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Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium
Abstract
Herein, we demonstrate that modification of TiO2 nanotubes with graphene–strontium and cobalt molybdate perovskite can turn them into active electrocatalysts for hydrogen evolution reaction (HER). For this purpose, a simple method of hydrothermal synthesis of perovskites was developed directly on the TiO2 nanotubes substrate. Moreover, the obtained hybrids were also decorated with graphene oxide (GO) during one-step hydrothermal synthesis. The obtained materials were characterized by scanning electron microscopy with energy dispersive X-ray analysis, Raman spectroscopy, and X-ray diffraction analysis. Catalytic properties were verified by electrochemical methods (linear voltammetry, chronopotentiometry). The obtained hybrids were characterized by much better catalytic properties towards hydrogen evolution reaction compared to TiO2 and slightly worse than platinum. The optimized hybrid catalyst (decorated by GO) can drive a cathodic current density of 10 mA cm−2 at an overpotential of 121 mV for HER with a small Tafel slope of 90 mV dec−1 in 0.2 M H2SO4.
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Authors (5)
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Anna Ilnicka
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Malgorzata Skorupska
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Marcin Wysokowski
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Jerzy P. Lukaszewicz
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1038/s41598-022-27143-5
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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Scientific Reports
no. 12,
ISSN: 2045-2322 - Language:
- Polish
- Publication year:
- 2022
- Bibliographic description:
- Szkoda M., Ilnicka A., Skorupska M., Wysokowski M., Lukaszewicz J. P.: Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium// Scientific Reports -Vol. 12,iss. 1 (2022),
- DOI:
- Digital Object Identifier (open in new tab) 10.1038/s41598-022-27143-5
- Sources of funding:
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- Free publication
- Verified by:
- Gdańsk University of Technology
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