Abstract: Сommercial cerium-zirconium oxide supports (Ce0.5Zr0.5O2, Ce0.75Zr0.25O2 and Ce0.4Zr0.5Y0.05La0.05O2) were used to prepare Ru/CeZrOx catalysts by the sorption-hydrolytic method with ruthenium loading of ~2 wt %. The catalyst specific surface areas ranged within 80–91 m2/g. The XRD data indicate the formation of a substitutional solid solution. According to the HRTEM data, there are no ruthenium particles on the support surface in Ru/Се0.75Zr0.25О2 and Ru/Ce0.4Zr0.5Y0.05La0.05O2 samples. Most likely, the ruthenium particles are in a highly dispersed state. At 500°C and WHSV of 300 000 h–1, the catalysts demonstrated the highest hydrogen productivity of 73.8–85.4 min–1) and NH3 conversion of 22–25.5% that compares well with the best results reported in the literature and exceeds the catalysts performance we have previously obtained for Ru/Ce0.75Zr0.25O2 catalyst prepared by impregnation. The activity of most active Ru/Ce0.4Zr0.5Y0.05La0.05 catalyst remained stable throughout the all test period (~46 h).

Cite: Fedorova Z.A. , Borisov V.A. , Temerev V.L. , Gerasimov E.Y. , Svintsitskiy D.A. , Shlyapin D.A. , Snytnikov P.V.
Ammonia Decomposition for Hydrogen Production on Се1 – хZrхО2 Based Ru Catalysts
Kinetics and Catalysis. 2025. DOI: 10.1134/s0023158425600427 Scopus OpenAlex

Dates:

Submitted:	May 16, 2025
Accepted:	Jul 9, 2025
Published online:	Sep 19, 2025

Identifiers:

Scopus:	2-s2.0-105016736986
OpenAlex:	W4414381059

Citing: Пока нет цитирований

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