期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 840, 期 -, 页码 27-34出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.03.056
关键词
Metal-organic framework; Cobalt disulfide; Oxygen reduction reaction; Electrocatalyst
资金
- National Natural Science Foundation of China [51472174, 61604086, 21776147]
- International Science and Technology Cooperation Programme of China [2014DFA60150]
- Department of Science and Technology of Shandong Province [ZR2018BB066, 2016GGX104010]
- Department of Education of Shandong Province [J16LA14]
- Malmstrom Endowment Fund at Hamline University
In this study, metal-organic framework (MOF) of ZIF-67 is utilized as a precursor to synthesize nitrogen-doped porous graphitized carbon-supported cobalt disulfide (CoS2@NC) catalyst. The CoS2@NC composite combines the advantages of CoS2 and N-doped carbon with excellent oxygen reduction reaction (ORR) catalytic characteristics. For instance, the CoS2@NC catalyst exhibits an onset potential of -0.105 V vs. Ag/AgCl, a half-wave potential of -0.172 V and a diffusion-limited current density of 5.49 mA cm(-2), which are similar to commercial PVC with slight inferior difference of 24 my, 10 mV and 0.38 mA cm(-2), respectively. However, the CoS2@NC shows better methanol tolerance and long-term durability than the Pt/C catalyst. The findings above demonstrate that a simple and efficient method is developed for the synthesis of MOF-derived carbon-supported metal sulfides for ORR electrocatalysts.
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