Electrochemical synthesis of ammonia based on a carbonate-oxide composite electrolyte

Ibrahim A. Amar, Rong Lan, Christophe T. G. Petit, Valeria Arrighi, Shanwen Tao

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Electrochemical synthesis of ammonia based on carbonate electrolyte is presented in this paper. Spinel oxide CoFe2O4 was synthesised via a co-precipitation method and characterised by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Ammonia was successfully synthesised from hydrogen and nitrogen under atmospheric pressure using CoFe2O4 as catalyst (primary particle size 10-20 nm) together with silver at the cathode, Ag-Pd at the anode and carbonate-LiAlO2 composite as electrolyte respectively. Ammonia formation was observed at 400,425 and 450 degrees C and the maximum rate of ammonia production was found to be 2.32 x 10(-10) mol s(-1) cm(-2) at 400 degrees C and 0.8 V. The AC impedance measurements were recorded before and after the ammonia synthesis at 400, 425 and 450 degrees C. The electrolytic cell during the ammonia synthesis process was more stable at 450 degrees C and 0.8 V over a period of 2 h. This experiment also indicates that the carbonate-LiAlO2 composite electrolyte exhibits proton conduction.

LanguageEnglish
Pages133-138
Number of pages6
JournalSolid State Ionics
Volume182
Issue number1
DOIs
Publication statusPublished - 3 Feb 2011

Fingerprint

electrochemical synthesis
Carbonates
Ammonia
Oxides
Electrolytes
ammonia
carbonates
electrolytes
composite materials
oxides
Composite materials
Electrolytic cells
electrolytic cells
impedance measurement
synthesis
Coprecipitation
Silver
Atmospheric pressure
spinel
Protons

Keywords

  • electrochemical synthesis of ammonia
  • carbonate
  • proton conduction
  • CoFe2O4
  • spinel catalyst
  • impedance spectroscopy

Cite this

Amar, Ibrahim A. ; Lan, Rong ; Petit, Christophe T. G. ; Arrighi, Valeria ; Tao, Shanwen. / Electrochemical synthesis of ammonia based on a carbonate-oxide composite electrolyte. In: Solid State Ionics . 2011 ; Vol. 182, No. 1. pp. 133-138.
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Electrochemical synthesis of ammonia based on a carbonate-oxide composite electrolyte. / Amar, Ibrahim A.; Lan, Rong; Petit, Christophe T. G.; Arrighi, Valeria; Tao, Shanwen.

In: Solid State Ionics , Vol. 182, No. 1, 03.02.2011, p. 133-138.

Research output: Contribution to journalArticle

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