Amar, I. A., Petit, C. T.G., Zhang, L., Lan, R., Skabara, P. J. and Tao, S. (2011) Electrochemical synthesis of ammonia based on doped-ceria-carbonate composite electrolyte and perovskite cathode. Solid State Ionics, 201(1), pp. 94-100. (doi: 10.1016/j.ssi.2011.08.003)
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Abstract
Electrochemical synthesis of ammonia was investigated using a cobalt-free La0.6Sr0.4Fe0.8Cu0.2O3-δ-Ce0.8Sm0.2O2-δ (LSFCu-SDC) composite cathode and SDC-ternary carbonate composite electrolyte. La0.6Sr0.4Fe0.8Cu0.2O3-δ and Ce0.8Sm0.2O2-δ were prepared via combined EDTA-citrate complexing sol–gel and glycine nitrate processes, respectively, and characterised by X-ray diffraction (XRD). Ammonia was successfully synthesised from wet hydrogen and dry nitrogen under atmospheric pressure using Ni-SDC, SDC-carbonate and LSFCu-SDC composites as anode, electrolyte and cathode respectively. Ammonia formation was observed at 400, 425, 450 and 475 °C and the maximum rate of ammonia production was found to be 5.39 × 10−9 mol s−1 cm−2 at 450 °C and 0.8 V. The AC impedance measurements were recorded before and after the ammonia synthesis in the range of temperature 400–475 °C. The formation of ammonia at the N2 side together with stable current at 450 °C under constant voltage demonstrates that SDC-(Li/Na/K)2CO3 composite electrolyte exhibits significant proton conduction at a temperature around 450 °C.
Item Type: | Articles |
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Additional Information: | The authors gratefully thank EPSRC for funding. One of the authors (Ibrahim A. Amar) thanks The Libyan Cultural Affairs, London for the financial support of his study in the UK. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Skabara, Professor Peter |
Authors: | Amar, I. A., Petit, C. T.G., Zhang, L., Lan, R., Skabara, P. J., and Tao, S. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | Solid State Ionics |
Publisher: | Elsevier |
ISSN: | 0167-2738 |
ISSN (Online): | 1872-7689 |
Published Online: | 09 September 2011 |
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