Please use this identifier to cite or link to this item: 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
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