstanowicz, Hao Wang, Dan Zhao, Dominic Rebollar, Biaohua Chen, Di-Jia Liu, Heather M. Barkholtz |
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| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
Renewable Energy Sustainability and the Environment Chemistry Ligand Thermal decomposition Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Decomposition 0104 chemical sciences Catalysis chemistry.chemical_compound Fuel Technology Chemical engineering Chemistry (miscellaneous) Imidazolate Materials Chemistry 0210 nano-technology Pyrolysis |
| Zdroj: | ACS Energy Letters. 4:2500-2507 |
| ISSN: | 2380-8195 |
| DOI: | 10.1021/acsenergylett.9b01740 |
| Popis: | Carbon-hosted Fe–N-coordinated (Fe/N/C) materials, especially those derived from thermolysis of iron-added zinc-based zeolite-imidazolate frameworks (ZIFs), have emerged as the most promising platinum group metal-free (PGM-free) oxygen reduction reaction (ORR) catalysts. However, the impacts of the precursory ZIF structure and their conversion chemistry during thermal activation to the final catalytic activity remain to be further explored in the process of continuously refining the catalyst performance. Herein, we synthesized a series of Fe-doped ZIFs with different imidazolate ligands and systematically studied the correlation between the crystal structures with the final ORR catalytic activity in an alkaline electrolyte. We also investigated the ZIF decomposition chemistry during pyrolysis using a thermogravimetric mass-spectroscopic analysis. We demonstrated that imidazole side-chain substitution alters the ZIF’s decomposition during pyrolysis, influencing the elemental compositions, surface propertie... |
| Databáze: | OpenAIRE |
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