期刊
APPLIED SURFACE SCIENCE
卷 605, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.154691
关键词
Catalyst; Energy storage; Fuel cell; Solvent; Framework
类别
资金
- Technology Innovation Program - Ministry of Trade, Industry and Energy (MOTIE, Korea) [20016795]
- (Development of manufacturing technology independence of advanced activated carbons and application for high performance supercapacitors) - Ministry of Trade, Industry and Energy (MOTIE, Korea)
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1A2C2012356]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20016795] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, shape-controlled cobalt phenylphosphonate organic framework nanostructures were prepared by changing the solvent polarity. The prepared materials exhibited excellent performance in methanol oxidation and supercapacitor applications.
Cobalt (Co) based materials are promising candidates for energy-related applications because of its inexpensiveness, and promising activities, such as redox properties, electrocatalytic, energy storage and so on. The simple approach with enhanced performance of Co-based materials is highly desirable for real-world energy -related applications. In this work, we have prepared the shape-controlled cobalt phenylphosphonate (CP) organic framework nanostructures (CP-nanosheets in H2O, CP-nanoflakes in C2H5OH, CP-nanorods in H2O/C2H5OH and CP-triangular nanosheets in CH3OH) by changing the solvent polarity in a simple hydrothermal/solvothermal (HS) method. The prepared CP nanostructure materials were utilized for the methanol oxidation and super-capacitor applications. It was observed that CP-nanorods exhibited excellent catalytic performance towards methanol electro-oxidation and energy storage performance when compared to other CP nanostructures due to the availability of large electroactive sites, which was also supported by density functional theory (DFT) studies. The fabricated CP-nanorods based electrode exhibited a good catalytic constant (7.79 x 105cm3.mol(-1).s(-1)), higher oxidation peak current (2.97 +/- 0.11 mA cm(-2)) for methanol oxidation and also delivered high specific capacity of 218 C g(-1 )at 0.25 A/g, good long-term stability (82 %) up to 8000 cycles when used as electrode materials for supercapacitor application.
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