Issue 60, 2024

Inverse kinetic isotope effect of ammonia decomposition over Ru/CeO2 using deuterated ammonia

Abstract

This study investigated the ammonia decomposition mechanism over Ru/CeO2. Isotopic tests using ND3 revealed that the rate-determining step involves adsorbed nitrogen atoms on Ru. Moreover, an inverse kinetic isotope effect where ND3 decomposition was faster than NH3 was clearly observed. The origin of the inverse effect was explained by the lower D coverage on the catalyst surface compared to H coverage for mitigating the inhibition of ND3 activation.

Graphical abstract: Inverse kinetic isotope effect of ammonia decomposition over Ru/CeO2 using deuterated ammonia

Supplementary files

Article information

Article type
Communication
Submitted
17 May 2024
Accepted
11 Jun 2024
First published
05 Jul 2024
This article is Open Access
Creative Commons BY-NC license

Chem. Commun., 2024,60, 7713-7716

Inverse kinetic isotope effect of ammonia decomposition over Ru/CeO2 using deuterated ammonia

T. Suguro, F. Kishimoto, S. Kuramoto, W. J. Movick and K. Takanabe, Chem. Commun., 2024, 60, 7713 DOI: 10.1039/D4CC02372B

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