Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction
The hexagonal NiCo2S4 hierarchical nanostructure was nucleated on the reduced graphene oxide (rGO) sheets using a simple hydrothermal method for use it as an electrode material for supercapacitor applications. Benefiting the synergistic effects from the hierarchical architecture of NiCo2S4 and outst...
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doaj-ce96fb28652e4a918340f6203e8460572021-05-24T04:31:04ZengElsevierJournal of Materials Research and Technology2238-78542021-05-011224892501Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reductionSubalakshmi Kumar0Sankar Sekar1Ashok Kumar Kaliamurthy2Sejoon Lee3Division of Physics & Semiconductor Science, Dongguk University-Seoul, Seoul, 04620, Republic of Korea; Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, 04620, Republic of KoreaDivision of Physics & Semiconductor Science, Dongguk University-Seoul, Seoul, 04620, Republic of Korea; Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, 04620, Republic of KoreaDepartment of Nuclear Physics, University of Madras, Guindy Campus, Chennai, 600025, Tamil Nadu, India; Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of KoreaDivision of Physics & Semiconductor Science, Dongguk University-Seoul, Seoul, 04620, Republic of Korea; Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, 04620, Republic of Korea; Corresponding author.The hexagonal NiCo2S4 hierarchical nanostructure was nucleated on the reduced graphene oxide (rGO) sheets using a simple hydrothermal method for use it as an electrode material for supercapacitor applications. Benefiting the synergistic effects from the hierarchical architecture of NiCo2S4 and outstanding conductivity of rGO, the hybrid rGO-NiCo2S4 composites provided many advantages such as increased electrolyte diffusion pathways, fast electron transport, and ample active sites. Thus, the hybrid rGO-NiCo2S4 composites presented a higher specific capacitance (972 F/g), compared with bare NiCo2S4 (716 F/g), at the current density of 1 A/g. Using the prepared nanomaterials, the asymmetric supercapacitor devices were constructed in the form of the 2-electrodes scheme. Remarkably, the rGO-NiCo2S4 based device demonstrated the excellent energy-storage characteristics with a higher specific capacitance (208 F/g) than that of the bare NiCo2S4 based device (86 F/g). After 2000 cycles, the rGO-NiCo2S4 supercapacitor device revealed an excellent cyclic stability with 94.1% of the capacitance retention at the current density of 3 A/g. Moreover, hybrid rGO-NiCo2S4 showed an admirable catalytic activity for nitroarene reduction. These findings suggest that the prepared rGO-NiCo2S4 MOF can be served as an excellent bifunctional electrocatalyst for the high-performance supercapacitor and the nitroarene reduction applications.http://www.sciencedirect.com/science/article/pii/S2238785421003434Ternary metal chalcogenideMetal organic frameworksAsymmetric supercapacitors4-Nitrophenol reduction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Subalakshmi Kumar Sankar Sekar Ashok Kumar Kaliamurthy Sejoon Lee |
spellingShingle |
Subalakshmi Kumar Sankar Sekar Ashok Kumar Kaliamurthy Sejoon Lee Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction Journal of Materials Research and Technology Ternary metal chalcogenide Metal organic frameworks Asymmetric supercapacitors 4-Nitrophenol reduction |
author_facet |
Subalakshmi Kumar Sankar Sekar Ashok Kumar Kaliamurthy Sejoon Lee |
author_sort |
Subalakshmi Kumar |
title |
Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction |
title_short |
Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction |
title_full |
Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction |
title_fullStr |
Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction |
title_full_unstemmed |
Bifunctional rGO-NiCo2S4 MOF hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction |
title_sort |
bifunctional rgo-nico2s4 mof hybrid with high electrochemical and catalytic activity for supercapacitor and nitroarene reduction |
publisher |
Elsevier |
series |
Journal of Materials Research and Technology |
issn |
2238-7854 |
publishDate |
2021-05-01 |
description |
The hexagonal NiCo2S4 hierarchical nanostructure was nucleated on the reduced graphene oxide (rGO) sheets using a simple hydrothermal method for use it as an electrode material for supercapacitor applications. Benefiting the synergistic effects from the hierarchical architecture of NiCo2S4 and outstanding conductivity of rGO, the hybrid rGO-NiCo2S4 composites provided many advantages such as increased electrolyte diffusion pathways, fast electron transport, and ample active sites. Thus, the hybrid rGO-NiCo2S4 composites presented a higher specific capacitance (972 F/g), compared with bare NiCo2S4 (716 F/g), at the current density of 1 A/g. Using the prepared nanomaterials, the asymmetric supercapacitor devices were constructed in the form of the 2-electrodes scheme. Remarkably, the rGO-NiCo2S4 based device demonstrated the excellent energy-storage characteristics with a higher specific capacitance (208 F/g) than that of the bare NiCo2S4 based device (86 F/g). After 2000 cycles, the rGO-NiCo2S4 supercapacitor device revealed an excellent cyclic stability with 94.1% of the capacitance retention at the current density of 3 A/g. Moreover, hybrid rGO-NiCo2S4 showed an admirable catalytic activity for nitroarene reduction. These findings suggest that the prepared rGO-NiCo2S4 MOF can be served as an excellent bifunctional electrocatalyst for the high-performance supercapacitor and the nitroarene reduction applications. |
topic |
Ternary metal chalcogenide Metal organic frameworks Asymmetric supercapacitors 4-Nitrophenol reduction |
url |
http://www.sciencedirect.com/science/article/pii/S2238785421003434 |
work_keys_str_mv |
AT subalakshmikumar bifunctionalrgonico2s4mofhybridwithhighelectrochemicalandcatalyticactivityforsupercapacitorandnitroarenereduction AT sankarsekar bifunctionalrgonico2s4mofhybridwithhighelectrochemicalandcatalyticactivityforsupercapacitorandnitroarenereduction AT ashokkumarkaliamurthy bifunctionalrgonico2s4mofhybridwithhighelectrochemicalandcatalyticactivityforsupercapacitorandnitroarenereduction AT sejoonlee bifunctionalrgonico2s4mofhybridwithhighelectrochemicalandcatalyticactivityforsupercapacitorandnitroarenereduction |
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1721428927591743488 |