عنوان المقالة:Electrochemical synthesis of ammonia from wet nitrogen using La0.6Sr0.4FeO3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode Electrochemical synthesis of ammonia from wet nitrogen using La0.6Sr0.4FeO3−δ–Ce0.8Gd0.18Ca0.02O2−δ composite cathode
Ibrahim A. Amar, Christophe T. G. Petit, Rong Lan, Gregory Mann, Shanwen Tao
English Authors
Ibrahim A. Amar, Christophe T. G. Petit, Rong Lan, Gregory Mann, Shanwen Tao
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.
إبراهيم علي أحمد عمار | Ibrahim Ali Ahmed Amar | 15353