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Issue 46, 2019
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Supported palladium membrane reactor architecture for electrocatalytic hydrogenation

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Abstract

Electrolytic palladium membrane reactors offer a means to perform hydrogenation chemistry utilizing electrolytically produced hydrogen derived from water instead of hydrogen gas. While previous embodiments of these reactors employed thick (≥25 μm) palladium foil membranes, we report here that the amount of palladium can be reduced by depositing a thin (1–2 μm) layer of palladium onto a porous polytetrafluoroethylene (PTFE) support. The supported palladium membrane can be designed to ensure the fast diffusion of reagent and hydrogen to the palladium layer. The hydrogenation of 1-hexyne, for example, shows that the supported Pd/PTFE membrane can achieve reaction rates (e.g., 0.71 mmol h−1) which are comparable to 0.92 mmol h−1 measured for palladium membranes with a high-surface area palladium electrocatalyst layer. The root cause of these comparable rates is that the high porosity of PTFE enables a 12-fold increase in electrocatalytic surface area compared to planar palladium foil membranes. These results provide a pathway for designing a cost-effective and potentially scalable electrolytic palladium membrane reactor.

Graphical abstract: Supported palladium membrane reactor architecture for electrocatalytic hydrogenation

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Supplementary files

Article information


Submitted
22 Jul 2019
Accepted
29 Oct 2019
First published
29 Oct 2019

J. Mater. Chem. A, 2019,7, 26586-26595
Article type
Paper

Supported palladium membrane reactor architecture for electrocatalytic hydrogenation

R. S. Delima, R. S. Sherbo, D. J. Dvorak, A. Kurimoto and C. P. Berlinguette, J. Mater. Chem. A, 2019, 7, 26586
DOI: 10.1039/C9TA07957B

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