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CeO2 modified Ru/γ-Al2O3 catalysts for ammonia decomposition reaction by Qinglu Meng; Haoxin Liu; Kai Xu; Weiwei Wang; Chunjiang Jia is a Materials Science article available to read on EtoBox.

What is CeO2 modified Ru/γ-Al2O3 catalysts for ammonia decomposition reaction about?

Developing high-performance ammonia decomposition catalysts for preparing CO x -free hydrogen shows great practical significance. Herein, CeO 2 is used as a promoter to modulate the metal-support interaction to enhance the catalytic performance of Ru/Al 2 O 3 catalysts. A series of 1Ru/xCe-10Al (x 1⁄4 0.5, 1, or 3) catalysts was prepared by a facile colloidal deposition method. We find that the optimized 1Ru/1Cee10Al catalyst exhibits excellent activity for the decomposition of ammonia with a very high hydrogen yield of 7097 mmol H2 /(g Ru $min) at 450 C. It is confirmed that Ru species are highly dispersed on the support surface as stable small clusters (~1.3 nm). More importantly, due to the interaction between Ru species and partially reduced CeO 2ex , the electron density of Ru species is increased, which is beneficial to the high activity of the 1Ru/xCe-10Al catalysts. This work paves a way to construct high-efficiency ammonia decomposition catalysts modified by CeO 2 .

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Author

Qinglu Meng; Haoxin Liu; Kai Xu; Weiwei Wang; Chunjiang Jia

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)