Chemistry

Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition

H. Fang, S. Wu, et al.

This groundbreaking research from authors at the University of Oxford and other institutions explores the remarkable catalytic activity of atomically dispersed Ru atoms on MgO(111) for ammonia decomposition, achieving a record-breaking decomposition rate by leveraging strong metal-support interactions. This study challenges existing beliefs by showing that more Ru does not always mean better performance.

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Abstract

This paper investigates the catalytic activity of atomically dispersed Ru atoms on MgO(111) for ammonia decomposition. The researchers found that this catalyst exhibits a higher rate of ammonia decomposition than any previously reported catalyst, attributed to strong metal-support interaction and efficient surface coupling reaction. Increasing Ru concentration initially boosts activity due to synergistic metal sites, but further increases lead to a drop in activity as Ru clusters/nanoparticles form. This challenges the conventional view of higher activity for coordinated Ru atoms in clusters. Various characterization techniques and DFT modeling support the findings.

Publisher

Nature Communications

Published On

Feb 06, 2023

Authors

Huihuang Fang, Simson Wu, Tugce Ayvali, Jianwei Zheng, Joshua Fellowes, Ping-Luen Ho, Kwan Chee Leung, Alexander Large, Georg Held, Ryuichi Kato, Kazu Suenaga, Yves Ira A. Reyes, Ho Viet Thang, Hsin-Yi Tiffany Chen, Shik Chi Edman Tsang

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