Abstract
Electrochemical synthesis of ammonia was investigated using a cobalt-free La0.6Sr0.4Fe0.8Cu0.2O3-delta-Ce-0.8-sm(0.2)O(2-delta) (LSFCu-SDC) composite cathode and SDC-ternary carbonate composite electrolyte. La0.6Sr0.4Fe0.8-Cu0.2O3-delta and Ce0.8Sm0.2O2-delta 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 degrees C and the maximum rate of ammonia production was found to be 5.39 x 10(-9) mol s(-1) cm(-2) at 450 degrees C and 0.8 V. The AC impedance measurements were recorded before and after the ammonia synthesis in the range of temperature 400-475 degrees C. The formation of ammonia at the N-2 side together with stable current at 450 degrees C under constant voltage demonstrates that SDC-(Li/Na/K)(2)CO3 composite electrolyte exhibits significant proton conduction at a temperature around 450 degrees C. (C) 2011 Elsevier BM. All rights reserved.
| Language | English |
|---|---|
| Pages | 94-100 |
| Number of pages | 7 |
| Journal | Solid State Ionics |
| Volume | 201 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 19 Oct 2011 |
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Keywords
- solid state ionics
- ammonia
- doped-ceria-carbonate
- electrolyte
- perovskite cathode
- TIC - Bionanotechnology
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Electrochemical synthesis of ammonia based on doped-ceria-carbonate composite electrolyte and perovskite cathode. / Amar, Ibrahim A.; Petit, Christophe T. G.; Zhang, Lei; Lan, Rong; Tao, Shanwen; Skabara, Peter.
In: Solid State Ionics , Vol. 201, No. 1, 19.10.2011, p. 94-100.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electrochemical synthesis of ammonia based on doped-ceria-carbonate composite electrolyte and perovskite cathode
AU - Amar, Ibrahim A.
AU - Petit, Christophe T. G.
AU - Zhang, Lei
AU - Lan, Rong
AU - Tao, Shanwen
AU - Skabara, Peter
PY - 2011/10/19
Y1 - 2011/10/19
N2 - Electrochemical synthesis of ammonia was investigated using a cobalt-free La0.6Sr0.4Fe0.8Cu0.2O3-delta-Ce-0.8-sm(0.2)O(2-delta) (LSFCu-SDC) composite cathode and SDC-ternary carbonate composite electrolyte. La0.6Sr0.4Fe0.8-Cu0.2O3-delta and Ce0.8Sm0.2O2-delta 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 degrees C and the maximum rate of ammonia production was found to be 5.39 x 10(-9) mol s(-1) cm(-2) at 450 degrees C and 0.8 V. The AC impedance measurements were recorded before and after the ammonia synthesis in the range of temperature 400-475 degrees C. The formation of ammonia at the N-2 side together with stable current at 450 degrees C under constant voltage demonstrates that SDC-(Li/Na/K)(2)CO3 composite electrolyte exhibits significant proton conduction at a temperature around 450 degrees C. (C) 2011 Elsevier BM. All rights reserved.
AB - Electrochemical synthesis of ammonia was investigated using a cobalt-free La0.6Sr0.4Fe0.8Cu0.2O3-delta-Ce-0.8-sm(0.2)O(2-delta) (LSFCu-SDC) composite cathode and SDC-ternary carbonate composite electrolyte. La0.6Sr0.4Fe0.8-Cu0.2O3-delta and Ce0.8Sm0.2O2-delta 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 degrees C and the maximum rate of ammonia production was found to be 5.39 x 10(-9) mol s(-1) cm(-2) at 450 degrees C and 0.8 V. The AC impedance measurements were recorded before and after the ammonia synthesis in the range of temperature 400-475 degrees C. The formation of ammonia at the N-2 side together with stable current at 450 degrees C under constant voltage demonstrates that SDC-(Li/Na/K)(2)CO3 composite electrolyte exhibits significant proton conduction at a temperature around 450 degrees C. (C) 2011 Elsevier BM. All rights reserved.
KW - solid state ionics
KW - ammonia
KW - doped-ceria-carbonate
KW - electrolyte
KW - perovskite cathode
KW - TIC - Bionanotechnology
UR - http://www.scopus.com/inward/record.url?scp=80053947407&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2011.08.003
DO - 10.1016/j.ssi.2011.08.003
M3 - Article
VL - 201
SP - 94
EP - 100
JO - Solid State Ionics
T2 - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 1
ER -