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Electrochemical synthesis of ammonia from wet nitrogen via a dual-chamber reactor using La0.6Sr0.4Co0.2Fe0.8O3 − δCe0.8Gd0.18Ca0.02O2 − δ composite cathode

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Amar, Ibrahim A., Lan, Rong, Humphreys, John and Tao, Shanwen (2017) Electrochemical synthesis of ammonia from wet nitrogen via a dual-chamber reactor using La0.6Sr0.4Co0.2Fe0.8O3 − δCe0.8Gd0.18Ca0.02O2 − δ composite cathode. Catalysis Today, 286 . pp. 51-56. doi:10.1016/j.cattod.2016.09.006

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Official URL: http://dx.doi.org/10.1016/j.cattod.2016.09.006

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Abstract

A La0.6Sr0.4Co0.2Fe0.8O3−δ-Ce0.8Gd0.18Ca0.02O2−δ composite cathode was used to investigate the electrochemical synthesis of ammonia from wet nitrogen. Wet nitrogen was flown through a dual chamber reactor under atmospheric pressure leading to the successful synthesis of ammonia. Ammonia was synthesised at a rate of 1.5 × 10−10 mol s−1 cm−2 at 400 °C when applying a dc voltage of 1.4 V, which is the highest reported to date. This rate is twice that of the observed ammonia formation rate (7 × 10−11 mol s−1 cm−2) when Co-free cathode, La0.6Sr0.4FeO3−δ-Ce0.8Gd0.18Ca0.02O2−δ was used as the cathode catalyst. A higher catalytic activity for ammonia synthesis may be obtained when using a catalyst with high oxygen vacancies, with the introduction of oxygen vacancies at the cathode being a good strategy to improve the catalytic activity of ammonia synthesis.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Ammonia -- Synthesis
Journal or Publication Title: Catalysis Today
Publisher: Elsevier BV
ISSN: 0920-5861
Official Date: 15 May 2017
Dates:
DateEvent
15 May 2017Published
17 September 2016Available
9 September 2016Accepted
17 May 2016Submitted
Volume: 286
Number of Pages: 6
Page Range: pp. 51-56
DOI: 10.1016/j.cattod.2016.09.006
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Grant number: EP/G01244X/1 (EPSRC)

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