Tytuł pozycji:
Low temperature scalable synthetic approach enabling high bifunctional electrocatalytic performance of NiCo 2 S 4 and CuCo 2 S 4 thiospinels
- Tytuł:
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Low temperature scalable synthetic approach enabling high bifunctional electrocatalytic performance of NiCo 2 S 4 and CuCo 2 S 4 thiospinels
- Autorzy:
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Khan, Malik Dilshad
Mashazi, Philani
Gupta, Ram K.
Revaprasadu, Neerish
Bhoyate, Sanket
Razzaque, Shumaila
Choi, Jonghyun
Nyokong, Tebello
Shombe, Ginena Bildard
- Współwytwórcy:
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Department of Chemistry, University of Zululand, South Africa
Department of Chemistry, Rhodes University, South Africa
Department of Chemistry, Pittsburg State University, USA
Institute for Nanotechnology Innovation, Rhodes University, South Africa
Chemistry Department, University of Dar es Salaam, Tanzania
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, China
Institute of Physical Chemistry, Polish Academy of Sciences
- Słowa kluczowe:
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electrocatalysts
metal sulfides
- Data publikacji:
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2021-09-24
- Wydawca:
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Royal Society of Chemistry
- Język:
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angielski
- Linki:
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https://pubs.rsc.org/en/content/articlelanding/2021/RA/D1RA02309H  Link otwiera się w nowym oknie
https://depot.ceon.pl/handle/123456789/20819  Link otwiera się w nowym oknie
- Prawa:
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http://creativecommons.org/licenses/by/3.0/pl/
- Dostawca treści:
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Repozytorium Centrum Otwartej Nauki
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Przejdź do źródła  Link otwiera się w nowym oknie
European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 847413 for funding. Scientific work published as part of an international co-financed project founded from the programme of the Minister of Science and Higher Education entitled “PMW” in the years 2020 - 2024; agreement no. 5005/H2020-MSCA-COFUND/2019/2.
Ternary metal sulfides are currently in the spotlight as promising electroactive materials for high-performance energy storage and/or conversion technologies. Extensive research on metal sulfides has indicated that, amongst other factors, the electrochemical properties of the materials are strongly influenced by the synthetic protocol employed. Herein, we report the electrochemical performance of uncapped NiCo2S4 and CuCo2S4 ternary systems prepared via solventless thermolysis of the respective metal ethyl xanthate precursors at 200 and 300 °C. The structural, morphological and compositional properties of the synthesized nanoparticles were examined by powder X-ray diffraction (p-XRD), transmission electron microscopy (TEM), high-resolution TEM, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDX) techniques. Electrochemical studies indicate that NiCo2S4 nanoparticles synthesized at 300 °C exhibit superior energy storage characteristics with a high specific capacitance of ca. 2650 F g−1 at 1 mV s−1, as compared to CuCo2S4 nanoparticles, which showcased a specific capacitance of ca. 1700 F g−1 at the same scan rate. At a current density of 0.5 A g−1, NiCo2S4 and CuCo2S4 nanoparticles displayed specific capacitances of 1201 and 475 F g−1, respectively. In contrast, CuCo2S4 nanoparticles presented a higher electrocatalytic activity with low overpotentials of 269 mV for oxygen evolution reaction (OER), and 224 mV for the hydrogen evolution reaction (HER), at 10 mA cm−2. The stability of the catalysts was examined for 2000 cycles in which a negligible change in both OER and HER activities was observed.