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10.3390/ma16175923
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Article

Investigation of Hydrogen and Oxygen Evolution on Cobalt-Nanoparticles-Supported Graphitic Carbon Nitride

by
Ausrine Zabielaite
*,
Aldona Balciunaite
,
Daina Upskuviene
,
Dijana Simkunaite
,
Ramunas Levinas
,
Gediminas Niaura
,
Jurate Vaiciuniene
,
Vitalija Jasulaitiene
,
Loreta Tamasauskaite-Tamasiunaite
* and
Eugenijus Norkus
Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania
*
Authors to whom correspondence should be addressed.
Materials 2023, 16(17), 5923; https://doi.org/10.3390/ma16175923
Submission received: 12 July 2023 / Revised: 14 August 2023 / Accepted: 23 August 2023 / Published: 30 August 2023
(This article belongs to the Special Issue Design and Characterization of Energy Catalytic Materials)
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Abstract

This study focuses on fabricating cobalt particles deposited on graphitic carbon nitride (Co/gCN) using annealing, microwave-assisted and hydrothermal syntheses, and their employment in hydrogen and oxygen evolution (HER and OER) reactions. Composition, surface morphology, and structure were examined using inductively coupled plasma optical emission spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The performance of Co-modified gCN composites for the HER and OER were investigated in an alkaline media (1 M KOH). Compared to the metal-free gCN, the modification of gCN with Co enhances the electrocatalytic activity towards the HER and OER. Additionally, thermal annealing of both Co(NO3)2 and melamine at 520 °C for 4 h results in the preparation of an effective bifunctional Co3O4/gCN catalyst for the HER with the lower Eonset of −0.24 V, a small overpotential of −294.1 mV at 10 mA cm−2, and a low Tafel slope of −29.6 mV dec−1 in a 1.0 M KOH solution and for the OER with the onset overpotential of 286.2 mV and overpotential of 422.3 mV to achieve a current density of 10 mA cm−2 with the Tafel slope of 72.8 mV dec−1.
Keywords: cobalt; graphitic carbon nitride; annealing; microwave-assisted synthesis; hydrothermal synthesis; hydrogen evolution; oxygen evolution cobalt; graphitic carbon nitride; annealing; microwave-assisted synthesis; hydrothermal synthesis; hydrogen evolution; oxygen evolution

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MDPI and ACS Style

Zabielaite, A.; Balciunaite, A.; Upskuviene, D.; Simkunaite, D.; Levinas, R.; Niaura, G.; Vaiciuniene, J.; Jasulaitiene, V.; Tamasauskaite-Tamasiunaite, L.; Norkus, E. Investigation of Hydrogen and Oxygen Evolution on Cobalt-Nanoparticles-Supported Graphitic Carbon Nitride. Materials 2023, 16, 5923. https://doi.org/10.3390/ma16175923

AMA Style

Zabielaite A, Balciunaite A, Upskuviene D, Simkunaite D, Levinas R, Niaura G, Vaiciuniene J, Jasulaitiene V, Tamasauskaite-Tamasiunaite L, Norkus E. Investigation of Hydrogen and Oxygen Evolution on Cobalt-Nanoparticles-Supported Graphitic Carbon Nitride. Materials. 2023; 16(17):5923. https://doi.org/10.3390/ma16175923

Chicago/Turabian Style

Zabielaite, Ausrine, Aldona Balciunaite, Daina Upskuviene, Dijana Simkunaite, Ramunas Levinas, Gediminas Niaura, Jurate Vaiciuniene, Vitalija Jasulaitiene, Loreta Tamasauskaite-Tamasiunaite, and Eugenijus Norkus. 2023. "Investigation of Hydrogen and Oxygen Evolution on Cobalt-Nanoparticles-Supported Graphitic Carbon Nitride" Materials 16, no. 17: 5923. https://doi.org/10.3390/ma16175923

APA Style

Zabielaite, A., Balciunaite, A., Upskuviene, D., Simkunaite, D., Levinas, R., Niaura, G., Vaiciuniene, J., Jasulaitiene, V., Tamasauskaite-Tamasiunaite, L., & Norkus, E. (2023). Investigation of Hydrogen and Oxygen Evolution on Cobalt-Nanoparticles-Supported Graphitic Carbon Nitride. Materials, 16(17), 5923. https://doi.org/10.3390/ma16175923

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