najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМОnajo-8Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХLa and Co-based materials for ammonia decomposition: activity, stability and structural changeshttps://orcid.org/0000-0001-6289-8029BorisovVadim Andreevichborisovtiger86@mail.ruCenter of New Chemical Technologies BIC, Boreskov Institute of CatalysisRussian Federation2025050220261648Copyright © Borisov V.A., 20252025Borisov V.A.Borisov V.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/8

The La0.9Sr0.1Sc0.9Co0.1O3-δ (LS) and La0.9Sr0.1CoO3-δ (LC) phases and composite materials based on them were synthesized. There are data in the literature on the activity of pure or modified forms of LC in ammonia decomposition, but there are no data on the activity of the LS phase and LS-LC composites. Therefore, the stability and activity of LS-LC composites and initial LS and LC in ammonia decomposition were investigated. The best result in the decomposition of ammonia at 700 °C and WHSV of 60 000 ml NH3·gcat-1·h-1 shows LC – 99%, the worst LS – 80%. Under the same conditions, the activity of samples LC, 40LS-60LC and 50LS-50LC remains unchanged for 40 hours. It was found that during ammonia decomposition, the LC phase decomposes to form cobalt and La(OH)3 nanoparticles, but the LS phase does not undergo significant changes, which is confirmed by X-ray diffraction, IR spectroscopy, Raman spectroscopy and TEM.

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The authors declare that there are no conflicts of interest present.