Gas-phase approach to the modification of carbon surfaces by F-, Cl- and Br-containing groups and their selective substitution for catalytic sulfo groups
Mussabek G. Baktygerey S. Taurbayev Y. Yermukhamed D. Zhylkybayeva N. Zaderko A.N. Diyuk V.E. Afonin S. Grishchenko L.M. Lisnyak V.V.
1 May 2025Elsevier B.V.
Applied Surface Science
2025#690
Petrodarco® 4X10 nanoporous activated carbon was halogenated in the gas phase using 1,1,1,2-tetrafluoroethane, dichlorodifluoromethane and 1,2-dibromotetrafluoroethane, followed by sulfonation of the carbon surface to create specific active sites. The concentration of halogen groups introduced into the activated carbon at high temperatures was measured, and these groups were transformed into functional groups favorable for substitution or catalytic applications. Catalytic studies confirmed that selected halogen groups could be efficiently substituted with highly catalytic active SO3H groups, making the material particularly effective for the catalytic dehydration of 2-propanol in the gas–solid phase, with excellent efficiency and stability at temperatures below 200 °C. Based on these findings, we have developed a promising process for converting highly halogenated freons into effective carbon-based catalysts for dehydration reactions or, potentially, as acidic electrodes in fuel cells.
Freons , Gas phase , High temperature , Solid acid catalysts , Surface modification
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Nanotechnological Laboratory of Open Type, Al-Farabi Kazakh National University, 71, Al-Farabi Ave., Almaty, 050040, Kazakhstan
Institute of Information and Computational Technologies, 125, Pushkin Str., Almaty, 050012, Kazakhstan
Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71, Al-Farabi Ave., Almaty, 050040, Kazakhstan
Light Matter Institute, UMR-5306, Claude Bernard University of Lyon/CNRS, Université de Lyon, Villeurbanne Cedex, 69622, France
Chemical Faculty, Taras Shevchenko National University of Kyiv, 62a, Volodymyrska Str., Kyiv, 01033, Ukraine
Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology, POB 3640, Karlsruhe, 76021, Germany
Chuiko Institute of Surface Chemistry, the National Academy of Sciences of Ukraine, General Naumov Str. 17, Kyiv, 03164, Ukraine
Institute of Macromolecular Chemistry, the National Academy of Sciences of Ukraine, 48 Kharkivske Shose, Kyiv, 02160, Ukraine
Western Caspian University, 31, Istiglaliyyat Str., Baku, AZ1001, Azerbaijan
Nanotechnological Laboratory of Open Type
Institute of Information and Computational Technologies
Institute of Experimental and Theoretical Physics
Light Matter Institute
Chemical Faculty
Institute of Biological Interfaces (IBG-2)
Chuiko Institute of Surface Chemistry
Institute of Macromolecular Chemistry
Western Caspian University
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