Accelerating lithium-mediated nitrogen reduction through an integrated palladium membrane hydrogenation reactor

Lithium-mediated N 2 reduction reaction (LiNRR) is regarded as the most robust route towards electrifying NH 3 synthesis. However, in this reaction geometry, hydrogen atoms typically supplied through electrolyte degradation, via H 2 oxidation or a combination of both, hampering the efficiency of the process. In this work we provide an alternative H-source by merging a Pd Membrane reactor (PMR) with a LiNRR reactor in a unique dual-reactor setup. Specifically, use a Pd membrane that extracts H atoms directly from H 2 O and transfers them across the membrane to an electrodeposited Li layer operating under non-aqueous LiNRR conditions. We show that these H 2 O-derived H-atoms are used directly to synthesize NH 3 in the presence of N 2 and electrodeposited Li, thereby opening orthogonal reaction pathways within the metal-mediated nitrogen reduction concept.

Abstract licence: CC BY-NC-ND

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