Industrial-Scale Synthesis of Green Ammonia over Lanthanum Coated Iron-Based Catalysts under Mild Conditions

2026-05-28

PRE

Xiangrui Kong

Chuhan Yin

Jiewei Zhu

Zhongliang Cao

Xuecheng Liu

Cuijuan Zhang

Tieliang Li *

Wenkui Lin

Zeyuan Gao

Minghao Guo

Runchao Qin

Langli Luo

曹

曹昂 (Ang Cao) *

于

于一夫 (Yifu Yu) *

DOI：10.1021/acsami.6c06126

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Recently, there is an increasing interest in utilizing renewable energy to prepare green ammonia under milder conditions. However, existing commercial iron (Fe)-based catalysts require constant operation and harsh reaction conditions, which mismatch the fluctuation and distribution of renewable solar/wind energy. Herein, we proposed a lanthanum (La) modification strategy to improve the antifluctuation and low-temperature ammonia synthesis performance of Fe-based catalyst. Dynamics experiments and theoretical simulations indicate that the introduction of La could enhance the hydrogenation of adsorbed nitrogen atoms, thereby promoting low-temperature activity. A uniform coating of La on surface can prevent the aggregation of iron nanoparticles, thus improving their stability against fluctuations. Moreover, we used the melting technique to prepare ton-scale Fe/La catalysts, in which La was uniformly deposited on Fe particles. Finally, an industrial-scale project for the flexible production of green ammonia with an annual output of hundreds of tons was built by using as-prepared Fe/La catalysts, demonstrating its industrial application value.

Keywords:

Ammonia

Catalysts

Catalytic reactions

Diffraction

Nitrogen

ammonia synthesis

mild condition

antifluctuation

industrial production

Fe/La catalyst

Industrial-Scale Synthesis of Green Ammonia over Lanthanum Coated Iron-Based Catalysts under Mild Conditions

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