Fusek L, Briega-Martos V, Minichová M, Fromm L, Franz E, Yang J, Görling A, Mayrhofer KJ, Wasserscheid P, Cherevko S, Brummel O, Libuda J (2024)
Publication Type: Journal article
Publication year: 2024
Book Volume: 15
Pages Range: 2529-2536
Journal Issue: 9
DOI: 10.1021/acs.jpclett.3c03331
Electrochemically active liquid organic hydrogen carriers (EC-LOHCs) can be used directly in fuel cells; so far, however, they have rather low hydrogen storage capacities. In this work, we study the electrooxidation of a potential EC-LOHC with increased energy density, 1-cyclohexylethanol, which consists of two storage functionalities (a secondary alcohol and a cyclohexyl group). We investigated the product spectrum on low-index Pt single-crystal surfaces in an acidic environment by combining cyclic voltammetry, chronoamperometry, and in situ infrared spectroscopy, supported by density functional theory. We show that the electrooxidation of 1-cyclohexylethanol is a highly structure-sensitive reaction with activities Pt(111) ≫ Pt(100) > Pt(110). Most importantly, we demonstrate that 1-cyclohexylethanol can be directly converted to acetophenone, which desorbs from the electrode surface. However, decomposition products are formed, which lead to poisoning. If the latter side reactions could be suppressed, the electrooxidation of 1-cyclohexylethanol would enable the development of EC-LOHCs with greatly increased hydrogen storage capacities.
APA:
Fusek, L., Briega-Martos, V., Minichová, M., Fromm, L., Franz, E., Yang, J.,... Libuda, J. (2024). Toward High-Energy-Density Fuels for Direct Liquid Organic Hydrogen Carrier Fuel Cells: Electrooxidation of 1-Cyclohexylethanol. Journal of Physical Chemistry Letters, 15(9), 2529-2536. https://doi.org/10.1021/acs.jpclett.3c03331
MLA:
Fusek, Lukáš, et al. "Toward High-Energy-Density Fuels for Direct Liquid Organic Hydrogen Carrier Fuel Cells: Electrooxidation of 1-Cyclohexylethanol." Journal of Physical Chemistry Letters 15.9 (2024): 2529-2536.
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