Mechanochemical synthesis of Pt/TiO2 for enhanced stability in dehydrogenation of methylcyclohexane
Kuutti, Krista; Ghosalya, Manoj Kumar; Porri, Paavo; De Bellis, Jacopo; Jokimies, Päivi; Singh, Harishchandra; Wang, Shubo; King, Graham; Fernández-Catalá, Javier; Schueth, Ferdi; Ainassaari, Kaisu; Huuhtanen, Mika; Huttula, Marko; Urpelainen, Samuli; Rautiainen, Sari (2025-06-17)
Royal society of chemistry
17.06.2025
Kuutti, K., Ghosalya, M. K., Porri, P., De Bellis, J., Jokimies, P., Singh, H., Wang, S., King, G., Fernández-Catalá, J., Schüth, F., Ainassaari, K., Huuhtanen, M., Huttula, M., Urpelainen, S., & Rautiainen, S. (2025). Mechanochemical synthesis of Pt/TiO2 for enhanced stability in dehydrogenation of methylcyclohexane. Catalysis Science & Technology, 15(14), 4143–4155. https://doi.org/10.1039/D5CY00173K
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© The Author(s) 2025. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
https://creativecommons.org/licenses/by/3.0/
© The Author(s) 2025. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
https://creativecommons.org/licenses/by/3.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202506305025
https://urn.fi/URN:NBN:fi:oulu-202506305025
Tiivistelmä
Abstract
Catalytic hydrogenation/dehydrogenation of liquid organic hydrogen carriers (LOHCs), such as methylcyclohexane (MCH), enables versatile and safe transport and storage of hydrogen as a carbon neutral fuel. Supported platinum catalysts are commonly used for the dehydrogenation reaction, however, they often suffer from loss of activity due to coking. Herein, we present mechanochemically synthesised platinum on titania catalyst for the dehydrogenation of MCH, prepared starting only from metallic platinum and titania. Dry mechanochemical catalyst syntheses do not produce waste waters or toxic fumes, which are generated in the deposition of metal precursors by conventional wet synthesis methods. Detailed characterisation of the catalysts revealed that ball milling produced highly dispersed nanoparticles. Furthermore, continuous-flow MCH dehydrogenation experiments showed that the mechanochemically prepared Pt catalyst exhibited improved selectivity and stability compared to a conventional impregnated Pt/TiO2 catalyst. The hydrogen production rate of the novel ball-milled catalyst was among the highest reported for dehydrogenation of methylcyclohexane, 670 mmolH2 gPt−1 min−1.
Catalytic hydrogenation/dehydrogenation of liquid organic hydrogen carriers (LOHCs), such as methylcyclohexane (MCH), enables versatile and safe transport and storage of hydrogen as a carbon neutral fuel. Supported platinum catalysts are commonly used for the dehydrogenation reaction, however, they often suffer from loss of activity due to coking. Herein, we present mechanochemically synthesised platinum on titania catalyst for the dehydrogenation of MCH, prepared starting only from metallic platinum and titania. Dry mechanochemical catalyst syntheses do not produce waste waters or toxic fumes, which are generated in the deposition of metal precursors by conventional wet synthesis methods. Detailed characterisation of the catalysts revealed that ball milling produced highly dispersed nanoparticles. Furthermore, continuous-flow MCH dehydrogenation experiments showed that the mechanochemically prepared Pt catalyst exhibited improved selectivity and stability compared to a conventional impregnated Pt/TiO2 catalyst. The hydrogen production rate of the novel ball-milled catalyst was among the highest reported for dehydrogenation of methylcyclohexane, 670 mmolH2 gPt−1 min−1.
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