The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co–Re catalysts

K. McAulay; J.S.J. Hargreaves; A.R. McFarlane; D.J. Price; N.A. Spencer; N. Bion; F. Can; M. Richard; H.F. Greer; W.Z. Zhou

doi:10.1016/j.catcom.2015.04.016

The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co–Re catalysts

K. McAulay, J.S.J. Hargreaves , A.R. McFarlane, D.J. Price, N.A. Spencer, N. Bion, F. Can, M. Richard, H.F. Greer, W.Z. Zhou

Chemical Science

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Abstract

CoRe4 catalysts highly active for ammonia synthesis at ambient pressure and 400 °C can be prepared without anammonolysis stage. Pre-treatments under 3:1 H2:N2 and 3:1 H2:Ar atmospheres are shown to influence catalytic performance with the latter treatment leading to an induction period prior to development of activity upon switching to an ammonia synthesis feedstream. The difference in behaviour between the two pre-treatment atmospheres is manifested in temperature programmed nitrogen isotopic exchange experiments where H2:Ar treated material is inactive and its H2:N2 treated counterpart is active.

Original language	English
Pages (from-to)	53-57
Number of pages	5
Journal	Catalysis Communications
Volume	68
Early online date	12 Apr 2015
DOIs	https://doi.org/10.1016/j.catcom.2015.04.016
Publication status	Published - 5 Aug 2015

Keywords

ammonia
cobalt
rhenium
hydrogen
nitride

Documents and Links

10.1016/j.catcom.2015.04.016

McAulay K. (2015) The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co–Re catalysts
© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license. https://creativecommons.org/licenses/by/4.0/
Final published version, 1.1 MBLicence: CC BY

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McAulay, K., Hargreaves , J. S. J., McFarlane, A. R., Price, D. J., Spencer, N. A., Bion, N., Can, F., Richard, M., Greer, H. F., & Zhou, W. Z. (2015). The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co–Re catalysts. Catalysis Communications, 68, 53-57. https://doi.org/10.1016/j.catcom.2015.04.016

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abstract = "CoRe4 catalysts highly active for ammonia synthesis at ambient pressure and 400 °C can be prepared without anammonolysis stage. Pre-treatments under 3:1 H2:N2 and 3:1 H2:Ar atmospheres are shown to influence catalytic performance with the latter treatment leading to an induction period prior to development of activity upon switching to an ammonia synthesis feedstream. The difference in behaviour between the two pre-treatment atmospheres is manifested in temperature programmed nitrogen isotopic exchange experiments where H2:Ar treated material is inactive and its H2:N2 treated counterpart is active.",

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author = "K. McAulay and J.S.J. Hargreaves and A.R. McFarlane and D.J. Price and N.A. Spencer and N. Bion and F. Can and M. Richard and H.F. Greer and W.Z. Zhou",

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AU - McAulay, K.

AU - Hargreaves , J.S.J.

AU - McFarlane, A.R.

AU - Price, D.J.

AU - Spencer, N.A.

AU - Bion, N.

AU - Can, F.

AU - Richard, M.

AU - Greer, H.F.

AU - Zhou, W.Z.

PY - 2015/8/5

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N2 - CoRe4 catalysts highly active for ammonia synthesis at ambient pressure and 400 °C can be prepared without anammonolysis stage. Pre-treatments under 3:1 H2:N2 and 3:1 H2:Ar atmospheres are shown to influence catalytic performance with the latter treatment leading to an induction period prior to development of activity upon switching to an ammonia synthesis feedstream. The difference in behaviour between the two pre-treatment atmospheres is manifested in temperature programmed nitrogen isotopic exchange experiments where H2:Ar treated material is inactive and its H2:N2 treated counterpart is active.

AB - CoRe4 catalysts highly active for ammonia synthesis at ambient pressure and 400 °C can be prepared without anammonolysis stage. Pre-treatments under 3:1 H2:N2 and 3:1 H2:Ar atmospheres are shown to influence catalytic performance with the latter treatment leading to an induction period prior to development of activity upon switching to an ammonia synthesis feedstream. The difference in behaviour between the two pre-treatment atmospheres is manifested in temperature programmed nitrogen isotopic exchange experiments where H2:Ar treated material is inactive and its H2:N2 treated counterpart is active.

KW - ammonia

KW - cobalt

KW - rhenium

KW - hydrogen

KW - nitride

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DO - 10.1016/j.catcom.2015.04.016

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EP - 57

JO - Catalysis Communications

JF - Catalysis Communications

SN - 1566-7367

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