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https://doi.org/10.1002/smll.201704169
Title: | Web-Like Interconnected Carbon Networks from NaCl-Assisted Pyrolysis of ZIF-8 for Highly Efficient Oxygen Reduction Catalysis | Authors: | QIAN YUHONG An, Tao BIRGERSSON,KARL ERIK Liu, Zhaolin Zhao Dan |
Keywords: | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics carbon networks interconnectivity metal-organic frameworks oxygen reduction reaction Zn-air batteries METAL-ORGANIC FRAMEWORK HIGH-SURFACE-AREA FUEL-CELL IMIDAZOLATE FRAMEWORK SYNERGISTIC CATALYST POROUS CARBONS SINGLE-ATOM GRAPHENE ELECTROCATALYSTS NANOCRYSTALS |
Issue Date: | 19-Apr-2018 | Publisher: | WILEY-V C H VERLAG GMBH | Citation: | QIAN YUHONG, An, Tao, BIRGERSSON,KARL ERIK, Liu, Zhaolin, Zhao Dan (2018-04-19). Web-Like Interconnected Carbon Networks from NaCl-Assisted Pyrolysis of ZIF-8 for Highly Efficient Oxygen Reduction Catalysis. SMALL 14 (16). ScholarBank@NUS Repository. https://doi.org/10.1002/smll.201704169 | Abstract: | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The oxygen reduction reaction (ORR) is under intense research due to its significance in energy storage and conversion processes. Recent studies show that interconnected and hierarchically porous structures can further enhance ORR kinetics as well as catalyst durability, but their preparation can be quite time and/or chemical consuming. Here, a simple approach is reported to prepare such complex structures by pyrolyzing composites containing NaCl and ZIF-8. The templating effect of molten NaCl connects ZIF-8 particles into web-like carbon networks. During ORR activity measurements, it achieves a 0.964 V onset potential and a 38 mV dec−1 Tafel slope, which are comparable to those of the benchmark Pt/C (0.979 V and 40 mV dec−1). Due to the metal-free feature, this catalyst exhibits a 16 mV shift in half-wave potential after a 10 000-cycle durability test, which is only 60% of that of Pt/C. The catalyst is also tested in Zn–air batteries and the assemblies are able to work at above 1.2 V for 140 h, which triples the life held by those with Pt/C. This study demonstrates a facile strategy to prepare metal-free ORR catalysts with interconnectivity and hierarchical porosity, and proves their great potentials in ORR catalysis and Zn–air batteries. | Source Title: | SMALL | URI: | https://scholarbank.nus.edu.sg/handle/10635/169830 | ISSN: | 1613-6810 1613-6829 |
DOI: | 10.1002/smll.201704169 |
Appears in Collections: | Elements Staff Publications |
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Zhao_2017_Small_salt-assisted pyrolysis of ZIF-8_manuscript_2.doc | Accepted version | 8.1 MB | Microsoft Word | OPEN | Post-print | View/Download |
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