Toward High-Energy-Density Fuels for Direct Liquid Organic Hydrogen Carrier Fuel Cells: Electrooxidation of 1-Cyclohexylethanol

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

Journal

Journal of Physical Chemistry Letters American Chemical Society

Book Volume: 15

Pages Range: 2529-2536

Journal Issue: 9

DOI: 10.1021/acs.jpclett.3c03331

Abstract

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.

Authors with CRIS profile

Lukáš Fusek Lehrstuhl für Katalytische Grenzflächenforschung Lukas Fromm Lehrstuhl für Theoretische Chemie Evanie Franz Lehrstuhl für Katalytische Grenzflächenforschung Juntao Yang Lehrstuhl für Katalytische Grenzflächenforschung Andreas Görling Lehrstuhl für Theoretische Chemie Olaf Brummel Lehrstuhl für Katalytische Grenzflächenforschung Jörg Libuda Lehrstuhl für Katalytische Grenzflächenforschung

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

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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