• Polukeev, Alexey
• Hulteberg, Christian P.
• Wallenberg, Reine
• Wendt, Ola F.
• Uhlig, Jens

Abstract

<jats:title>Abstract</jats:title><jats:p>To enable the large‐scale use of hydrogen fuel cells for mobility applications, convenient methods for on‐board hydrogen storage and release are required. A promising approach is liquid organic hydrogen carriers (LOHCs), since these are safe, available on a large scale, and compatible with existing refueling infrastructure. Usually, LOHC dehydrogenation is carried out in batch‐type reactors by transition metals and their complexes and suffers from slow H<jats:sub>2</jats:sub> release kinetics and/or inability to reach high energy density by weight, owing to low conversion or the need to dilute the reaction mixture. In this study, a continuous flow reactor is used in combination with a heterogenized iridium pincer complex, which enables a tremendous increase in LOHC dehydrogenation rates. Thus, dehydrogenation of isopropanol is performed in a regime that, in terms of gravimetric energy density, hydrogen generation rate, and precious metal content, is potentially compatible with applications in a fuel‐cell powered car.</jats:p>

Topics

• density
• impedance spectroscopy
• energy density
• mobility
• Hydrogen
• Iridium