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Issue 36, 2014
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Electrochemical synthesis of ammonia from wet nitrogen using La0.6Sr0.4FeO3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode

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Abstract

Electrochemical synthesis of ammonia from wet nitrogen in an electrolytic cell using a La0.6Sr0.4FeO3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode and an oxide–carbonate composite electrolyte has been investigated. La0.6Sr0.4FeO3−δ was prepared via a combined EDTA–citrate complexing sol–gel process, characterised by X-ray diffraction and SEM. A tri-layer electrolytic cell was fabricated by a one-step dry-pressing and co-firing process. Ammonia was successfully synthesised from wet nitrogen under atmospheric pressure. Ammonia formation was observed at 375, 400, 425 and 450 °C and the maximum ammonia formation rate of 7 × 10−11 mol s−1 cm−2 was observed at 400 °C when a voltage of 1.4 V was applied. This ammonia formation rate corresponds to a Faradaic efficiency of ∼0.14% at a current density of 14.25 mA cm−2.

Graphical abstract: Electrochemical synthesis of ammonia from wet nitrogen using La0.6Sr0.4FeO3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode

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Article information


Submitted
10 Mar 2014
Accepted
10 Apr 2014
First published
10 Apr 2014

RSC Adv., 2014,4, 18749-18754
Article type
Paper
Author version available

Electrochemical synthesis of ammonia from wet nitrogen using La0.6Sr0.4FeO3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode

I. A. Amar, C. T. G. Petit, R. Lan, G. Mann and S. Tao, RSC Adv., 2014, 4, 18749
DOI: 10.1039/C4RA02090A

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