Issue 9, 2021

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

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.

Graphical abstract: Development of a Ba–CoCe catalyst for the efficient and stable decomposition of ammonia

Supplementary files

Article information

Article type
Paper
Submitted
03 Dec 2020
Accepted
05 Mar 2021
First published
08 Mar 2021
This article is Open Access
Creative Commons BY license

Catal. Sci. Technol., 2021,11, 3014-3024

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

N. Morlanés, S. Sayas, G. Shterk, S. P. Katikaneni, A. Harale, B. Solami and J. Gascon, Catal. Sci. Technol., 2021, 11, 3014 DOI: 10.1039/D0CY02336A

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