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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
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: |
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| 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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