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

Research output: Contribution to journalArticlepeer-review

2 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 languageEnglish (US)
Pages (from-to)3014-3024
Number of pages11
JournalCatalysis Science and Technology
Volume11
Issue number9
DOIs
StatePublished - 2021

ASJC Scopus subject areas

  • Catalysis

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