Development of a Ba-CoCe catalyst for the efficient and stable decomposition of ammonia

Natalia Sanchez Morlanes; Salvador Sayas; Genrikh Shterk; Sai P. Katikaneni; Aadesh Harale; Bandar Solami; Jorge Gascon

doi:10.1039/d0cy02336a

Development of a Ba-CoCe catalyst for the efficient and stable decomposition of ammonia

Natalia Sanchez Morlanes, Salvador Sayas, Genrikh Shterk, Sai P. Katikaneni, Aadesh Harale, Bandar Solami, Jorge Gascon

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26 Scopus citations

Abstract

Barium-promoted cobalt-cerium catalysts prepared by coprecipitation are efficient and stable at decomposing ammonia. Catalysts with the optimal composition show very similar activity and better stability than benchmark solids containing Ru. Characterization studies reveal that cerium plays a key role as a structural promoter, increasing cobalt dispersion and preventing sintering. These features translate into a very active and stable catalyst. Kinetic analysis shows a decrease in the apparent activation energy upon Ba promotion and a decrease in the negative hydrogen reaction order, highlighting the role of the alkaline earth metal in alleviating the negative effect of hydrogen and reducing the hydrogenation properties of cobalt, which results in further improvement of the catalytic activity.

Original language	English (US)
Pages (from-to)	3014-3024
Number of pages	11
Journal	Catalysis Science and Technology
Volume	11
Issue number	9
DOIs	https://doi.org/10.1039/d0cy02336a
State	Published - 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-12-14
Acknowledgements: The authors gratefully acknowledge the financial support provided by Saudi Aramco and the resources and facilities provided by the King Abdullah University of Science and Technology.

ASJC Scopus subject areas

Catalysis

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10.1039/d0cy02336a

https://repository.kaust.edu.sa/bitstream/10754/669331/1/Development%20of....d0cy02336a.pdf

Cite this

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abstract = "Barium-promoted cobalt-cerium catalysts prepared by coprecipitation are efficient and stable at decomposing ammonia. Catalysts with the optimal composition show very similar activity and better stability than benchmark solids containing Ru. Characterization studies reveal that cerium plays a key role as a structural promoter, increasing cobalt dispersion and preventing sintering. These features translate into a very active and stable catalyst. Kinetic analysis shows a decrease in the apparent activation energy upon Ba promotion and a decrease in the negative hydrogen reaction order, highlighting the role of the alkaline earth metal in alleviating the negative effect of hydrogen and reducing the hydrogenation properties of cobalt, which results in further improvement of the catalytic activity.",

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AU - Morlanes, Natalia Sanchez

AU - Sayas, Salvador

AU - Shterk, Genrikh

AU - Katikaneni, Sai P.

AU - Harale, Aadesh

AU - Solami, Bandar

AU - Gascon, Jorge

N1 - KAUST Repository Item: Exported on 2021-12-14 Acknowledgements: The authors gratefully acknowledge the financial support provided by Saudi Aramco and the resources and facilities provided by the King Abdullah University of Science and Technology.

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Y1 - 2021

N2 - Barium-promoted cobalt-cerium catalysts prepared by coprecipitation are efficient and stable at decomposing ammonia. Catalysts with the optimal composition show very similar activity and better stability than benchmark solids containing Ru. Characterization studies reveal that cerium plays a key role as a structural promoter, increasing cobalt dispersion and preventing sintering. These features translate into a very active and stable catalyst. Kinetic analysis shows a decrease in the apparent activation energy upon Ba promotion and a decrease in the negative hydrogen reaction order, highlighting the role of the alkaline earth metal in alleviating the negative effect of hydrogen and reducing the hydrogenation properties of cobalt, which results in further improvement of the catalytic activity.

AB - Barium-promoted cobalt-cerium catalysts prepared by coprecipitation are efficient and stable at decomposing ammonia. Catalysts with the optimal composition show very similar activity and better stability than benchmark solids containing Ru. Characterization studies reveal that cerium plays a key role as a structural promoter, increasing cobalt dispersion and preventing sintering. These features translate into a very active and stable catalyst. Kinetic analysis shows a decrease in the apparent activation energy upon Ba promotion and a decrease in the negative hydrogen reaction order, highlighting the role of the alkaline earth metal in alleviating the negative effect of hydrogen and reducing the hydrogenation properties of cobalt, which results in further improvement of the catalytic activity.

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Development of a Ba-CoCe catalyst for the efficient and stable decomposition of ammonia

Abstract

Bibliographical note

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