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Supported palladium membrane reactor architecture for electrocatalytic hydrogenation

Abstract

Electrolytic palladium membrane reactors offer a means of hydrogenation that utilizes hydrogen derived from water electrolysis instead of hydrogen gas. Previous embodiments of these reactors employ expensive palladium foil membranes (≥25 µm thickness). We report here that the amount of palladium used in these membrane reactors can be reduced by depositing a thin (1–2 µm) layer of palladium onto a porous polytetrafluoroethylene (PTFE) support. This supported palladium membrane was designed to ensure fast solvent and/or electrolyte diffusion to the palladium layer. The hydrogenation of 1-hexyne, for example, shows that the Pd/PTFE membrane demonstrates consumption rates of 0.71 mmol h-1, which is comparable to 0.92 mmol h-1 measured for high-surface area palladium (with Pd catalyst). The high porosity of the PTFE enables a 12-fold increase in electrocatalytic surface area at the Pd–PTFE interface compared to planar palladium foil membranes. We show here a pathway for creating supported membranes that can lead to a cost-effective and potentially scalable electrolytic palladium membrane reactor.

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Publication details

The article was received on 22 Jul 2019, accepted on 29 Oct 2019 and first published on 29 Oct 2019


Article type: Paper
DOI: 10.1039/C9TA07957B
J. Mater. Chem. A, 2019, Accepted Manuscript

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    Supported palladium membrane reactor architecture for electrocatalytic hydrogenation

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

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