57Iron transmission and conversion electron mössbauer spectroscopic characterization of iron-cobalt ammonia synthesis catalysts

M J Tricker; P P Vaishnava; D. A. Whan

⁵⁷Iron transmission and conversion electron mössbauer spectroscopic characterization of iron-cobalt ammonia synthesis catalysts

M J Tricker, P P Vaishnava, D. A. Whan

School of Engineering & Physical Sciences

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19 Citations (Scopus)

Abstract

The results of a ⁵⁷Fe transmission and conversion electron Mössbauer spectroscopic (CEMS) study of a series of Fe-Co ammonia synthesis catalysts are reported. The catalysts were prepared by conventional coprecipitation techniques, followed by calcining, reducing and stabilisation steps. The calcined samples are multiphasic and are composed mainly of iron oxides and/or cobalt spinels. The reduced and stabilised samples are shown to consist of a Fe-Co alloy core encased in an oxide shell in which the Co/Fe ratio exceeds the Co/Fe ratio of the alloy core. It is likely that the iron-cobalt distribution in the alloy core is inhomogeneous. © 1982.

Original language	English
Pages (from-to)	283-295
Number of pages	13
Journal	Applied Catalysis
Volume	3
Issue number	3
Publication status	Published - 15 Jul 1982

Cite this

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AU - Tricker, M J

AU - Vaishnava, P P

AU - Whan, D. A.

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N2 - The results of a 57Fe transmission and conversion electron Mössbauer spectroscopic (CEMS) study of a series of Fe-Co ammonia synthesis catalysts are reported. The catalysts were prepared by conventional coprecipitation techniques, followed by calcining, reducing and stabilisation steps. The calcined samples are multiphasic and are composed mainly of iron oxides and/or cobalt spinels. The reduced and stabilised samples are shown to consist of a Fe-Co alloy core encased in an oxide shell in which the Co/Fe ratio exceeds the Co/Fe ratio of the alloy core. It is likely that the iron-cobalt distribution in the alloy core is inhomogeneous. © 1982.

AB - The results of a 57Fe transmission and conversion electron Mössbauer spectroscopic (CEMS) study of a series of Fe-Co ammonia synthesis catalysts are reported. The catalysts were prepared by conventional coprecipitation techniques, followed by calcining, reducing and stabilisation steps. The calcined samples are multiphasic and are composed mainly of iron oxides and/or cobalt spinels. The reduced and stabilised samples are shown to consist of a Fe-Co alloy core encased in an oxide shell in which the Co/Fe ratio exceeds the Co/Fe ratio of the alloy core. It is likely that the iron-cobalt distribution in the alloy core is inhomogeneous. © 1982.

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M3 - Article

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JO - Applied Catalysis

JF - Applied Catalysis

IS - 3

ER -

⁵⁷Iron transmission and conversion electron mössbauer spectroscopic characterization of iron-cobalt ammonia synthesis catalysts

Abstract

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