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  Promoter effect on the reduction behavior of wuestite-based catalysts for ammonia synthesis

Folke, J., Dembélé, K., Girgsdies, F., Song, H., Eckert, R., Reitmeier, S., et al. (2022). Promoter effect on the reduction behavior of wuestite-based catalysts for ammonia synthesis. Catalysis Today, 387, 12-22. doi:10.1016/j.cattod.2021.03.013.

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1-s2.0-S092058612100122X-main.pdf (Publisher version), 10MB
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 Creators:
Folke , Jan1, Author
Dembélé, Kassiogé2, Author              
Girgsdies, Frank2, Author              
Song, Huiqing1, Author
Eckert, Rene3, Author
Reitmeier, Stephan3, Author
Reitzmann, Andreas3, Author
Schlögl, Robert1, 2, Author              
Lunkenbein, Thomas2, Author              
Ruland, Holger1, Author
Affiliations:
1Max Planck Institute for Chemical Energy Conversion, Department Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Department Heterogeneous Reactions, Stiftstraße 34-36, Mülheim an der Ruhr, 45470, Germany, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Clariant Produkte (Deutschland) GmbH, Heufeld, Germany, ou_persistent22              

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 Abstract: Ammonia synthesis remains one of the most important catalytic processes since it enables efficient hydrogen storage and provides the basis for the production of fertilizers. Herein, complementary bulk and local analytical techniques were combined to investigate the effect of selected promoters (Al, K, Ca) on the reduction of wuestite into α-iron and their catalytic performance for ammonia synthesis. The use of promoters appears to have a positive effect on the wuestite-derived catalyst in ammonia synthesis. The promoters seemingly act as a binder for wuestite grains and impede the reduction and disproportionation events of wuestite precursors resulting in an increased catalytic performance. This effect is associated with an increase of surface area and mesoporosity. The study delivers new insights into the interplay of structure and promoters in wuestite-based catalysts.

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Language(s): eng - English
 Dates: 2020-11-292021-03-072021-03-232022-03-01
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.cattod.2021.03.013
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Title: Catalysis Today
  Abbreviation : Catal. Today
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 11 Volume / Issue: 387 Sequence Number: - Start / End Page: 12 - 22 Identifier: ISSN: 0920-5861
CoNE: https://pure.mpg.de/cone/journals/resource/954925564669