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Efficient Electrocatalytic Synthesis of Ammonia from Water and Air in a Membrane‐Free Cell: Confining the Iron Oxide Catalyst to the Cathode.

Authors :
Liu, Xinye
Li, Fang‐Fang
Peng, Ping
Licht, Gad
Licht, Stuart
Source :
European Journal of Inorganic Chemistry. 4/30/2020, Vol. 2020 Issue 15/16, p1428-1436. 9p.
Publication Year :
2020

Abstract

Ammonia is critical for food and chemical production; however, NH3 synthesis is one of the largest industrial greenhouse gas producers. We report a path to an exceptionally high rate (2.3 × 10–9 mol of NH3 s–1 cm–2), CO2 free NH3 electrosynthesis from H2O and air under ambient electrolysis conditions (60 °C, 1 atm). Iron oxide (dispersed in hydroxide electrolyte) catalyzed NH3 synthesis is probed at intermediate temperature (20–200 °C) and pressure (1–10 atm) with Monel mesh electrodes. Iron calcination preparation of the iron oxide catalyst is optimized by size, and then physically constrained to the reactive domain of the electrolysis cell cathode through use of mesh electrodes at even lower temperatures, allowing for an ambient, preferred electrosynthesis. These novel constraints enhance NH3 catalyst utilization at low temperature and open future pathways to the addition of ion‐specific membranes to the high rate NH3 synthesis cell. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14341948
Volume :
2020
Issue :
15/16
Database :
Academic Search Index
Journal :
European Journal of Inorganic Chemistry
Publication Type :
Academic Journal
Accession number :
142867759
Full Text :
https://doi.org/10.1002/ejic.201900667