Electrochemical synthesis of ammonia from N2 and H2O based on (Li,Na,K)2CO3-Ce0.8Gd 0.18Ca0.02O2-δ composite electrolyte and CoFe2O4 cathode

Ibrahim A. Amar, Christophe T. G. Petit, Gregory Mann, Rong Lan, Peter J. Skabara, Shanwen Tao

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Electrochemical synthesis of ammonia from water vapour and nitrogen was investigated using an electrolytic cell based on CoFe2O 4-Ce0.8Gd0.18Ca0.02O 2-δ (CFO-CGDC), CGDC-ternary carbonate composite and Sm 0.5Sr0.5CoO3-δ-Ce0.8Gd 0.18Ca0.02O2-δ (SSCo-CGDC) as cathode, electrolyte and anode respectively. CoFe2O4, CGDC and SCCo were prepared via a combined EDTA-citrate complexing sol-gel and characterised by X-ray diffraction (XRD). The AC ionic conductivities of the CGDC-carbonate composite were investigated under three different atmospheres (air, dry O 2 and wet 5% H2-Ar). A tri-layer electrolytic cell was fabricated by a cost-effective one-step dry-pressing and co-firing process. Ammonia was successfully synthesised from water vapour and nitrogen under atmospheric pressure and the maximum rate of ammonia production was found to be 6.5 × 10-11 mol s-1 cm-2 at 400 C and 1.6 V which is two orders of magnitude higher than that of previous report when ammonia was synthesised from N2 and H2O at 650 C. 

LanguageEnglish
Pages4322-4330
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number9
DOIs
Publication statusPublished - 18 Mar 2014

Fingerprint

electrochemical synthesis
ammonia
Ammonia
Cathodes
cathodes
Electrolytes
electrolytes
Electrolytic cells
electrolytic cells
composite materials
Composite materials
Water vapor
water vapor
Carbonates
carbonates
Nitrogen
nitrogen
ethylenediaminetetraacetic acids
Ethylenediaminetetraacetic acid
citrates

Keywords

  • co-doped ceria-carbonate composite electrolyte
  • electrochemical synthesis of ammonia
  • nitrogen
  • spinels
  • water

Cite this

Amar, Ibrahim A. ; Petit, Christophe T. G. ; Mann, Gregory ; Lan, Rong ; Skabara, Peter J. ; Tao, Shanwen. / Electrochemical synthesis of ammonia from N2 and H2O based on (Li,Na,K)2CO3-Ce0.8Gd 0.18Ca0.02O2-δ composite electrolyte and CoFe2O4 cathode. In: International Journal of Hydrogen Energy. 2014 ; Vol. 39, No. 9. pp. 4322-4330.
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abstract = "Electrochemical synthesis of ammonia from water vapour and nitrogen was investigated using an electrolytic cell based on CoFe2O 4-Ce0.8Gd0.18Ca0.02O 2-δ (CFO-CGDC), CGDC-ternary carbonate composite and Sm 0.5Sr0.5CoO3-δ-Ce0.8Gd 0.18Ca0.02O2-δ (SSCo-CGDC) as cathode, electrolyte and anode respectively. CoFe2O4, CGDC and SCCo were prepared via a combined EDTA-citrate complexing sol-gel and characterised by X-ray diffraction (XRD). The AC ionic conductivities of the CGDC-carbonate composite were investigated under three different atmospheres (air, dry O 2 and wet 5{\%} H2-Ar). A tri-layer electrolytic cell was fabricated by a cost-effective one-step dry-pressing and co-firing process. Ammonia was successfully synthesised from water vapour and nitrogen under atmospheric pressure and the maximum rate of ammonia production was found to be 6.5 × 10-11 mol s-1 cm-2 at 400 C and 1.6 V which is two orders of magnitude higher than that of previous report when ammonia was synthesised from N2 and H2O at 650 C. ",
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Electrochemical synthesis of ammonia from N2 and H2O based on (Li,Na,K)2CO3-Ce0.8Gd 0.18Ca0.02O2-δ composite electrolyte and CoFe2O4 cathode. / Amar, Ibrahim A.; Petit, Christophe T. G.; Mann, Gregory; Lan, Rong; Skabara, Peter J.; Tao, Shanwen.

In: International Journal of Hydrogen Energy, Vol. 39, No. 9, 18.03.2014, p. 4322-4330.

Research output: Contribution to journalArticle

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T1 - Electrochemical synthesis of ammonia from N2 and H2O based on (Li,Na,K)2CO3-Ce0.8Gd 0.18Ca0.02O2-δ composite electrolyte and CoFe2O4 cathode

AU - Amar, Ibrahim A.

AU - Petit, Christophe T. G.

AU - Mann, Gregory

AU - Lan, Rong

AU - Skabara, Peter J.

AU - Tao, Shanwen

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Y1 - 2014/3/18

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AB - Electrochemical synthesis of ammonia from water vapour and nitrogen was investigated using an electrolytic cell based on CoFe2O 4-Ce0.8Gd0.18Ca0.02O 2-δ (CFO-CGDC), CGDC-ternary carbonate composite and Sm 0.5Sr0.5CoO3-δ-Ce0.8Gd 0.18Ca0.02O2-δ (SSCo-CGDC) as cathode, electrolyte and anode respectively. CoFe2O4, CGDC and SCCo were prepared via a combined EDTA-citrate complexing sol-gel and characterised by X-ray diffraction (XRD). The AC ionic conductivities of the CGDC-carbonate composite were investigated under three different atmospheres (air, dry O 2 and wet 5% H2-Ar). A tri-layer electrolytic cell was fabricated by a cost-effective one-step dry-pressing and co-firing process. Ammonia was successfully synthesised from water vapour and nitrogen under atmospheric pressure and the maximum rate of ammonia production was found to be 6.5 × 10-11 mol s-1 cm-2 at 400 C and 1.6 V which is two orders of magnitude higher than that of previous report when ammonia was synthesised from N2 and H2O at 650 C. 

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KW - spinels

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T2 - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

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