Co‐generation of Ammonia and H₂ from H₂O Vapor and N₂ Using a Membrane Electrode Assembly

Abstract

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. Supporting Information available onlineThe direct electrochemical synthesis of NH 3 from nitrogen and water vapor without the use of a fossil carbon source is highly desired. This synthesis is a viable option to store energy and produce fertilizer precursors. Here, a new Pt-free membrane electrode assembly is presented. An electrochemical membrane reactor demonstrates the feasibility of co-generating NH 3 and H 2 directly from nitrogen and water vapor at ambient conditions. An unprecedented high NH 3 -specific current efficiency of up to 27.5% using Ti as cathodic catalyst is reported. The co-generation can be tuned by the balance of process parameters.

Preliminary economics for green ammonia synthesis via lithium mediated pathway

“…A large and growing body of literature has investigated electrochemical methods as an alternate route to produce green ammonia from nitrogen and water at milder operating conditions. [3][4][5][6][7][8][9][10] Several studies [11][12][13] couple intermittent renewable energy sources for modular assembly capability, lower capital costs, and reduced distribution costs. 13,14 Using this approach, researchers have been able to reach a near carbon free ammonia production process.…”

Microtubular Gas Diffusion Electrode Based on Ruthenium‐Carbon Nanotubes for Ambient Electrochemical Nitrogen Reduction to Ammonia

“…The LSV curve obtained in N 2 -saturated electrolyte showed a slightly higher current density than the one in Ar-saturated electrolyte in the range from 0 to À 0.8 V vs. RHE, implying an activity of the RuÀ CNT GDE for the eNRR. [24] The RuÀ CNT GDEs were used to perform eNRR at various potentials from 0 to À 0.4 with a step of 0.1 V vs. RHE for two hours. Figure 2e presents the time-dependent current density curves at different applied potentials.…”